DEAS 468:2023 
ICS 77.140 .01 
 
© EAC 2023                                                                                                                            Fouth  Edition 2023  
 DRAFT EAST AFRICAN STANDARD  
Pre-painted metal coated steel sheets and coils  — Specification  
EAST AFRICAN COMMUNITY  DEAS 468:202 3 
ii © EAC  2023 – All righ ts reserved  
 Copyright notice  
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Reproduction for sales purposes may be subject to royalty payments or a licensing agreement.  
Violators may be prosecuted . DEAS 468:202 3 
© EAC 2023 – All rights reserved  iii 
 Contents  Page 
Foreword  ................................ ................................ ................................ ................................ ............................  iv 
1 Scope  ................................ ................................ ................................ ................................ ......................  1 
2 Normative refere nces  ................................ ................................ ................................ ............................  1 
3 Terms and definitions  ................................ ................................ ................................ ...........................  1 
4 Substrate  ................................ ................................ ................................ ................................ ................  2 
5 Classification and symbol  ................................ ................................ ................................ ....................  3 
5.1 Classification of durability of paint coatings  ................................ ................................ .....................  3 
5.2 Classification of applications  ................................ ................................ ................................ ...............  3 
6 Paint coating durability  ................................ ................................ ................................ .........................  6 
7 Surface protective treatments  ................................ ................................ ................................ ..............  6 
8 Physical properties of p aint coatings  ................................ ................................ ................................ . 6 
9 Dimensions  ................................ ................................ ................................ ................................ ............  7 
10 Paint coating (dry film thickness)  ................................ ................................ ................................ ........  7 
10.1  Primer  ................................ ................................ ................................ ................................ .....................  7 
10.2  Wash coat  ................................ ................................ ................................ ................................ ...............  8 
10.3  Top coat  ................................ ................................ ................................ ................................ ..................  8 
11 Shapes  ................................ ................................ ................................ ................................ ....................  8 
11.1  Camber  ................................ ................................ ................................ ................................ ...................  8 
11.2  Deviation from squareness  ................................ ................................ ................................ ..................  8 
11.3  Flatness  ................................ ................................ ................................ ................................ ..................  8 
12 Appearance  ................................ ................................ ................................ ................................ ............  9 
13 Tests  ................................ ................................ ................................ ................................ .......................  9 
13.1  General  ................................ ................................ ................................ ................................ ...................  9 
13.2  Endurance tests for coatings  ................................ ................................ ................................ ...............  9 
13.2.1  Salt spray test  ................................ ................................ ................................ ................................ ........  9 
13.2.2  Accelerated weath ering test  ................................ ................................ ................................ .................  9 
13.3  Tests for physical properties of paint coating  ................................ ................................ .................  10 
13.3.1  Sampling of test specimens  ................................ ................................ ................................ ...............  10 
13.3.2  Bend test  ................................ ................................ ................................ ................................ ..............  10 
13.3.3  Pencil hardness test ................................ ................................ ................................ ............................  11 
13.3.4  Impact test  ................................ ................................ ................................ ................................ ............  12 
13.3.5  Cross -scoring test  ................................ ................................ ................................ ...............................  12 
13.3.6  Abrasion Methyl Ethyl Ketone  (MEK) test ................................ ................................ .........................  12 
13.4  Cautions for testing  ................................ ................................ ................................ .............................  13 
14 Inspection  ................................ ................................ ................................ ................................ .............  13 
15 Marking  ................................ ................................ ................................ ................................ .................  13 
15.1 Reverse side marking  ................................ ................................ ................................ .........................  13 
15.2  Package marking  ................................ ................................ ................................ ................................ . 14 
16 Storage, transportation and fabrication  ................................ ................................ ............................  14 
Annex  A (informative)  Examples of indications for types of sheets and coils  ................................ .........  17 
Annex B (informative)   Ordering information  ................................ ................................ ................................  18 DEAS 468:202 3 
iv © EAC  2023 – All righ ts reserved  
 Foreword  
Development of the East African Standards has been necessitated by the need for harmonizing requirements 
governing quality of products and services in the East African Community. It is envisaged that through 
harmonized standardization, trade ba rriers that are encountered when goods and services are exchanged 
within the Community will be removed.  
The Community has established an East African Standards Committee  (EASC)  mandated to develop and 
issue East African Standards  (EAS) . The Committee is c omposed of representatives of the National 
Standards Bodies in Partner States, together with the representatives from the public and private sector 
organizations  in the community .  
East African Standards are developed through  Technical Committees that are representative of key 
stakeholders including government, academia, consumer groups, private sector and other interested parties. 
Draft East African Standards are circulated to stakeholders through the National Standards Bodies in the 
Partner States. The co mments received are discussed and incorporated before finalization of standards, in 
accordance with the Principles and procedures for develop ment of East African Standards . 
East African Standards are subject to review, to keep pace with technological advan ces. Users of the East 
African Standards are therefore expected to ensure that they always have the latest versions of the standards 
they are implementing .  
The committee responsible  for this document is Technical Committee EASC /TC 35, Steel and steel prod ucts. 
This fourth  editio n (DEAS 468:20 23) cancels and replaces the third edition (EAS  468:2019), which has been 
technically revised.  
 
 DRAFT EAST AFRICAN STANDARD  DEAS 468:202 3 
 
© EAC 2023 – All rights reserved  1 
 Pre-painted metal coated steel sheets and coils  — Specification  
1 Scope   
This East Africa n Standard specifies requirements, sampling and test methods for pre -painted metal coated 
steel sheets and coils . 
2 Normative references  
The following documents are referred to in the text in such a way that some or all of their content constitutes 
requirements of this document.  For dated references, o nly the edition cited applies. For undated references, 
the latest edition of the referenced document (including any amendments) applies.  
EAS 11, Hot-dip galvanized plain and corrugated steel  sheets — Specification  
EAS 410, Hot-dip aluminium -zinc coated pla in and corrugated steel sheets — Specification  
ISO 15184, Paints and varnishes — Determination of film hardness by pencil test  
ISO 1 5110, Paints and varnishes — Artificial weathering including acidic deposition  
3 Terms and definitions   
For the purposes of this document, the following terms and definitions apply.  
ISO and IEC maintain terminological databases for use in standardization at the following addresses:  
— ISO Online browsing platform: available at http://www.iso .org/obp  
3.1 
top (face) side  
side of the pre -painted sheet, which is exposed to weathering  
3.2 
bottom (reverse) side 
side of pre -painted sheet opposite the exposed weathering side  
3.3 
coating  
layer of material applied to a metal surface to provide protec tion  
3.4 
paint  
liquid or powder containing pigments, which, when applied to a substrate, forms a film having protective, 
decorative or specific technical properties   DEAS 468:2023  
2 © EAC  2023 – All righ ts reserved  
 3.5 
top coat 
additional layer on the surface which is exposed to weathering (with or with out integral lubricant) applied on 
the substrate in order to achieve functional properties such as additional corrosion protection, torque/tension 
performance, colour, chemical resistance   
3.6 
primer  
first complete layer of paint of a coating system applie d to an uncoated surface; the type of primer varies with 
the type of surface and its condition, the intended purpose, and the coating system being used  
3.7 
wash coat 
thin organic coating applied to the back or unexposed side of the pre -painted sheet (also known as a backer  
coat)  
NOTE  The purpose of the wash coat is to provide protection against damage to the top -side coating during shipment 
and storage and also provide some additional durability to the unexposed side during the service life of the product.  
3.8 
chalking  
formation on a pigmented coating of a friable powder evolved from the film itself at or just beneath the surface  
3.10 
fading  
loss in colour intensity experienced by pigmented organic coatings over time, generally due to the effect of 
ultravio let radiation  
3.9 
gloss  
lustre, shininess or reflecting ability of a surface  
3.10 
sheets  
broad, thin, mass or pieces of metal including flat and profiled  
3.11 
substrate  
surface to which a coating material is applied or is to be applied.  
3.12  
metal -coated sheet  
sheet coated with metallic material such as aluminium, zinc, silicon, etc.  
 
4 Substrate  
The substrate shall conform to all the requirements of EAS 11 and EAS 410 as per appropriate specification 
for the quality ordered.   DEAS 468:2023  
© EAC 2023 – All rights reserved  3 
 5 Classification and symbol  
5.1 Classification of durability of paint coatings  
5.1.1  The durability of paint coatings shall be classified into three classes and their symbols shall be as 
given in Table 1.  
Table 1 — Classification of durability of paint coatings and designations  
 
Class ification  Symbol  Durability  
Class 1  1 Two or more coats having durability as specified in Table 3  
Class 2  2 Two coats having durability as specified in Table 3  
Class 3  3 One coat having durability as specified in Table 3  
NOTE  For sheets and coils for w hich the quality is guaranteed for both sides, the classes of paint coating durability 
which have differences between the face side and the reverse side may be altered by agreement between the purchaser 
and the manufacturer.  
 
5.1.2  The classes of paint co ating, durability for the face side and the reverse side shall be expressed in 2 -
digit figures consisting of a combination of the designation of durability for the individual sides.  
Example:   
 
 
 
 
 
 
 
 
 
 
 
 
5.1.3  For both -side paint coating for which the qu ality is guaranteed for the face only, the non -guaranteed 
side shall be expressed by the digit 0.  
Example:  
  
 
 
 
 
 
NOTE  The term ―guarantee‖ implies  that the product is in compliance with the quality requirements specified in 
Clauses 6, 8, 10 and 12.  
5.2 Classification of applications  
5.2.1  Sheets and coils shall be classified into eleven  types, and their classified symbols shall be as given in 
Table 2.  
 
 3   2 
Reverse side, Class 2 
Face side, Class 3  
Reverse side, Class 3  
Face side, Class 3  
 
 
 3        3      
Reverse side, not guaranteed  
Face side, Class  2       0  DEAS 468:2023  
4 © EAC  2023 – All righ ts reserved  
 Table 2 A — Chemical composition  
Classified Symbol 
of Grade  for Base 
metal  Chemical composition in perc entage (%) , Maximum  
C Mn P S 
SGCC  0.15 0.80 0.05 0.05 
SGCH  0.18 1.20 0.08 0.05 
SGCD  1 0.12 0.60 0.04 0.04 
SGCD  2 0.10 0.45 0.03 0.03 
SGCD  3 0.08 0.45 0.03 0.03 
SGCD  4 0.06 0045  0.03 0.03 
SGC 340  0.25 1.70 0.20 0.05 
SGC  400 0.25 1.70 0.20 0.05 
SGC 440  0.25 2.00 0.20 0.05 
SGC  490 0.30 2.00 0.20 0.05 
SGC  570 0.30 2.50 0.20 0.05 
 DEAS 468:2023  
© EAC 2023 – All rights reserved  5 
  
Table 2  B — Classification of sheets and coils  
Classified symbol  of 
grade for pre -painted  
 Nominal thickness  
(base coated metal)  
mm Application  Classified symbol 
of grade for  base 
metal  
CGCC 0.25 ≤ x ≤ 1.6  Commercial soft  SGCC 
CGCH 0.25 ≤ x ≤ 1.0 Commercial hard  SGCH 
CGCD 1  0.40 ≤ x ≤. 2.3 
Drawing  SGCD 1  
CGCD 2  0.40 ≤ x ≤. 2.3  SGCD  2 
CGCD  3 0.60 ≤ x ≤. 2.3  SGCD  3 
CGCD  4 0.60 ≤ x ≤. 2.3  SGCD  4 
CGC 340  0.25 ≤ x ≤ 1.6 
Structural  SGC 340  
CGC 400  0.25 ≤ x ≤. 1.6 SGC 400  
CGC 440  0.25 ≤ x ≤ 1.6 SGC 440  
CGC 490  0.25 ≤ x ≤ 1.6 SGC 490  
CGC 570  0.25 ≤ x ≤. 1.6 SGC 570  
NOTE 1  G refers to the type of metal coating as described in EAS 11 and EAS 410 . 
NOTE 2  Nomina l thickness other than those listed in the above table may be decided as agreed upon between the 
purchaser and the manufacturer.  
NOTE 3  Examples of indications for types of sheets and coils are given in Annex A.  
 
5.2.2  For the type of coating and the coat ing mass on the metallic coated base metal for paint coating, EAS 
11 and EAS 410 shall apply.  
5.2.3 Coating systems supplied under this standard  shall consist of primer coat covered by various types 
and thicknesses of topcoats  except class 3 . The combinati on of primer and topcoat shall be classed as either 
a two -coat thin film system or as a two -coat (or more) thick film system. The organic coating shall consist of a 
primer and a topcoat on the top (exposed) side and  an optional wash coat on the bottom (une xposed) side  
that can either be tinted or non -tinted . 
5.2.4  In the case of sheets and coils for roofing and architectural sidings the symbol R for roofing and the 
symbol A for architectural siding shall be suffixed to the clas sified symbols given in Table 2. 
5.2.5  For sheets and coils subjected to corrugating, the symbol W and the shape symbol for corrugated 
sheets shall be suffixed to the classified symbols given in Table 2.  
5.2.6  For corrugation, the commercial soft and the commercial hard qualities liste d in Table 2 shall be used.  
5.2.7  For roofing and architectural siding uses (exterior exposed building products)  Class 2 or higher in the 
classification of paint coating durability shall be applied.  DEAS 468:2023  
6 © EAC  2023 – All righ ts reserved  
 6 Paint coating durability  
6.1 Sheets and coils shall be subjected to the dur ability test given in Table 3. The salt spray test shall be 
carried out in accordance with 13.2.1 and 13.4, and no defects, except for slight blistering and rust on the test 
piece, shall be found on the test piece as a result of this te st having been continued for the duration of time 
specified in Table 3.  
Table 3 — Durability test (salt spray and weathering test)  
Coating class  Gloss , 
% loss  Colo ur Dry Film 
Thickness 
(primer) , 
µm Minimum 
duration of salt 
spray test , 
hours  Minimum  duratio n 
accelerated 
weathering test , 
hours  
Class 1   30  Delta E of 4  4  - 6  2 000  1 500  
Class 2   35  Delta E of 6  4  - 6  500  1 000  
Class 3   40  Delta E of 8  Not 
applicable  200   500  
NOTE  Delta E is a single number that represents the ―distance‖ betwe en two colours . 
 
6.2 For class 3 in the classification of paint coating durability the symbol indicating a coating mass of D122 
in accordance with EAS 11  (equivalent for other coatings) or more shall be applied to the base metal for paint 
coating.  
6.3 When sheets and coils of Class 3 in the durability classification are subjected to the dew -cycle type 
accelerated weathering test in accordance with the provision of 13.2.2 and 13.4, they shall not show 
substantial discolo uration, fading or substantial chalki ng as a result of the test having been continued for the 
duration of time specified in Table 3  (Delta E minimum).  
7 Surface protective treatments  
For protective treatments after painting when applied on the surface of sheets and coils, the types and 
symbol s shall be as  given in Table 4.  
Table 4 — Classification of surface protective treatments and their symbols  
Classification of surface protective treats  Symbol  
Protective films  P 
Wax application  T 
 
8 Physical properties of paint coatings  
8.1 After being tested for items marked with ―X‖ in Table 5 in accordance with 13.3 and 13.4, sheets and coils 
shall, by visual inspection, be free from the defects given in Table 5.  DEAS 468:2023  
© EAC 2023 – All rights reserved  7 
 Table 5 — Physical properties  of paint coatings  
 
Characteristic   Commercial 
hard  
(CGCH);  
Structural 
(CGC 570) Commercial  soft 
(CGCC ), Drawing 
(CGCD 1, CGCD2, 
CGCD3, CGCD4 ) 
Structural  
(CGC 340, 400, 440, 
490) Requirement  Test method  
Bending 
adhesion  – X No peeling on the outer surface of the 
bent portion not less than 7 mm apart 
from either side edge of the test piece  13.3.2 (Bend test)  
Paint film  X X No scratch marks on the paint film  13.3.3 (pencil 
hardness test)  
Impact 
resistance  – X No peeling  13.3.4 (i mpact test)  
Adhesion  X – No irregularities on the tested portion  13.3.5 (c ross scori ng 
test) 
Flexibility  X X No peeling  Flexibility test  
Abrasion  X X No burnished appearance in rubbed 
area after 100 double rubs on both 
topcoat and wash coat.  13.3.6 (a brasion 
[MEK] test)  
 
8.2 Test items for sheets and coils for roofing and architectural  siding  shall be in accordance with Table 5.  
8.3 Paint adhesion and peeling shall be checked by applying standard filament tape.  
9 Dimensions  
9.1 The dimensions of sheets and coils shall be expressed  in millimetres . 
9.2 The standard nominal  thickness of s heets and coils shall be in accordance with EAS 11 and EAS 410.  
The minimum gauge for pre -painted metal coated steel sheets and coils is 30 Gauge . 
9.3 For corrugated steel sheets the dimensions shall be in accordance with EAS 11 and EAS 410.  
9.4 For trough ed steel sheets (for both domestic and industrial applications) the dimensions may be in 
accordance with Annex C. Other dimensions for new profiles may be produced as per agreement between the 
supplier and the purchaser.  
9.5 The mechanical properties for p re-painted steel sheets and coils shall be in accordance EAS 11 and EAS 
410. 
10 Paint coating (dry film thickness)  
10.1 Primer  
The purpose of the primer is to serve as the bond between the substrate and the topcoat and to offer added 
corrosion protection f or the entire system. The primer shall be compatible with the topcoat in order to ensure 
optimum properties of the coating system. For this reason, the primer is usually not specified by the purchaser 
but it is generally selected by the coating supplier or  pre-painted sheet producer for optimum compatibility.  DEAS 468:2023  
8 © EAC  2023 – All righ ts reserved  
 For building products, primer thickness shall be 5 µm with tolerance of ± 1 µm. High performance primers with 
films as thick as 75 µm with  tolerance  of ± 8 µm may be specified.  
10.2 Wash coat  
For build ing products, wash coat thickness shall be 8 µm with tolerance of ± 1 µm. 
10.3 Top coat 
10.3.1  Different top -coats shall be selected based on the performance or appearance requirements desired. 
For building products, top -coat thickness shall be 15 µm with tolerance of ± 5 µm. High-performance top -coats 
may be specified. Other upgraded systems may specify the application of two or more layers of top -coats.  
10.3.2  The top -coat shall be applied for the exposed side of the sheet. However,  the unexposed side may  
be ordered with t he same coating as the topside.  
10.3.3  A wash coat or backer  coat shall be applied to  the bottom side.  
NOTE  The selection of a top -coat depends on the performance parameters required such as chalking and fading, 
plus the corrosion resista nce needed, which shall take into account the severity of the service environment.  
11 Shapes  
11.1 Camber  
Maximum camber values for sheets and coils shall be as given in Table 6. 
Table 6 — Maximum camber values  
Dimensions in millimetres  
Width  Length  
Flat sheet /coil 
≤ 2 000 ˃ 2 000  
≤ 630 4 4 in any 2  000 of length  
˃ 630 2 2 in any 2  000 of length  
 
11.2 Squareness  
When measured in accordance with 11.2.1  the distance between diagonally opposite corners of the sheet 
shall not differ by more than 10 mm.  
11.2.1  Place e ach sheet in the sample in turn on a flat rigid surface. Measure to the nearest one millimetre the 
distance between the diagonally opposite corners of each sheet in the sample and record to the nearest 
millimetre any difference between the two measurements  on a sheet.  
 
 
11.3 Flatness  
11.3.1  Flatness for sheets shall be as given in Table 7. DEAS 468:2023  
© EAC 2023 – All rights reserved  9 
  
 
Table 7 — Flatness  
Dimensions in millimetres  
 
Width  Classification , max.  
Bow  Edge wave  Center buckle  
≤ 1 000 12 8 6 
1 000 ˂ x ≤1 250 15 10 8 
 
11.3.2  Flatness of sheets shall be determined as they are placed on a surface plate. The value shall be 
obtained by subtracting the sheet thickness from maximum deviation from the horizontal flat surface and the 
flatness shall be applied to the upper surface of the sheet.  
12 Appearance  
Sheets and coils shall be free from defects detrimental to practical use. However, in the case of coils, they 
may contain some minimal  imperfections, including welds and floating.  
13 Tests  
13.1 General  
The properties of the substrate and the organic coating system, combined with the method of forming, 
determine the life expectancy and general appearance of the final product. Each coating system has different 
qualities in regard to gl oss, flexibility, fading, chalking, and resistance to cracking at bends, abrasion 
resistance, dirt retention, and resistance to varying atmospheric conditions. All of these factors should be 
considered in any end application. The test methods used to measu re some of these parameters shall be in 
accordance with EAS 11 and EAS 410 . 
13.2 Endurance tests for coatings  
13.2.1  Salt spray test  
The salt spray test shall be done as follows:  
a) a test piece shall be 50 mm or more in width and 100 mm or more in length ; and 
b) the testing method shall comply with ISO 11997 -1. 
13.2.2  Accelerated weathering test  
The accelerated weathering test shall be as follows.  
a) a test piece shall be 50 mm or more in width and 100 mm  or more  in length ; and  
b) the testing method shall comply with the accelerated weathering test specified in ISO 15110.  DEAS 468:2023  
10 © EAC  2023 – All righ ts reserved  
 13.3 Tests for physical properties of paint coating  
13.3.1  Sampling of test specimens  
For corrugated sheets, test specimens shall be taken from flat sheets prior to corrugation.  
Specimens shall be tak en from products of the same quality, dime nsions, coating mass, and color.  
The sampling of test specimens for the T -bend, pencil hardness, impact, c ross-scoring and abrasion (MEK) 
tests shall comply with the following requirements : 
a) for continuously paint -coated coils or cut length from continuously paint -coated coils, one test 
specimen shall be taken from each 50 t or its fraction ; 
b) for sheets manufactured by paint -coating base metal cut to a specified length, one test specimen shall 
be taken from not more t han 3 000 sheets ; 
c)  
13.3.2  Bend test  
The bend test shall be as follows:  
a) The test piece shall have a width of 75  mm to 125 mm and  a length suited for the test. Unless 
otherwise specified, one test piece shall be cut out of each test specimen paralleled to th e rolling 
direction of the base metal.  
b) By referring to the internal  spacing of bend shown in Table 8, the test piece shall be bent manually as 
shown in Figure 1. 
 
 
Figure 1— Direction of bend test  
c) The bend test shall be applied to the symbols indicating coating masses covered in EAS 11 and EAS 
410. For sheets and coils using an alloyed type as base metal for paint coating, the above shall be 
used as reference only.  
d) For sheets and coils for roofing, architectural siding, and corrug ation, the internal spacing of bend 
shall be in accordanc e with that for, the relevant classified symbol in Table 8. 
DEAS 468:2023  
© EAC 2023 – All rights reserved  11 
 Table 8 — Internal spacing of bend  
Classified symbol  Bend angle  Nominal thickness , 
mm Internal spacing of bend  
CGCC 180 ≤ 0.40 2 sheets of nominal thickness  
CGCH – 0.40 ˂ x ≤ 1.6 3 sheets of nominal thickness  
CGCD 1  180 0.40 ≤ x ≤  1.6 2 sheets of nominal thickness  
0.40 ˂ x ≤ 0.40 3 sheets of nominal thickness  
CGC 400  180 ≤. 0.40  3 sheets of nominal thickness  
0.40 ˂ x ≤ 1.6 3 sheets of nominal thickness  
CGC 440  180 ≤ 0.40 4 sheets of nominal thickness  
0.40 ˂ x ≤ 1.6 5 sheets of nominal thickness  
 
13.3.3  Pencil hardness test  
The pencil ha rdness test shall be as follows:  
a) a pencil having the hardness symbols giv en in Table 9 and meeting the requirements of ISO 15184  
shall be used ; 
Table 9 — Symbols for pencil hardness  
Durability classification  Hardness symbol  
Class 1  H 
Class 2  H 
Class 3  F 
 
b) the pencil shall be sharpened so as to expose about 3 mm of lead. Whil e being held at right angles to 
an abrasive paper of No. 400 or finer which has been laid on a hard, flat surface, the point of the lead 
shall be made to draw a continuous circle gently and thus be ground down so as to obtain a flat 
surface with sharp edge s at the tip. The tip of the lead shall be ground flat for each test ; 
c) holding the prepared pencil at about 45 º to the surface of the test specimen, straight lines shall be 
drawn with it in the direction shown Figure 2, with the load being applied of about 10 N ; and  
d) the lines shall be not les s than 20 mm in length and not less than three in number.  
 
 
 
Figure 2 — Pencil hardness testing method  
DEAS 468:2023  
12 © EAC  2023 – All righ ts reserved  
 13.3.4  Impact test  
The impact test shall be as follows:  
a) a weight shall be dropped onto a test face from a Du Point t ype impact tester, as shown in Figure 3; 
b) the mass of the weight shall be 500  g ± 1 g, and the radius of the impact point shall be 6.35  mm ± 
0.03 mm ; and  
c) the weight shall be dropped from a height of 500 mm above the test piece.  
 
 
Figure 3 — Du Point Impact -deformation tester  
13.3.5  Cross -scoring test  
The scoring test shall be as follows:  
a) straight lines shall be scored with a safety razor blade or other pointed objects so as to reach the 
surface of the coating through the paint film and to form squares ; and  
b) eleven straight lines shall be scored crosswise at right angles, at intervals of 1 mm.  
13.3.6  Abrasion  – Methyl Ethyl Ketone  (MEK) test  
13.3.6.1  Apparatus  
The following apparatus and materials shall be used for the abrasion MEK test : 
a) test piece (100 mm x 2 00 mm) ; 
b) MEK ; 
c) cheese cloth ; 
DEAS 468:2023  
© EAC 2023 – All rights reserved  13 
 d) squeeze bottle ; and  
e) solvent resistant gloves . 
13.3.6.2  Procedure  
The abrasion test shall be done as follows:  
a) select an area of the coated surface to be tested. Clean the area with tap water and a dry cloth. Mark 
a section of the  cleaned area, measuring 150 mm by 25 mm with a solvent resistant marker, in which 
to perform the MEK double rubs ; and  
b) fold a 300 mm square piece of cheese cloth so that the thickness is doubled and saturate it until 
dripping wet with MEK. Place an index f inger in the center of the cheese cloth and gather the 
remaining cloth. With the index finger at a 45 ° angle to the surface, rub with moderate pressure over 
the marked area. Do not allow more than 10 s to elapse between wetting the cloth and beginning to 
rub the coating. Wet the cloth as often as needed without lifting it from the surface. One forward and 
backward motion constitutes one double rub. Do a control test adjacent to the MEK test area. Use 
only a dry clean cloth rubbed in the same manner as the o riginal test for the control test to establish 
the effects of the cloth on the coating.  
13.4 Cautions for testing  
The tests require the following cautions:  
a) since the durability and physical properties of sheets and coils are affected by environmental 
condi tions and by paint coating flaws incurred in handling, hair cracks on processed surfaces, etc., 
testing shall be conducted on flat sheets with normal surfaces ; and  
b) the temperature for tests on physical properties shall be from 5 ºC to 35 ºC. 
14 Inspection  
Inspection shall be as follows:  
a) the durability test is a performance test, and the test results shall comply with the requirements in 
Clause 6;  
b) the results of tests and inspection on the physical properties of paint coatings, dimensions, shape 
and appearan ce shall satisfy the requirements specified in Clauses 6 , 8, 9, 10, 11  and 12; and  
c) when part of the test results for physical properties fail to meet the requirements, a retest using 
double the number of test pieces taken from the same lot is permitted.  
15 Marking  
15.1 Reverse side marking  
15.1.1  For the sheets and coils which have passed inspection and the quality of which is guaranteed for one 
side only, the reverse side markings shall be as shown in Figure 5.  
For both -side guarantees, the sheets and coil s shall be marked only when so specified.  
15.1.2  Each sheet or coil shall be legibly and indelibly  marked.  DEAS 468:2023  
14 © EAC  2023 – All righ ts reserved  
 15.1. 2.1 For roofing , the fol lowing shall be indicated:  
a) manufacturer’s name  and/or trade name ;  
b) base metal thickness expressed in gauge with word ―GA UGE in full and millimetres;  
c) batch number ; 
d) designation of the substrate ; and  
e) paint coating clas s. 
15.1. 2.2 For other than roofing the following items may be indicated, upon agreement between the purchaser  
and the manufacturer : 
a) manufacturer’s name  or trade name ; 
b) base metal thickness expressed in gauge with word ―GAUGE in full and millimetres;  
c) classified symbol (including shape symbol for corrugated sheets) ; 
d) batch number ; and  
e) designation of the substrate . 
15.2 Package marking  
Where s heets and coils are packed , each  package shall be legibly and indelibly  marked with the following  
information:  
a) manufacturer’s name  and/or trade name ; 
b) classified symbol (including shape symbol for profiled sheets) ; 
c) name of colour ; 
d) symbol indicating coating mass ; 
e) dimensions ; and  
f) number of sheets or mass where applicable . 
15.3 Non-conforming sheets  
All non -conforming sheets shall be identified by cutting off all four corners at least by 75 mm along the edges  
diagonally and shall be marked ―Rejected with indelible ink.  
16 Storage, transportation and fabrication  
16.1  Cautionary measures for storage, transportation, and fabrication shall be supplied with every sale in 
accordance with 16.2 to 16.4.  
16.2  For the storage of sheets and coils, selection of a well -ventilated indoor place virtually free from dust 
and moisture should be specified. Mixed loading with corrosive substances such as chemicals should be 
avoided.  DEAS 468:2023  
© EAC 2023 – All rights reserved  15 
 16.3  Every precaution should be taken against paint coating damage and contact with water during 
transportation and transfer.  
16.4  The f ormability of paint coatings deteriorates with the descent of temperature. When sheets and coils 
stored in a low -temperature warehouse are to be fabricated, the temp erature of the material should be 
elevated to normal temperature.  
16.5 The indication of sheets and coils shall normally be made in terms of classified symbol, symbol for 
guaranteed side(s), symbol for surface protective treatments, symbol indicating coati ng mass, name of colour, 
and dimensions, as given in Figure 4 (a, b, c, d). 
Figure 4 a) — For sheet  
 
Figure 4 b) — For coil  
DEAS 468:2023  
16 © EAC  2023 – All righ ts reserved  
  
Figure 4 c) — For roofing (coil)  
 
Figure 4 d) — For corrugated sheet using commercial, hard  
 
 
 
 
 
 
 
 
 
 
 
DEAS 468:2023  
© EAC 2023 – All rights reserved  17 
 Annex  A 
(informative)  
 
Examples of indications for types of sheets and coils  
Examples of indications for types of sheets  and coils are given as follows:  
 CGCC -20 
Pre-painted hot -dip zinc -coated steel sheets and coils, commercial, Class 2, one -side guaranteed  
 CGCCR -22 
Pre-painted h ot-dip zinc -coated steel sheets and coils for roofing, using Commercial Quality, Class 2, 
both-side guaranteed  
 CGC 400 -32 
Pre-painted hot -dip zinc -coated steel sheets and coil, structural, Class 3 (Class 2 for reverse side), 
both-side guaranteed  
 CGCCR -20 W2  
Corrugated steel sheets for roofing of pre -painted hot -dip zinc -coated steel sheets and coils, using 
Commercial Quality, Class 2, one -side guaranteed  DEAS 468:2023  
18 © EAC  2023 – All righ ts reserved  
 Annex B 
(informative)  
 
Ordering information  
B.1 The coated flat sheet covered by this standard  is produced on continuous lines to decimal thickness 
only. The thickness of the sheet includes the base steel and the metallic coating. The thickness of the organic 
system is in addition to the substrate (base steel and metallic coating).  
B.2 Orders for m aterial under this specification should include the following information, as applicable, to 
describe the required product adequately:  
a) product  name (pre -painted steel sheet);  
b) designation of substrate, (including quality designation and grade, if required ; 
c) metallic coating type and weight ; 
d) organic coating system designation ; 
e) dry organic film thickness top side and bottom side (the top side typically consists of a primer and 
topcoat and the bottom side a primer and a wash coat; however the bottom side may be ordered to 
the same quality as the top side) ; 
f) protection required (waxed or strippable coating) ; 
g) dimensions (thickness, width, either flat or formed (overall or cover) and length (if cut length) and, if 
applicable, type of formed configuration ; 
h) coil size r equirement: maximum outside diameter, acceptable inside diameter, and maximum weight 
(mass) ; 
i) cut length requirement maximum lift weight (mass) ; 
j) special requirements, if any ; and 
k) application (part identification and description).  
. 
 
 DEAS 468:2023  
© EAC 2023 – All rights reserved  19 
 Annex C 
(informative)  
 
Profile Dimensions  for Troughed Sheets  
The dimensions of troughed sheets should comply with the following requirements listed in figures below. 
Other dimensions may be produced as agreed between the manufacturer and the purchaser.  
 
  
 
 
 
 DEAS 468:2023  
20 © EAC  2023 – All righ ts reserved  
 
 
 
 
 
 
 DEAS 468:2023  
© EAC 2023 – All rights reserved  21 
 
 
 
 
 
 DEAS 468:202 3   
 
© EAC 2023 – All rights reserved  
  
 Bibliography  
[1] JIS G 3302:2010 , Hot-dip zinc -coated steel sheet and  strip 
[2] TZS 1475:2017, Sheet roof and wall covering – Aluminium alloy corrugated and troughed sheet