PUBLIC REVIEW DRAFT DRAFT UGANDA STANDARD  
  DUS DEAS 412 -1 
Second  Edition  
2018-mm-dd 
 
 Reference number  
DUS DEAS 412 -1: 2018 
© UNBS 2018 
   
Steel for the reinforcement of concrete — Part 1: Plain bars  
 
 PUBLIC REVIEW DRAFTDUS DEAS 412-1: 2018  
ii                © UNBS  2018 - All rights reserved 
 Compliance with this standard does not, of itself confer immunity from legal obligations  
A Uganda Standard does not purport to include all necessary provisions of a contract. Users are 
responsible for its correct application  
© UNB S 2018 
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilised in any 
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permission from UNBS. 
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 PUBLIC REVIEW DRAFTDUS DEAS 412-1 : 2018  
© UNBS  2018 - All rights reserved                iii National foreword 
Uganda National Bureau of Standards (UNBS) is a parastatal under the Ministry of Trade, Industry and 
Cooperatives established under Cap 327, of the Laws of Uganda, as amended.  UNBS is mandated to co-
ordinate the elaboration of standards and is  
(a) a member of International Organisation for Standardisation (ISO) and  
(b) a contact point for the WHO/FAO Codex Alimentarius Commission on Food Standards, and  
(c) the National Enquiry Point on TBT Agreement of the World Trade Organisation (WTO). 
The work of preparing Uganda Standards is carried out through Technical Committees. A Technical 
Committee is established to deliberate on standards in a given field or area and consists of representatives of 
consumers, traders, academicians, manufacturers, government and other stakeholders. 
Draft Uganda Standards adopted by the Technical Committee are widely circulated to stakeholders and the 
general public for comments. The committee reviews the comments before recommending the draft standards 
for approval and declaration as Uganda Standards by the National Standards Council.  
This Draft Uganda Standard, DUS DEAS 412-1:2018 , Steel for the reinforcement of concrete —Part 1: Plain 
bars, is identical with and has been reproduced from an East African Standard, EAS 4 12-1:2018, Steel for the 
reinforcement of concrete —Part 1: Plain bars , and is being proposed for adoption as a Uganda Standard. 
This standard was developed by Mechanical engineering and metallurgy Standards Technical Committee 
(UNBS/TC 4).  
This second edition cancels and replaces the first edition (US EAS 4 12-1:2013), which has been technically 
revised.  
Wherever the words, “ East African Standard " appear, they should be replaced by "Uganda Standard." PUBLIC REVIEW DRAFT   
   
                                                                                            DEAS 412-1 
 
 
 
 
 
 
 
 
DRAFT EAST AFRICAN STANDARD 
 
 
DEAS 412-1:2018- Steel for the reinforcement of concrete —Part 
1: Plain bars 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
EAST AFRICAN COMMUNITY 
 
 
PUBLIC REVIEW DRAFT   
   
                                                                                            DEAS 412-1 
 
 
 
Copyright notice 
This EAC document is copyright-protected by EAC. While the reproduction of this document by 
participants in the EAC standards development process is permitted without prior permission from EAC, 
neither this document nor any extract from it may be reproduced, stored or transmitted in any form for 
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Requests for permission to reproduce this document for the purpose of selling it should be addressed as 
shown below or to EAC’s member body in the country  of the requester: 
© East African Community 2016  — All rights reserved 
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Reproduction for sales purposes may be subject to royalty payments or a licensing agreement. Violators 
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 DEAS 412-1 
                                                                                                                                                 
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 barriers that are encountered when goods and services are exchanged within 
the Community will be removed.  
In order to achieve this objective, the Community established an East African Standards Committee mandated 
to develop and issue East African Standards.  
The Committee is composed of representatives of the National Standards Bodies in Partner States, together 
with the representatives from the private sectors and consumer organizations. Draft East African Standards are 
circulated to stakeholders through the National Standards Bodies in the Partner States. The comments received 
are discussed and incorporated before finalization of standards, in accordance with the procedures of the 
Community. 
East African Standards are subject to review, to keep pace with technological advances. Users of the East 
African Standards are therefore expected to ensure that they always have the latest versions of the standards 
they are implementing.  
DEAS 412-1:2018 was prepared by Technical Committee EASC/ TC 035 TC Steel and Steel Products  
 PUBLIC REVIEW DRAFT 
           
 DEAS 412-1 
                                                                                                                                                 
EAST AFRICA DRAFT STANDARD  
 
 
 
Steel for the reinforcement of concrete —Part 1: Plain bars 
 
 
 
1 Scope 
 
This part of East Africa Draft Standard specifies technical requirements for plain bars to be used as 
reinforcement in  non- structural concrete. 
 
This part of East Africa Draft Standard covers nine steel grades not intended for welding which are B240A-P, 
B240B-P, B240C-P, B240D-P, B300A- P, B300B-P, B300C-P, B300D-P and B420D-P, and one steel grade 
intended for welding which is B420DWP. The production process is at the discretion of the manufacturer. It also 
applies to plain bars supplied in coil form. The requirements of this part of ISO 6935 apply to straightened 
product. The steel grades are designated with steel names allocated in accordance with ISO/TS 4949. 
 
NOTE The first “B” stands  for steel for reinforcing concrete. The next 3 digits represent the specified characteristic value of 
upper yield strength. The fifth letter stands for ductility class (4.4). The next symbol relates to welding; “ -” means not intended 
for welding and “W” means intended for welding. The last “P” stands for plain bar.  
 
This part of East Africa Draft Standard covers products delivered in straight lengths. 
 
Plain bars produced from finished products, such as plates and railway rails, are excluded. 
 
 
2 Normative references 
 
The following referenced documents are indispensable for the application of this document. For dated 
references, only the edition cited applies. For undated references, the latest edition of the referenced document 
(including any amendments) applies. 
 
ISO 404, Steel and steel products — General technical delivery requirements 
 
ISO/TS 4949, Steel names based on letter symbols 
 
ISO/TR 9769, Steel and iron — Review of available methods of analysis 
 
ISO 10144, Certification scheme for steel bars and wires for the reinforcement of concrete structures 
 
ISO 14284, Steel and iron — Sampling and preparation of samples for the determination of chemical 
composition 
 
ISO 15630- 1, Steel for the reinforcement of concrete and prestressing of concrete — Test methods — Part 
1:Reinforcing bars, wire rod and wire PUBLIC REVIEW DRAFT 
           
 DEAS 412-1 
                                                                                                                                                 
 
 
 
3 Symbols 
 
The symbols used in this part of East Africa Draft Standard are listed in Table 1. 
 
Table 1 — Symbols  
Symbol  Unit Description  Reference  
    
A5 % Percentage elongation after fracture  7.1, 8.1  
A
gt % Percentage total elongation at maximum force  7.1, 8.1  
An mm2 Nominal cross -sectional area  Clause 5, 8.1  
d mm Nominal diameter of the bar  Clause 5, 8.1, 8.2,  
   Clause 9  
    
fk — Required characteristic value  11.3.2.3.1  
k, k′ — Indices  11.3.2.3.1  
    
mn — Mean value of n individual values  11.3.2.3.1  
n — Number of individual values  11.3.2.3.1  
    
R
eH N/mm2 Upper yield strength  7.1 
Rm N/mm2 Tensile strength  7.1 
R
p0,2 N/mm2 0,2 % proof strength, non-proportional extension  7.1 
sn — Standard deviation for n individual values  11.3.2.3.1  
xi — Individual value  11.3.2.3.1  
 
 
 
4 Terms and definitions 
 
For the purposes of this document, the following terms and definitions apply. 
 
4.1  
cast analysis  
chemical analysis representative of the cast determined by the steelmaker in accordance with own 
procedures 
 
 
 
4.2  
certification scheme  
certification system as related to specified products, processes or services to which the same particular 
standards and rules, and the same procedure, apply 
 
4.3  
characteristic value 
value having a prescribed probability of not being attained in a hypothetical unlimited test series 
 
 
NOTE 1  Equivalent to fractile, which is defined in ISO 3534-1.  
 
NOTE 2  A nominal value is used as the characteristic value in some circumstances. 
 
4.4  
ductility class  
classification of the ductility properties of reinforcing steels based on the value of the ratio of tensile strength to 
yield strength, as well as the elongation measured either as Agt or as A 5 PUBLIC REVIEW DRAFT 
           
 DEAS 412-1 
                                                                                                                                                 
 
NOTE  See Table 5. 
 
4.5  
product analysis  
chemical analysis carried out on the product 
(ISO 16020:2005) 
 
5 Dimensions, masses per unit length and permissible deviations 
 
Dimensions, mass per unit length and permissible deviations are given in Table 2 . The delivery length of  
straight bars  shall be 6 m or 12 m for  the general market , However manufacturer and purchase r  may agree 
on  special ordered lengths upon  notification to the regulator , permissible deviation on delivery length from 
rolling mill shall be +1000 mm. 
 
Table 2 — Dimensions, mass per unit length and permissible deviations  
Nominal bar  Nominal 
cross - Mass per unit length  
diameter  
d 
mm sectional 
area a 
An 
mm2
 Requirement 
b 
kg/m  Permissible  
deviation c
 
%  
6 28,3 0,222    6 
8 50,3 0,395   6 
10 78,5 0,617   5 
12 113 0,888   5 
14 154 1,21  5 
16 201 1,58  5 
20 314 2,47  5 
22 380 2,98  5 
An= 0,785 4 × d2 
Mass per unit length = 7,85 × 10−3 × An 
Permissible deviation refers to a single bar.  
 
6 Chemical composition 
 
The chemical composition of the steel, as determined by cast analysis, shall conform to Table 3. 
 
The carbon equivalent, CEV, is calculated according to the following formula. 
 
CEV  C Mn (Cr  V  Mo) (Cu  Ni) (1) 6 5 15     
 
where C, Mn, Cr, V, Mo, Cu and Ni are the mass fractions, expressed as percentages, of the respective chemical 
elements of the steel. 
 
The permissible deviation of the product analysis relative to the cast analysis as specified in Table 3 are given 
in Table 4. 
 
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 DEAS 412-1 
                                                                                                                                                 
Table 3 —  Chemical composition based on cast analysis —  
Maximum values of mass fractions, in percentage  
Steel grade  C Si Mn P S N CEV a 
B240A -P        
B240B -P        
B240C -P — — — 0,060  0,060  — — 
B300A -P 
       
B300B -P        
B300C -P        
        
B240D -P — — — 0,050  0,050  — — 
B300D -P 
       
        
B420D -P 0,30 0,55 1,50 0,040  0,040  0,012  0,56 
B420DWP b 
       
a Other CEV formulae and values may be used by agreement between the manufacturer and purchaser.   
b Alloy elements, such as Cu, Ni, Cr, Mo, V, Nb, Ti and Zr, may be added by agreement between the manufacturer 
and purchaser.  
Table 4 — Chemical composition based on product analysis —  
Permissible deviation of the product analysis in percentage by mass  
 Elements  Specified maximum value  Permissible deviation in   
  in cast analysis in Table 3  product analysis from the   
   specified limits of the cast   
   analysis in  Table 3   
  % %  
     
 C  0,25 + 0,03   
     
 Si u 0,60  + 0,05   
     
 Mn u 1,65  + 0,06   
     
 
P u 0,05  + 0,008   
    
 
 0,05 + 0,010   
   
     
 
S u 0,05  + 0,008   
    
 
 0,05 + 0,010   
   
 
 
7 Mechanical properties 
 
7.1Tensile properties 
 
The tensile test shall be performed in accordance with 8.1. 
 
The material shall conform to the requirements for tensile properties specified in Table 5. 
 
In the context of this part of DEAS   412-1, the characteristic value is (unless otherwise indicated) the lower or 
upper limit of the statistical tolerance interval at which there is a 90 % probability (1 − α = 0,90) that 95 % ( p = 
0,95) of the values are at or above this lower limit, or are at or below this upper limit, respectively. This definition 
refers to the long-term quality level of production. 
 
By agreement between the manufacturer and purchaser, the values shown in Table 5 may be used as specified 
minimum and/or maximum values. 
 
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 DEAS 412-1 
                                                                                                                                                 
Table 5 — Tensile properties  
   Specified  Specified  Ductility properties   
   characteristic value  characteristic      
    
Specified     of upper yield  value of   
   strength  tensile  
Specified  characteristic value  
Ductility  Steel grade     strength  of elongation a 
    characteristic value     
 class    R
eH Rm of Rm/ReH    
    N/mm2 N/mm2  %  
   Minimum  Maximum  Maximum  Minimum  A
5  A
gt 
   Minimum   Minimum           
           
 
A B240A -P 240  — 
— 1,02 20  
2        
 
B300A -P 300  
— 16  
       
           
 
B B240B -P 240  — — 1,08 20  5  
B300B -P 300  
—  
16  
       
           
 C B240C -P 240  — — 1,15 20  7  
B300C -P 300  
—  
16  
       
           
  B240D -P 240  — 520  22   
           
 
D B300D -P 300  — 600 
1,25 19  
8         
 B420D -P 
420  
540 — 16  
      
       
  
B420DWP      
          
           
a By agreement between the manufacturer and purchaser, the type of elongation shall be selected between A5 and Agt. If the type of  
 
elongation is not specified by agreement, Agt should be used.       
 
If a yield phenomenon is not present, the 0,2 % proof strength ( Rp0,2) shall be determined. 
 
7.2 Bending properties 
 
After testing in accordance with 8.2, the bar shall show neither rupture nor cracks visible to a person of 
normal or corrected vision. 
 
 
8 Testing 
 
8.1 Tensile test 
 
The tensile test shall be carried out in accordance with ISO 15630-1.  
For the determination of percentage elongation after fracture, A5, the original gauge length shall be 5 times the 
nominal diameter.  
For the determination of percentage total elongation at maximum force, Agt, equidistant marks shall be made 
on the free length of the test piece. The distance between the marks shall be 20 mm, 10 mm or 5 mm, dependin g 
on the bar diameter. 
 
For determination of tensile properties, the nominal cross-sectional area of the bar shall be used. 
 
8.2 Bend test 
 
The bend test shall be carried out in accordance with ISO 15630- 1. 
 
The test piece shall be bent to an angle between 160° and 180° over a mandrel of the diameter specified in 
Table 6. PUBLIC REVIEW DRAFT 
           
 DEAS 412-1 
                                                                                                                                                 
 
Table 6 — Mandrel diameter to be used for the bend test  
  Dimensions in millimetres  
   
 Nominal diameter  
Mandrel diameter (max.)a b  d 
  
   
 u 16 3d 
   
 16 d u 22 6d 
   
a By agreement between the manufacturer and purchaser, larger mandrel diameters may be used.  
b For nominal diameters,  larger than 22 mm, the mandrel diameters in bend tests shall be agreed between the  
manufacturer and purchaser.   
   
 
8.3 Chemical analysis 
 
In general, the chemical composition is determined by spectrometric methods. 
 
In case of dispute about the analytical method, the chemical composition shall be determined by an 
appropriate referee method specified in one of the International Standards. 
 
 
9 Designation 
 
Plain bars according to this part of East Africa Draft Standard shall be designated in the following order: 
 
a) reinforcing steel; 
 
b) a reference to this part of DEAS 412-1; 
 
c) nominal diameter, in millimetres, according to Table 1; 
 
d) steel grade. 
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© EAC 2016  First Edition 2016  
  
 
10 Marking 
 
Each bar and each bundle shall be legibly and indelibly marked as follows; 
 
Each bar shall be marked with manufacturers name or logo, steel grade and nominal diameter 
 
Each bundle shall be marked with manufacturers name or logo, steel grade, nominal diameter and batch / cast 
number. 
Special orders bars in addition to the above marking shall bear the marking SP.  
 
11 Evaluation of conformity 
 
11.1 General 
 
Certification and inspection of reinforcement shall be performed 
 
9.1 in accordance with a certification scheme monitored by an external body, or 
 
9.2 according to acceptance testing of a specific delivery. 
 
11.2 Certification scheme 
 
In the case of a certification scheme, certification and inspection shall be performed in accordance with ISO 
10144. 
 
11.3 Acceptance testing of a specific delivery 
 
11.3.1 General 
 
Provisions regarding the nature, extent and evaluation of acceptance testing on deliveries of reinforcing steel 
not subject to a certification scheme are given in 11.3.2 and 11.3.3. 
 
Acceptance testing of a specific delivery shall be performed according to 11.3.2. 
 
By agreement between the manufacturer and purchaser, 11.3.3 may be used. 
 
11.3.2 Verification of characteristic values 
 
11.3.2.1 Organization 
 
The tests shall be organized and carried out according to an agreement between the purchaser and 
manufacturer, taking into consideration the national rules of the receiving country. 
 
11.3.2.2 Extent of sampling and testing 
 
For the purpose of testing, the delivery shall be subdivided into test units with a maximum mass of 50 t or a 
fraction thereof. Each test unit shall consist of products of the same steel grade and the same nominal diameter 
from the same cast. The manufacturer shall confirm in the test report that all samples in the test unit originate 
from the same cast. The chemical composition (cast analysis) shall be stated in this test report. 
 
Test pieces shall be taken from each test unit as follows: 
 
9.4 two test pieces from various bars, for testing the chemical composition (product analysis); 
 
9.5 a minimum of 15 test pieces (if appropriate, 60 test pieces, see 11.3.2.3.1) from various bars for testing all 
other properties specified in this part of East Africa Draft Standard. 
 
11.3.2.3 Evaluation of the results 
 
11.3.2.3.1 Inspection by variables PUBLIC REVIEW DRAFT  
© EAC 2016  First Edition 2016  
 
 
For properties, which are specified as characteristic values, the following shall be determined:  
c) all individual values xi of the 15 test pieces ( n = 15); 
 
d) the mean value m15 (for n = 15); 
 
e) the standard deviation s15 (for n = 15). 
 
The test unit corresponds to the requirements, if the condition stated below is fulfilled for all properties:  
m15−2,33×  s15Wƒk (2) 
 
where  
fk is the specified characteristic value; 
 
2,33  is the value for the acceptability index k for n = 15 for a failure rate of 5 % ( p = 0,95) at a probability of 
90 % (1 − α = 0,90). 
 
s  = ∑( xi − m15 )2 
(3) 
15  14      
If the condition stated above is not fulfilled, the index   
k ′ =  m15−ƒk  (4) 
   
    s
15   
is determined from the test results available. Where k′ W 2, testing can be continued. In this case, 45 further test 
pieces shall be taken and tested from different bars in the test unit, so that a total of 60 test results are available 
(n = 60). 
 
The test unit shall be considered to comply with the requirements, if the condition stated below is fulfilled for all 
properties:  
m 60−1,93×  s 60>ƒk (5) 
 
where 1,93 is the value for the acceptability index k for n = 60 for a failure rate of 5 % ( p = 0,95) at a probability 
of 90 % (1 − α = 0,90).  
 
11.3.2.3.2  Inspection by attributes 
 
When testing, properties are specified as maximum or minimum values, all results determined on the 15 test 
pieces shall comply with the requirements of the product standard. In this case, the test unit shall be considered 
to comply with the requirements. 
 
The tests may be continued when at most 2 results not conforming to the conditions occur. In this case, 45 
further test pieces from various bars in the test unit shall be tested, so that a total of 60 test results are available. 
The test unit complies with the requirements, if not more than 2 of the 60 results do not conform to the conditions. 
 
11.3.2.3.3  Chemical composition 
 
Both test pieces shall comply with the requirements in this part of East Africa Draft Standard. 
 
11.3.3 Verification of specified minimum/maximum values 
 
Tests shall be carried out according to the following. 
 
a) Bars of the same cast shall constitute one group. For every 50 t or fraction thereof, one tensile test and one 
bend test shall be carried out for each bar diameter. 
 PUBLIC REVIEW DRAFT  
© EAC 2016  First Edition 2016  
 b) Each individual test result shall meet the required values in Table 4, and the required bending properties 
in 7.2. 
 
c) One cast analysis shall be carried out for every cast to verify chemical composition (Clause 6). Samples 
shall be taken in accordance with ISO 14284. 
 
d) If any test result does not meet the requirements, retests may be carried out, according to ISO 404. 
 
e) The manufacturer shall submit a test report stating that the products of the delivery satisfy the chemical and 
mechanical properties defined in Clauses 6 and 7, and a confirmation that the other requirements of this 
part of DEAS 412-1 are fulfilled. 
 
11.3.4 Test report 
 
The test report shall contain the following information: 
 
a) designation of the reinforcing steel in accordance with this part of East Africa Draft Standard; 
 
b) marking details (on the tag, painting, etc.); 
 
c) date of testing; 
 
d) mass of the test unit; 
 
e) test