DRAFT EAST AFRICAN STANDARD  
 
 
DEAS 412 -1:2018 - Steel for the reinforcement of concrete —Part 
1: Plain  bars  
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
EAST AFRICAN COMMUNITY  
 
 
 
   
   
                                                                                             
  
 
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          DEAS 412 -1:2018  
    
                                                                                                                                              
 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 th at 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 mandat ed 
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 Stan dards 
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 Standa rds 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 Te chnical Committee EASC /TC 035 TC Steel and Steel Products  
 
 
  
  
          DEAS 412 -1:2018  
    
                                                                                                                                              
  
 
 
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 nam es 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   
          DEAS 412 -1:2018  
    
                                                                                                                                              
  
 
 
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 representat ive 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 procedur e, 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 v alue in some circumstances.  
 
 
 
  
          DEAS 412 -1:2018  
    
                                                                                                                                              
  
 
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 A5 
 
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 de livery 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 +100
0 mm. 
 
Table 2 — Dimensions, mass per unit length and permissible deviations   
 Nominal bar  Nominal cross -  Mass per unit length  
 
diameter  sectional area a    
  
Requirement b Permissible  
   
d An  
    deviation c 
   mm mm2  kg/m  % 
   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        
        
a A n = 0,785 4 × d2   
       
b Mass per unit length = 7,85 × 10−3 × An   
c Permissible deviation refers to a single bar.   
        
 
 
 
 
 
 
 
 
 
 
 
 
 
   
          DEAS 412 -1:2018  
    
                                                                                                                                              
  
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 d eviation of the product analysis relative to the cast analysis as specified in Table 3 are given 
in Table 4.  
 
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 c omposition 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 c ast  
   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 prop erties  
  
          DEAS 412 -1:2018  
    
                                                                                                                                              
 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 i s (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, resp ectively. 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.  
 
Table 5 — Tensile properties   
   Speci fied 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 va lue    
 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 co rrected vision.   
          DEAS 412 -1:2018  
    
                                                                                                                                              
  
 
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, 
depending on the bar diameter.  
 
For determination of ten sile 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 specif ied in 
Table 6.  
 
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 Internation al 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 -1:2018 ; 
 
c) nominal diameter, in millimetres, according to Tab le 1; 
 
d) steel grade.  
 
 
   
          DEAS 412 -1:2018  
    
                                                                                                                                              
  
 
10 Marking  
 
10.1 Each bar and each bundle shall be legibly and indelibly marked as follows;  
 
10.2 Each bar  shall be marked  with manufacturers name or logo, steel grade and nominal diameter  
 
10.3 Each  bundle shall be marked with manufacturers name or logo, steel grade, nominal diameter and batch 
/cast number . 
 
10.4 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 reinforcem ent 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 sha ll 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 sc heme 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 tha t 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 chem ical 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 . 
 
 
  
          DEAS 412 -1:2018  
    
                                                                                                                                              
 
 
 
 
11.3.2.3  Evaluation of the results  
 
11.3.2.3.1  Inspection by variables  
 
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 f rom 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 req uirements, 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. Th e test unit complies with the requirements, if not more than 2 of the 60 results do not conform to 
the conditions.  
 
   
© EAC 2018   First  Edition 2018  
  
 
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 eac h bar diameter.  
 
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 prop erties defined in Clauses 6 and 7, and a confirmation that the other requirements of 
this part of DEAS 412 -1:2018  are fulfilled.  
 
11.3.4 Test report  
 
The test report shall contain the following information:  
 
a) designation of the reinforcing steel in accordan ce 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 results.