ﻟﺣﺩﻳﺩ ﺍﻟﺗﺳﻠﻳﺢ )ﻗﺿﺑﺎﻥ ﺍﻟﺻﻠﺏ ﺍﻟﻛﺭﺑﻭﻧﻲ(ﺍﻻﺷﺗﺭﺍﻁﺎﺕ ﺍﻟﻔﻧﻳﺔ  
 
Technical Requirements for Conc rete Reinforcement Steel Bars  
 
 
 
 
  
 
   
 
   
 
 1. Scope 
This document specifies requirements for deformed carbon steel bars in cut lengths for 
reinforcement of concrete.  
 This document does not cover the plain steel bars, wieldable re inforcement steel, steel wires, 
meshes, coils, de-coiled products  and bars, produced by re-roll ing finished product.  
 
The steel grades covered are:  
 
• B500A, B500B and B500C in accordan ce with the latest version of  the British standard BS 
4449. 
• Grade 80 in accordance with the latest version of the American standard ASTM A615. 
 
Important Notes:  
• Other grades or sizes require sp ecial approval from Materials E ngineering Directorate 
“MED”. 
• Lower grades are not allowe d under any circumstance. 
 
 
2. Physical Requirements 
 
2.1 Nominal Sizes 
 The bar sizes shall be as follows:  
Standard Bar Size/ De signation 
BS 4449  8, 10, 12, 16, 20,  25, 32, 40, 50 
ASTM A615 10, 13, 16, 22, 25, 32, 43, 57,64  
 
2.2 Nominal Cross Sectiona l Area and Mass per Meter 
 
The values for the nominal cross sectional area shall be as giv en below: 
 
BS 4449 
Nominal size (mm) 
(Diameter in (mm)) Cross sectional area (mm2) Mass per meter run (kg) 
8 50.3 0.395 
10 78.5 0.617 
12 113 0.888 
16 201 1.58 
20 314 2.47 
25 491 3.85 
32 804 6.31 
40 1257 9.86 
50 1963 15.4 
   
 
  ASTM A615 
 
Bar Designation Nominal size (mm) 
(Diameter in (mm)) Cross sectional area 
(mm2) Mass per meter run 
(kg) 
10 9.5 71 0.560 
13 12.7 129 0.994 
16 15.9 199 1.552 
22 22.2 387 3.042 
25 25.4 510 3.973 
32 32.3 819 6.404 
43 43.0 1452 11.38 
57 57.3 2581 20.24 
64 63.5 3167 24.84 
 
2.3 Deformation Limits 
 The values for the spac ing, height and rib inclination of trans verse ribs shall be within the following 
ranges. 
 
BS 4449 
Rib height Rib spacing Rib inclination 
0.03d to 0.15d 0.4d to 1.2d 35° to 75° 
 
ASTM A615 
Bar Designation Maximum Average 
Spacing (mm) Minimum Average 
Height (mm) Maximum Gap (mm) 
10 6.7 0.38 3.6 
13 8.9 0.51 4.9 
16 11.1 0.71 6.1 
22 15.5 1.12 8.5 
25 17.8 1.27 9.7 
32 22.6 1.63 12.4 
43 30.1 2.16 16.5 
57 40.1 2.59 21.9 
64 44.5 2.86 24.3 
 
2.4 Tolerance 
 
The permissible deviation from n ominal mass per meter shall be not more than ±4.5 % on nominal 
diameters greater than 8 mm, and ±6.0 % on nominal diameters le ss than or equal to 8 mm.  
Hint: the above as per the latest version of the British standa rd BS 4449 
 
3. Mechanical Requirements 
 
3.1 Tensile requirements 
 
BS 4449 
 Yield Strength 
(N/mm2) Tensile/Yield Strength 
Ratio Total Elongation at 
Maximum Force (%) 
B500A 500 1.05 2.5 
B500B 500 1.08 5.0 
B500C 500 ≥1.15, <1.35 7.5  
ASTM A615 
 
 Grade 80 
Tensile Strength (N/mm2) 725 
Yield Strength (N/mm2) 550 
Total Elongation at Maximum Force (%) 
Bar Designation 
10 7 
13, 16 7 
22, 25 7 
32 6 
43, 57, 64 6 
 
3.2 Bend Performance 
 The bend-test specimen shall withstand being bent around a pin without cracking on the outside 
radius of the bent portion. The requirements for degree of bend ing and sizes of pins are as follows: 
 
BS 4449 
Nominal Diameter, 
mm Maximum pin Diameter Bending Degree 
≤16 4d 90o/20o 
>16 7d 90o/20o 
 
ASTM A615 
Bar Designation Grade 80 
Specimen Nominal 
Diameter  Test Bends 
10, 13, 16 5 d 180o 
22, 25 5 d 180o 
32 7 d 180o 
43, 57 9 d 90o 
64 10 d 90 o 
 
 
4. Chemical Requirements 
 
4.1 BS 4449 
 The values of individual elements and the carbon equivalent sha ll not exceed the limits below: 
 
 Carbon Sulphur Phosphorus Nitrogen Copper Carbon 
Equivalent 
Cast 
Analysis 0.22  0.05  0.05  0.012  0.80  0.50 
Product 
Analysis 0.24  0.055  0.055  0.014  0.85  0.52 
 
    4.2 ASTM A615 
 
• The percentages of carbon, manga nese, phosphorus, and sulfur sh all be determined. The 
phosphorus content thus determi ned shall not exceed 0.06 %. 
• For phosphorus, made by the purch aser shall not exceed that spe cified in 6.1 by more than 
25 %. 
  
5. Marking 
 5.1 BS 4449  
 
• Each reinforcing steel shall bear on one rib row, a mark identi fying the works. This mark shall 
be repeated at an interval of not more than 1.5 m. 
• The mark shall consis t of the following: 
a) A symbol denoting the beginning of the mark;  
b) A numerical system identifying the manufacturer, consisting of the country of origin and 
the works number. 
5.2 ASTM A615 
 
Each reinforcing steel bar shall be tagged for grade and shall be identified by a distinguishing set of 
marks legibly rolled onto the sur face of one side  of the bar to  denote in the following order: 
• Point of Origin. 
• Size Designation. 
• Grade of Steel. 
• Minimum Yield Strength. 
 
6. Labeling 
 
Each bundle shall carry a label or a tag as mentioned in Annex (1) 
 
Annex (1): Concrete Reinforcement Steel Bars 
 
Manufacture Name or 
Trade Mark -  اﺳﻢ اﻟﻤﺼﻨﻊ أو اﻟﻌﻼﻣﺔ اﻟﺘﺠﺎر
Country of Origin - ᗷ 
Applicable Standard -  اﻟﻤﻮاﺻﻔﺔ اﻟﻤﻄ
Steel Grade -  درﺟﺔ اﻟﺼﻼ 
Size (mm) -  اﻟﻤﻘﺎس )ﻣﻢ
No. of Bars -  اﻟ 
Bundle No. -  رﻗﻢ اﻟ 
Production Date -  ﺗﺎر
Length (m) -  اﻟﻄﻮل )م
Nominal Weight (kg) -  اﻟﻮزن اﻹﺳ