Hot Rolled Ribbed Steel Bars for Construction and Weld-Mesh  
   
GB1499-1998 Grade and Chemical Composition
Grade
Chemical Composition
C
Si
Mn
P
S
Ceq
HRB335
0.17-0.25
0.4-0.80
1.20-1.60
≤0.045
≤0.045
≤0.52
HRB400
0.17-0.25
0.2-0.80
1.20-1.60
≤0.045
≤0.045
≤0.54
HRB500
≤0.25
≤0.8
≤1.6
≤0.045
≤0.045
≤0.55

Mechanical properties
Grade
Nominal diametre
os,MPa
ob,MPa
5,%
HRB335
6-25 28-50
335
490
16
HRB400
6-25 28-50
400
570
14
HRB500
6-25 28-50
500
630
12

Comparison Table for area and weight of deformed steel bar

Nominal diametre,mm
Nominal area ,mm2
Weight,kg/m
6
28.27
0.222
8
50.27
0.395
10
78.54
0.617
12
133.1
0.888
14
153.9
1.21
16
201.1
1.58
18
254.5
2.00
20
314.2
2.47
22
380.1
2.98
25
490.9
3.85
28
615.8
4.83
32
804.2
6.31
36
1018
7.99
40
1257
9.87
50
1964
15.42
Density=7.85g/cm3