Available Size,NB(mm)

Chemical composition :

C = 0.26 % Max, Mn = 1.20 % Max, S = 0.030 % Max,  P = 0.030 % Max, Cu ≤  0.50%, Ni≤ 0.50%,Cr ≤ 0.50% and Mo≤0.15% , Unless otherwise agreed, Nb + V ≤ 0.06% , Nb+V+Ti ≤ 0.15 %, No deliberate addition of B is permitted and the residual B ≤0.001%.

Physical properties (Minimum):

Ultimate tensile strength : 42.33 kgf/mm², Yield strength : 25.0 kgf/mm²,

Elongation : 30 % on a test specimen of 2̋ gauge length   & 0.13 sq. inch cross-section.

200,150,100,

80,50,40,32,

25,20

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410 HB,

As per

Bureau Veritas Standard , NR216

Chemical composition :

C = 0.21 % Max, Mn = 0.4-1.2 % , S = 0.040 % Max,  P = 0.040 % Max, Si=0.35 % Max, Cu ≤  0.25%, Ni≤ 0.30%,Cr ≤ 0.25% and Mo≤0.10% , Nb=0.05 % max and V=0.10 % max .

Physical properties (Minimum):

Ultimate tensile strength : 41.83 kgf/mm², Yield strength : 26.02 kgf/mm²,

Elongation : 22 % 

200,150,100,

80,65,50,40,

32,25,20,15

'A' Class

as per BS-1387 & BDS-1031

All Type of process water,pnumatic &

continious flow piping works.Also used for structural works.

Chemical composition : C = 0.17-0.25%, Mn = 0.95-1.20%, S = 0.06 % Max,  P = 0.06 % Max,

Physical properties (Minimum):

Ultimate tensile strength: 32 kg/mm², Yield strength: 19.2 kg/mm², Elongation : 21 % on a test specimen of 2” gauge length   & 0.13 sq. inch cross-section,

100,80,65,

50,40,32,25,

20,15

'A' Class

as per BS-1387, BDS-1031 & BS 729

Chemical composition : C = 0.17-0.25%, Mn = 0.95-1.20%, S = 0.06 % Max,  P = 0.06 % Max,

Physical properties (Minimum):

Ultimate tensile strength: 32 kg/mm², Yield strength: 19.2 kg/mm², Elongation : 21 % on a test specimen of 2” gauge length   & 0.13 sq. inch cross-section,

100,80,65,

50,40,32,25,

20,15