Chemical Properties %
                               Â
C, max. |
Mn |
P, max |
S, max |
Si, min |
Cr, max |
Cu, max |
Mo, max |
Ni, max |
V, max |
|
Grade A * |
0.25 |
0.27 - 0.93 |
0.035 |
0.035 |
0.10 |
0.40 |
0.40 |
0.15 |
0.40 |
0.08 |
Grade B |
0.30 |
0.29 - 1.06 |
0.035 |
0.035 |
0.10 |
0.40 |
0.40 |
0.15 |
0.40 |
0.08 |
Grade C |
0.35 |
0.29 - 1.06 |
0.035 |
0.035 |
0.10 |
0.40 |
0.40 |
0.15 |
0.40 |
0.08 |
Mechanical Properties                               Â
                                                                    Grade A         Grade B         Grade C
Tensile strength, min, psi (MPa) Â Â Â Â Â Â Â Â Â Â Â Â Â Â 48,000 (330) Â Â Â 60000 (415) Â Â Â 70,000 (485)
Yield strength, min, psi (MPa) Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â 30,000 (205)Â Â Â 35,000 (240)Â Â Â 40,000 (275)