Chemical Composition for ASTM A193 Grade B8M
Find typical requirement for ASTM A193 Grade B8M Chemical Composition with allowable variation. Chemical analysis of finished products manufactured to ASTM A193 Grade B8M specification must comply with below requirement. This typical composition is equivalent to AISI 316/316L stainless steel used as a raw material to produce B8M bolts, studs and other external threaded fasteners.
| Elements | Range | Allowed Variation, % |
| Carbon, max | 0.08 % | + 0.01 |
| Manganese, max | 2.00 % | + 0.04 |
| Phosphorus, max | 0.045 % | + 0.010 |
| Sulfur, max | 0.030 % | + 0.005 |
| Silicon, max | 1.00 % | + 0.05 |
| Chromium | 16.00 – 18.00 % | +/- 0.20 |
| Nickel | 10.00 – 14.00 % | +/- 0.15 |
| Molybdenum | 2.00 – 3.00 % | +/- 0.10 |