Chemical Composition for ASTM A193 Grade B8
Find typical requirement for ASTM A193 Grade B8 Chemical Composition with allowable variation. Chemical analysis of finished products manufactured to ASTM A193 Grade B8 specification must comply with below requirement. This typical composition is equivalent to AISI 304/304L stainless steel used as a raw material to produce B8 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 | 18.00 – 20.00 % | +/- 0.20 |
| Nickel | 8.00 – 11.00 % | +/- 0.15 |