Heavy hex nuts
ASTM A194 8 — chemistry & properties
ASTM A194 8 (Heavy hex nuts, UNS S30400): chemical composition and mechanical properties. Nuts for A193 B8 studs
Chemical composition (wt %)
| C | ≤ 0.08 |
| Mn | ≤ 2 |
| P | ≤ 0.045 |
| S | ≤ 0.03 |
| Si | ≤ 1 |
| Cr | 18 – 20 |
| Ni | 8 – 11 |
Mechanical properties
| Hardness | 126–300 HBW |