Forgings, Fasteners, Boltings, Stud Bolts, Screws, Nuts
| Composition, % | Element | |||||
|---|---|---|---|---|---|---|
| C, max | Mn, max | P, max | S, max | Si, max | Cu, min, when copper is specified | |
| Grades 50 [345] and 55 [380] | 0.27 | 1.35 | 0.04 | 0.05 | 0.40 | 0.20 |
| Grade | ||||
|---|---|---|---|---|
| ASTM A529 Grade 50 [345] | ASTM A529 Grade 55 [380] | |||
| ksi | [MPa] | ksi | [MPa] | |
| Tensile strength, min | 70B | [485] | 70 | [485] |
| Tensile strength, max | 100 | [690] | 100 | [690] |
| Yield strength, min | 50 | [345] | 55 | [380] |
| Elongation in 8 in. [200 mm],min, % | 18 | 17 | ||
| Elongation in 2 in. [50 mm], min, % | 21 | 20 | ||
| S5 | Charpy V-Notch Impact Test. |
|---|---|
| S32 | Single Heat Bundles |
| S78 | Maximum Carbon Equivalent |
| S79 | Maximum Tensile Strength |