Find typical requirement for ASTM A194 Grade 7 Chemical Composition with allowable variation. Chemical analysis of finished products manufactured to ASTM A194 Grade 7 specification must comply with below requirement. This typical composition is in line with the AISI 4140 / AISI 4142 alloy steel used as a raw material to produce B7 bolts, studs and other external threaded fasteners.
Element |
Ferritic Steel |
|---|---|
| Chromium Molybdenum Alloy Steel | |
| CompositionA, % | |
| Carbon | 0.37 - 0.49 |
| Manganese | 0.65 - 1.10 |
| Phosphorus | 0.035 max |
| Sulfur | 0.04 max |
| Silicon | 0.15 - 0.35 |
| Chromium | 0.75 - 1.20 |
| Molybdenum | 0.15 - 0.25 |