Alloy Steel AISI 4142 Forgings
4142, G41420
Alloy steels comprise a spectrum of steels whose compositions include the elements Ni, Si, Va, C, Mo, Cr, Mn, and B which have been fixed for carbon steels. These steels are more responsive to mechanical and heat treatments than carbon steels.
Alloy Steel AISI 4142 Forgings Properties
UNS G41420 Forgings Chemical Requirements
| Element | Fe | Cr | Mn | C | Si | Mo | S | P |
|---|---|---|---|---|---|---|---|---|
| Content (%) | ≥ 96.725 | 0.80-1.10 | 0.75-1.10 | 0.40-0.45 | 0.15-0.30 | 0.15-0.25 | ≤ 0.040 | ≤ 0.035 |
UNS G41420 Forgings Mechanical Requirements
| Properties | Metric | Imperial |
|---|---|---|
| Elastic modulus | 190-210 GPa | 27557-30458 ksi |
| Bulk modulus (typical for steel) | 140 GPa | 20300 ksi |
| Shear modulus (typical for steel) | 80 GPa | 11600 ksi |
| Poisson’s ratio | 0.27-0.30 | 0.27-0.30 |
| Hardness, Brinell (annealed and cold drawn) | 187-229 | 187-229 |
| Hardness, Knoop (converted from Brinell hardness) | 230 | 230 |
| Hardness, Rockwell B (converted from Brinell hardness) | 94 | 94 |
| Hardness, Rockwell C (converted from Brinell hardness, value below normal HRC range, for comparison purposes only) | 15 | 15 |
| Hardness, Vickers (converted from Brinell hardness) | 218 | 218 |
| Machinability (annealed and cold drawn, based AISI 1212 steel, as on 100 machinability) | 65 | 65 |