AISI 4118
Alloy steels contain elements such as chromium, cobalt, nickel. They comprise a wide range of steels with compositions that exceed the limitations of Si, Va, Cr, Ni, Mo, Mn, B and C allocated for carbon steels. Alloy steels are used in specific melting and deoxidization processes for particular kind of applications. When compared to carbon steels, alloy steels are a lot more responsive to mechanical and heat treatments.
| Element | Content(%) |
|---|---|
| Iron, Fe | 97.7-98.49 |
| Manganese, Mn | 0.70-0.90 |
| Chromium, Cr | 0.40-0.60 |
| Carbon, C | 0.18-0.230 |
| Silicon, Si | 0.15-0.35 |
| Molybdenum, Mo | 0.080-0.15 |
| Sulfur, S | 0.040 |
| Phosphorous, P | 0.035 |
| Properties | Metric | Imperial |
|---|---|---|
| Tensile strength | 517 MPa | 75000 psi |
| Yield strength | 365 MPa | 52900 psi |
| Bulk modulus (typical for steel) | 140 GPa | 20300 ksi |
| Shear modulus (typical for steel) | 80.0 GPa | 11600 ksi |
| Elastic modulus | 190-210 GPa | 27557-30458 ksi |
| Poisson's ratio | 0.27-0.30 | 0.27-0.30 |
| Elongation at break (in 50 mm) | 33.00% | 33.00% |
| Reduction of area | 63.70% | 63.70% |
| Hardness, Brinell | 137 | 137 |
| Hardness, Knoop (converted from Brinell hardness) | 156 | 156 |
| Hardness, Rockwell B (converted from Brinell hardness) | 75 | 75 |
| Hardness, Vickers (converted from Brinell hardness) | 143 | 143 |
| Machinability (hot rolled and cold drawn, based on 100 machinability for AISI 1212 steel) | 60 | 60 |
Sheets / Plates
| Production Route | Hot Rolled, Cold Rolled |
| Material Standard | AISI, ASTM, ASME, DIN, BS, EN, ISO, JIS, GOST, SAE, IS & Custom Chemistry |
| Size | Width from 100mm to 3000mm ; Length from 500mm to 12000mm |
| Thickness | 0.1mm to 400mm |
| Delivery Condition | As Rolled, Annealed, Quenched and Tempered, Normalized |
| Surface Finish | Plain, Brushed, Cladded |