AISI E4340
Alloy steels contain elements such as chromium, cobalt, nickel etc. In comparison with carbon steels, alloy steels are a lot more responsive to mechanical and heat treatments. Alloy steels comprise a wide range of steels whose compositions exceed the limitations of Si, Va, Cr, Ni, Mo, Mn, B and C allocated for carbon steels. These steels can be subjected to unique melting and deoxidization processes for specific kind of applications.
| Element | Content(%) |
|---|---|
| Iron, Fe | 95.175-96.27 |
| Nickel, Ni | 1.65-2.00 |
| Chromium, Cr | 0.700-0.900 |
| Manganese, Mn | 0.650-0.850 |
| Carbon, C | 0.380-0.430 |
| Molybdenum, Mo | 0.200-0.300 |
| Silicon, Si | 0.150-0.300 |
| Phosphorous, P | ≤ 0.0250 |
| Sulfur, S | ≤ 0.0200 |
| Properties | Metric | Imperial |
|---|---|---|
| Tensile strength | 745 MPa | 108000 psi |
| Yield strength | 470 MPa | 68200 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) | 22.00% | 22.00% |
| Reduction of area | 50.00% | 50.00% |
| Hardness, Brinell | 217 | 217 |
| Hardness, Knoop (converted from Brinell hardness) | 240 | 240 |
| Hardness, Rockwell B (converted from Brinell hardness) | 95 | 95 |
| Hardness, Rockwell C (converted from Brinell hardness, value below normal HRC range, for comparison purposes only) | 17 | 17 |
| Hardness, Vickers (converted from Brinell hardness) | 228 | 228 |
| Machinability (annealed and cold drawn. Based on 100 machinability for AISI 1212 steel) | 50 | 50 |
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 |