Alloy Steel 4320
Material Data Sheet
AISI 4320 alloy steel has high toughness and strength. It contains low carbon content to achieve good welding characteristics.
Chemical Composition
| Chemistry | Content(%) |
|---|---|
| Iron, Fe | 95.855 – 96.98 |
| Nickel, Ni | 1.65 – 2.00 |
| Manganese, Mn | 0.45 – 0.65 |
| Chromium, Cr | 0.40 – 0.60 |
| Molybdenum, Mo | 0.20 – 0.30 |
| Carbon, C | 0.17 – 0.22 |
| Silicon, Si | 0.15 – 0.30 |
| Sulfur, S | 0.04 |
| Phosphorous, P | 0.035 |
Physical Properties
| Properties | Metric | Imperial |
|---|---|---|
| Density | 7.85 g/cm³ | 0.284 lb/in³ |
| Melting Point | 1422 °C | 2590 °F |
Mechanical Properties
| Properties | Metric | Imperial |
|---|---|---|
| Tensile Strength | 580 MPa | 84100 psi |
| Yield Strength | 425 MPa | 61600 psi |
| Bulk Modulus | 140 GPa | 20300 ksi |
| Shear Modulus | 80 GPa | 11600 ksi |
| Elastic Modulus | 190 – 210 GPa | 27557 – 30458 ksi |
| Poissons Ratio | 0.27 – 0.30 | 0.27 – 0.30 |
| Elongation at Break | 29% | 29% |
| Reduction of Area | 58% | 58% |
| Hardness, Brinell | 163 | 163 |
| Hardness, Knoop | 184 | 184 |
| Hardness, Rockwell B | 84 | 84 |
| Hardness, Vickers | 170 | 170 |
| Machinability | 60 | 60 |
