Alloy Steel 4130
Material Data Sheet
AISI 4130 is a low alloy steel containing molybdenum and chromium as strengthening agents. The carbon content is nominally 0.30% and with this relatively low carbon content, the alloy is excellent from the fusion weldability standpoint. The alloy can be hardened by heat treatment.
Chemical Composition
| Chemistry | Content(%) |
|---|---|
| Iron, Fe | 97.03 – 98.22 |
| Chromium, Cr | 0.8 – 1.1 |
| Manganese, Mn | 0.40 – 0.60 |
| Carbon, C | 0.28 – 0.33 |
| Silicon, Si | 0.15 – 0.30 |
| Molybdenum, Mo | 0.15 – 0.25 |
| Sulfur, S | 0.04 |
| Phosphorous, P | 0.035 |
Physical Properties
| Properties | Metric | Imperial |
|---|---|---|
| Density | 7.85 g/cm³ | 0.284 lb/in³ |
| Melting Point | 1432 °C | 2610 °F |
Mechanical Properties
| Properties | Metric | Imperial |
|---|---|---|
| Tensile Strength, Ultimate | 560 MPa | 81200 psi |
| Tensile Stregth, Yield | 460 MPa | 66700 psi |
| Modulus of Elasticity | 190 – 210 GPa | 27557 – 30458 ksi |
| Bulk Modulus | 140 GPa | 20300 ksi |
| Shear Modulus | 80 GPa | 11600 ksi |
| Poissons Ratio | 0.27 – 0.33 | 0.27 – 0.33 |
| Elongation at Break | 21.50% | 21.50% |
| Reduction of Area | 59.6% | 59.6% |
| Hardness, Brinell | 217 | 217 |
| Hardness, Knoop | 240 | 240 |
| Hardness, Rockwell B | 95 | 95 |
| Hardness, Rockwell C | 17 | 17 |
| Hardness, Vickers | 288 | 288 |
| Maciniability | 70 | 70 |
Applications
Alloy Steel 4140 is used in the following application areas:
- Manufacturing equipment for bearings, vehicle parts, and gears
- Rock crushing machinery
- Resistance welding products
- Drill bits and taps
- Mills and cutters
