Alloy Steel 8630
Material Data Sheet
Alloy steel 8630 is a low-alloy steel containing nickel, chromium, and molybdenum as alloying elements. The alloy has good hardenability, and good strength and toughness properties.
Chemical Composition
| Chemistry | Content(%) |
|---|---|
| Iron, Fe | 96.745 – 98.02 |
| Manganese, Mn | 0.65 – 0.95 |
| Chromium, Cr | 0.4 – 0.6 |
| Nickel, Ni | 0.35 – 0.75 |
| Carbon, C | 0.28 – 0.33 |
| Silicon, Si | 0.15 – 0.30 |
| Molybdenum, Mo | 0.15 – 0.25 |
| Sulfur, S | ≤ 0.04 |
| Nickel, Ni | 0.35 – 0.75 |
| Phosphorous, P | 0.035 |
Physical Properties
| Properties | Metric | Imperial |
|---|---|---|
| Density | 7.85 g/cm³ | 0.284 lb/in³ |
Mechanical Properties
| Properties | Metric | Imperial |
|---|---|---|
| Tensile Strength | 620 MPa | 89900 psi |
| Yield Strength | 550 MPa | 79800 psi |
| Fatigue Strength | 315 MPa | 45700 psi |
| Bulk Modulus | 140 GPa | 20300 ksi |
| Shear Modulus | 72.0 GPa | 10400 ksi |
| Elastic Modulus | 190 – 210 GPa | 27557 – 30458 ksi |
| Poisson’s Ratio | 0.27 – 3.0 | 0.27 – 3.0 |
| Elongation at Break | 16% | 16% |
| Hardness, Knoop | 230 | 230 |
| Hardness, Rockwell C | 15 | 15 |
| Hardness, Vickers | 217 | 217 |
| Machinability | 70 | 70 |
Applications
Alloy Steel 8630 is used in the following application areas:
- Oil-patch applications ( connectors, hangers and block valves)
- Gears
- Pins
- Shafts
- Camshafts
- Drive wheels
- Clutch plates
