8620
AISI 8620 is a low-alloy nickel-chromium-molybdenum steel commonly used for carburised components. It provides a tough core with a hard, wear-resistant surface after heat treatment.
Typical applications include gears, pinions, camshafts, and heavy-duty mechanical components.
Specifications
- UNS: 688200
- ASTM A29, A322
- EN/DIN: 1.6523
- Structure: Low Alloy Steel (Case Hardening)
- Condition Supplied: Anncaled/Carbunised
Data Tables
Chemical Composition:
| C | Mn | P | S | Si | Cr | Ni | Ti | Mo | N | Cu | Fe | Co | Nb (+Ta) | V | W | Al | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Min | 0.18 | 0.7 | 0.15 | 0.4 | 0.4 | 0.15 | |||||||||||
| Max | 0.23 | 0.9 | 0.035 | 0.04 | 0.35 | 0.6 | 0.7 | 0.25 | Bal |
Mechanical Properties:
| Material Grade | ASTM Standard | Desgnation(EN /UNS) | Yield Strength (MPa) | Yield Strength (KSI) | Tensile Strength (MPa) | Tensile Strength (KSI) | Elongation (%) | Reduction of Area (%) | Hardness(HRC/HBWMax) | Condition | |
|---|---|---|---|---|---|---|---|---|---|---|---|
| AISI 8620 | ASTM A29 | EN 1.6523(G86200) | 350 | 50.7633 | 750 | 108.7785 | 20 | 45 | 353 HBW | Annealed |
Physical Properties:
| Material Grade | Density (g/cm³) | Melting Range (°C) | Modulus of Elasticity (GPa) | Thermal Conductivity (W/m·K) | Thermal Expansion (×10⁻⁶ /°C) | Electrical Resistivity (µΩ·m) | Magnetic Behavior |
|---|---|---|---|---|---|---|---|
| AISI 8620 | 7.85 | 1420 | 205 | 46 | 12 | 0.2 | Magnetic |
Key Features
- Excellent core toughness after carburising
- Hard and wear-resistant surface achievable
- Good machinability prior to heat treatment
- Good fatigue strength
- Suitable for case-hardening applications
Applications
- Gears and pinions
- Camshafts and crankshafts
- Automotive transmission components
- Heavy-duty mechanical parts
- Wear-resistant components