8620 Round Bar: Material Profile
8620 is widely used for carburized components that must resist surface wear while absorbing impact and shock.
Its low carbon content supports machining before heat treatment, while alloy additions improve toughness and hardenability.
Purchase to the controlling ASTM, SAE, AMS, or customer specification. Section size, supply condition, mechanical properties, surface limits, testing, and heat/lot traceability can change the acceptable material and processing route.
Key Characteristics
- Excellent case-hardening response
- Tough, ductile core
- Good machinability
- Good wear and impact resistance
Common Applications
- Gears and pinions
- Bushings and sleeves
- Shafts and arbors
- Bearings and heavy-machinery components
Typical Chemical Range
| Element | Weight % |
|---|---|
| Carbon | 0.18–0.23 |
| Manganese | 0.70–0.90 |
| Silicon | 0.15–0.35 |
| Nickel | 0.40–0.70 |
| Chromium | 0.40–0.60 |
| Molybdenum | 0.15–0.25 |
| Phosphorus (max) | 0.035 |
| Sulfur (max) | 0.040 |
Chemistry ranges are general reference values. The purchase specification and material certification govern the order.
