8620 — ASTM A311
CTI Color-Brown
The most widely used carburizing alloy. The well balanced alloy content of this grade permits hardening to produce a string, tough core and high case hardness. Additionally 8620 has good welding characteristics.
Chemistry | ||
| Carbon | 0.38/0.43 | |
| Manganese | 0.75/1.00 | |
| Phosphorus (Max.) | 0.035 | |
| Sulfur (Max.) | 0.04 | |
| Silicon | 0.15/0.35 | |
| Chromium | 0.80/1.10 | |
| Molybdenum | 0.15/0.25 | |
Typical Mechanical Properties | ||
| Tensile Strength | 95,000 psi | |
| Yield Strength | 80,000 psi | |
| Elongation in 2” | 15% | |
| Reduction of Area | 50% | |
| Brinell Hardness | 200 | |
Machinability
65% of 1212
Applications
Highly stressed parts, or parts subject to severe wear.