8620 Steel (AMS 6274 / AMS 2301)
Grade 8620 is a hardenable chromium, molybdenum, nickel low alloy steel often used for carburizing to develop a case-hardened part. This case-hardening will result in good wear characteristics (good strength and toughness properties). Machining is done prior to carburizing to within as close a tolerance as possible. Finish machining or grinding after heat treatment and/or carburizing, should be at a minimum so as not to impair the hardened case of the part.
| FOR REQUIREMENTS: | Carburizing Stainless Steel |
| MELT PRACTICE: | Air-melt |
| TYPICAL SPECS: | ASTM A534 / AMS 6274 |
| TYPICAL TEMP LIMIT: | 250°F (121°C) |
| SPECIFICATIONS: | Our 8620 tubing stock is typically certified for aircraft and bearing quality (AQ/ BQ) ASTM A534 AMS 6274 AMS 2301 Military Specification MIL-S-8690 has been replaced by AMS 6274 UNS : G86200 |
Typical Applications
- Automotive and Engine Production industries
- Camshafts, Crankshafts
- Fasteners
- Gears, gear rings
- King Pins, Piston Pins
Chemical Composition
| C | Si | Mn | S | Cu | 0 | Cr | Mo | P | Al | Ni | |
|---|---|---|---|---|---|---|---|---|---|---|---|
| min. | 0.17 | 0.15 | 0.60 | – | – | – | 0.35 | 0.15 | – | – | 0.35 |
| max. | 0.23 | 0.35 | 0.95 | 0.015 | 0.30 | 0.0020 | 0.65 | 0.25 | 0.025 | 0.050 | 0.75 |
Size Ranges
| Type | OD | |
|---|---|---|
| 8620 Tube OD Ranges | Cold Drawn, Roto-rocked or Hot Rolled | 1.772″- 10.500″ |
| 8620 Bar Diameter Ranges | Cold Drawn, Rough Turned, or Hot Rolled | 0.500″ – 6.000″ |
