November 2, 2018

8620 Bar & Tube


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Military Specification MIL-S-8690 has been replaced by AMS 6274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

CSiMnSCu0CrMoPAlNi
min.0.170.150.600.350.150.35
max.0.230.350.950.0150.300.00200.650.250.0250.0500.75

Size Ranges

 TypeOD
8620 Tube OD RangesCold Drawn, Roto-rocked or Hot Rolled1.772″- 10.500″
8620 Bar Diameter RangesCold Drawn, Rough Turned, or Hot Rolled0.625″ – 6.000″

> Our Current Stock Summary


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