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Military Specification MIL-S-8690 has been replaced by AMS 6274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

  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″

> Our Current Stock Summary


Design by Dragonfly Interactive, Jersey City, NJ