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4140 Steel

Shapes Available

  • Flat Bar
  • Hex Bar
  • Plate
  • Round Bar
  • Tubing


  • Aerospace
  • Manufacturing

Industry Names

  • 4140 Cond Annealed
  • 4140 Pre-Hardened
  • 4140 HT
  • 4140 Hot Roll
  • 4140 HR
  • 4140 Condition C
  • Alloy 4140


  • Cold Finished and Alloy


  • AISI 4140
  • AMS 6362 (Round Bar)
  • AMS 6381 (Tubing)
  • UNS G41400


  • Bearings
  • Cylinders
  • Gears
  • Hydraulic Shafts
  • Nuts and Bolts


  • Good General Machinability

4140 steel is a Chrome - Moly alloy that contains chromium and molybdenum as strengthening agents. It offers a strong balance of strength, toughness and wear resistance.

Please contact us to request a quote. We specialize in hard to find material.

We work closely with many manufacturers in the aerospace & defense industry. We work with NADCAP approved heat treaters and testing laboratories. We can supply DFARS compliant material.

Chemical Composition
C0.38 0.43
Cr0.80 1.1
Mn0.7 1.00
Mo0.15 0.25
P- 0.035
S- 0.04
Si0.15 0.30

DISCLAIMER: The information provided on this Web site, technical or otherwise, is merely for informational purposes, and is not intended to serve as a guide, manual, instructions, or any kind reference for proper safety procedures or material purchasing. Michlin Metals makes no warranty, express or implied, based on the statements on this Web site and, as such, will not be liable for any damages, either direct or indirect, including but not limited to consequential damages, such as damages for loss of profits, that may arise based on reliance on the information provided on this Web site. Some information has been referenced from reliable industry sources. Tradenames listed are the sole property of the tradename owners. Michlin Metals typically provides branded products through its relationships with mills and authorized re-sellers. Equivalent non-branded product is sometimes also available through certified sources of such products. Michlin Metals will never substitute non-branded product when branded product is requested.

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