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4150 Steel

Shapes Available

  • Round Bar


  • Aerospace
  • Manufacturing
  • Oil Refining

Industry Names

  • 4150 H
  • 4150
  • 4150 Annealed
  • 4150 H Band


  • Cold Finished and Alloy


  • AMS 2301
  • ASTM A322
  • ASTM A331
  • ASTM A505
  • MIL-S-11595
  • UNS G41500


  • Aircraft Applications
  • Axles
  • Bolts
  • Shafts
  • Valves


  • Adequate Toughness
  • Good Machinability
  • High Resistance to Impact

4150 steel is resulphurized with a modified chemistry of this medium carbon alloy steel that provides deeper hardenability. The addition of sulphur along with a Calcium treatment results in improved machinability.

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
C0.48 0.53
Cr0.80 1.00
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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