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Maraging 250 | Maraging 250 Steel

Shapes Available

  • Round Bar


  • Aerospace
  • Manufacturing
  • Medical
  • Nuclear
  • Oil Refining

Industry Names

  • Maraging 250
  • C 250


  • Exotic
  • Specialty Steel


  • AMS 6512
  • ASTM A579 grade 72
  • MIL-S-46850
  • UNS K92890


  • Aircraft Wing Components and Forging
  • Bearings
  • Bolts
  • Couplings
  • Fan Shafts In Commercial Jet Engines
  • Helicopter Drive Shafts
  • Rocket motor and Missile cases
  • Transmission Shafts


  • Excellent Notch Durability

Maraging 250 is a tough, relatively soft and therefore readily machined and formed. Full properties achieved through martensitic precipitation aging.  Full Maraging 250 is part of the 18% Nickel Maraging Steel family alongside Maraging 200 and Maraging 300. When taking into consideration Maraging steels, even though some of them contain Cobalt and some Titanium as their strengthening alloy, one must remember that their physical properties are similar. So similar are they that the number in the grade name (250 in this case) corresponds, relatively, not 100% but in most cases, to the tensile strength with most other properties the same.

Usually furnished in the annealed condition Maraging 250 is relatively soft and easy to machine. However after heat treating  and via precipitation hardening the hardness increases greatly which makes this steel sufficient for tooling applications.

Maraging Steel 250 is available in Round Bar in AMS 6512 and MIL-S-46850.


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.

Metal Properties
.2% Yield Strength 255 ksi
Elongation 11 %
Ultimate Tensile Strength 260 ksi
Chemical Composition
Al- .1
B- .003
C- .03
Co- 7.5
Mn- .1
Mo- 4.8
Ni- 18.5
P- .03
S- .01
Si- .1
T- .4
Zr- .01

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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