Maraging 250 (UNS K92890)

Maraging 250 is an age hardenable iron-nickel steel alloy melted as VIM + VAR with ultra high strength and toughness. This alloy is easily machinable in the annealed condition prior to final heat treatment. This grade has improved fracture toughness from Maraging 300 but slightly less strength. The unique properties makes it suitable for many critical aerospace applications.

Equivalent Grades

TrademarkGBGOSTASTMUNSDINW.Nr.NFBSJISSS
Maraging 250
C250
K92890X1NiCoMo18-8-5

Chemical Composition, %

AlloyCSiMnPSCrNiCoMoAlTiCuFe
Maraging 250≤0.03≤0.10≤0.10≤0.01≤0.01≤0.5017.0-19.07.0-8.54.6-5.20.05-0.150.3-0.5≤0.50Bal

Typical Physical and Mechanical Properties (RT, Annealed+Aged)

Density, g/cm3Melting Point, ℃Tensile Strength, MPaYield Strength, MPaELongation, %Hardness, HRB
8.01350-14501865172512/

Available Products and Specifications

Rod, Bar, Wire and ForgingsASTM A 538, AMS 6512
Plate, Sheet and Strip
Pipe and Tube
Welding Product
Others

Features

  • Excellent Mechanical Properties
  • Excellent Workability

Applications

Commercial applications for this engineering material include:

  • Missile casings
  • Tooling
  • Ordnance mounting blocks
  • High performance
  • Autosport components
  • CouplingsJet engine and helicopter drive shafts
  • Load cells