Maraging 250 Alloy Steel

Topics Covered

Chemical Composition
Physical Properties
Mechanical Properties
Thermal Properties
Other Designations


In comparison with carbon steels, alloy steels are a lot more responsive to mechanical and heat treatments. Alloy steels can be used in specific melting and deoxidization processes for particular applications.

The following datasheet provides an overview of maraging 250 alloy steel.

Chemical Composition

The chemical composition of maraging 250 alloy steel is outlined in the following table.

Element Content (%)
Iron, Fe 68
Nickel, Ni 18.5
Cobalt, Co 7.5
Molybdenum, Mo 4.8
Titanium, Ti 0.4
Aluminum, Al 0.1
Silicon, Si ≤ 0.10
Manganese, Mn ≤ 0.10
Carbon, C ≤ 0.030
Phosphorous, P ≤ 0.010
Sulfur, S ≤ 0.010
Zirconium, Zr 0.01
Boron, B 0.003

Physical Properties

The following table shows the physical properties of maraging 250 alloy steel.

Properties Metric Imperial
Density 8.00 g/cc 0.289 lb/in³

Mechanical Properties

The mechanical properties of annealed maraging 250 alloy steel are displayed in the following table.

Properties Metric Imperial
Tensile strength 965 MPa 140000 psi
Yield strength (@strain 0.200 %) 655 MPa 95000 psi
Bulk modulus (typical for steel) 140 GPa 20300 ksi
Shear modulus (estimated from elastic modulus) 73.0 GPa 10600 ksi
Elastic modulus 190 GPa 27600 ksi
Poisson's ratio (calculated) 0.3 0.3
Elongation at break (in gage length of 4.5 times the square root of area) 17.00% 17.00%
Reduction of area 75.00% 75.00%
Hardness, Brinell (converted from Rockwell C hardness) 290 290
Hardness, Knoop (converted from Rockwell C hardness) 311 311
Hardness, Rockwell C 30 30
Hardness, Vickers (converted from Rockwell hardness) 301 301

Thermal Properties

The thermal properties of maraging 250 alloy steel are given in the following table.

Properties Metric Imperial
Thermal conductivity (20°C) 25.3 W/mK 176 BTU in/hr.ft².°F

Other Designations

Equivalent material to maraging 250 alloy steel include DIN 1.6358


The applications of maraging 250 alloy steel are given in the following table.


  1. Debojyoti Mazumdar Debojyoti Mazumdar India says:

    I would like to know the temperature vs resistivity plot for steel m250

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