UNS K92890（Maraging C250)

Maraging C250

Maraging C250 Material grades and equivalents：BS S162/ UNS K92890/ UNS K92940/ WS 1.6359

Maraging steel is produced by vacuum arc re-melting to provide a lower impurity level and high strength. Maraging 250 in the aged condition boasts more than 250 ksi tensile (1723 MPa) with similar yield results, a nominal 11% elongation and an above average level of toughness. The alloy retains its strength up to 450°C and good notch impact is maintained down to minus 50°C and below. This material may be nitrided.

Maraging 250 is usually supplied in the annealed condition where the microstructure consists of fine martensite before final heat treatment. It is then maraged (precipitation hardened) to achieve final properties, employing a relatively low temperature that results in the required combination of high strength and toughness. The alloy has a density of 8.02 g/cc. 

Maraging steels are exceptionally stable during both annealing and aging, offering predictable, uniform shrinkage on all dimensions. This distortion-free (nonwarping) characteristic is a significant advantage over many other high-strength steels. The essential difference between the C-type and T-type maraging steels is the chemical analysis. In terms of mechanical properties and recommended processing there are few, if any, significant differences. Nickel, rather than carbon, is the principle element in maraging steels, which are essentially carbon-free.

Chemical composition:

Mechanical properties:

Characteristic as below：

• Maraging C250 is the lowest strength of the maraging steels.

• Processing conditions and application:

• Typical usage is in jet engine shafts, missile casings, ordinance mounting blocks and tooling.