Product & Technology

High-hardness, soft-magnetic stainless steel

Our precipitation hardened ferritic stainless steel is the first in the world to be mass-produced, which defies the conventional wisdom that soft-magnetic stainless steels are also mechanically soft.


  • High hardness makes it remarkably wear-resistant. Which means that hard Cr coating and other surface hardening treatment can be omitted.
  • This has a high mechanical strength.
  • It offers superior magnetic properties. One of the best quality soft-magnetic stainless steels of our line-up.
  • It offers superior corrosion resistance.

Description of materials

[Basic composition]

  • K-M57 14.5Cr-3Ni-2Mo-1Al-1Si-Cu,Ti

[Heat treatment condition]

  • Solution treatment 1050℃×2.5hr-rapid cooling
  • Aging treatment 550℃×3hr-air cooling


Magnetic properties


[Available manufacturing dimensions]

Dimensions: 7 to 11.5D (round bar)
Length: 2000 to 4000mm