SKH*4C ( hardened HRC*0 ° ± 2 °): with a very good anti-rust , corrosion resistance, wear resistance and ideal impact resistance, wide range of applications and the corresponding AISI**0C SUS**0C has more excellent sharp cutting resistance and wear performance . Soaked in salt water , rust resistance excellent quality and very stable , can produce non- standard, special extremely complex , all kinds of high -precision shape.