Mir 50® Stainless
Precipitation Hardened, Non-Galling, PSQ Stainless
Mir50 is a (modified) Custom 450® pump shaft stainless steel that blends toughness and corrosion resistance into one steel. Mir50 is a precipitation hardening, martensitic stainless steel which does exhibit corrosion resistance similar to your 300 series stainless steels but with nearly three times the yield strength. Typical hardness is 258/294 BHN. Typical tensile strength is 140,000 PSI.
Mir50 offers excellent resistance to galling, corrosion and shock in severe service applications. Well known as the “4340 of the stainless world”. Agency concurrence includes API-6A, FDA, AMS-5763 (chemistry only) and NACE MR-01-75-097 revision.
Consider using Mir50 in place of certain commercial grade stainless steel including: 416, 410, 17-4PH, 304L, and 316L depending upon the requirement.
Material is offered in three options depending upon your requirements: Pump Shaft Quality (PSQ) Shafts, Rough Turned Oversize (RTOS) Bar Stock, and as (RTOS) Bushing Stock. Call or email us for a quote.