Clean Steel Technology – a manufacturing process that delivers consistent steel through control and refinement of the melt.
Corrosion Resistance – Similar to that of 316L Stainless, Mir 50 is engineered for use in severe service applications. Most commercial stainless grades fight corrosion but lack strength. Alloy grades and hardenable stainless grades have strength but lack corrosion resistance. Mir 50 does both.
High Strength – Mir 50 is a thermally hardened martensitic stainless alloy. It has similar strength levels like a 4340 Q&T alloy bar product with approx. 140KSI tensile strength. Austenitic grades, such as 304 and 316 stainless, require strain hardening or cold reduction to obtain their hardness. As the shaft size increases, the hardness, strength, and wear resistance, drop off substantially. Mir 50 is thermally treated, the hardness and strength properties remain virtually constant, from the smallest to the largest bars.
Double Stress Relieved – Mir 50 shafts are shipped virtually free of retained stress. This material will be a welcomed change from the warp and bend, common to other stainless grades. Because Mir 50 has “low memory” properties, these shafts will not exhibit the “movement” and “walking” commonly experienced when machining 304, 316, and other stainless grades.
Ease of Machining – Mir 50 machines easily. It is not gummy, and it will hold a bright finish. Because Mir 50 machines easily, there is little induced stress to cause movement once the shaft is in service. You save time and money by getting the shaft into service quickly and eliminating many of the previously required straightening operations.
Non-Galling – Mir 50 is non-galling. It is compatible with almost every other stainless grade, as well as carbon and alloy grades of steel. Maintenance people will find that hex nuts, caps, and collars come apart easily for inspection, replacement and repair.
Pump Shaft Straightness – Mir 50 has been specifically designed as a maintenance material suitable for pump shaft applications in highly corrosive environments. It is strong, machines easily, and stays straight during machining and in service. Mir 50 is also available with a semi-finished, oversized, surface finish, so that the size will make the size. Specify semi-finished pump shaft stock when you do not require TG&P stock.
Excellent Low Temperature Properties – Mir 50 offers excellent mechanical properties at low service temperatures; @ -325°F on a 1″ Diameter Bar. Typical tensile strength 219,000 PSI; typical yield strength 136,000 PSI; and impact strength 36 ft/lbs
Typical Mechanical Properties (Based on 1/2″ Dia. Specimen)