Technical Data

Mir50® vs 410 and 416 Comparison Chart

MIR50 NON-GALLING, HIGH STRENGTH STAINLESS STEEL

High Degree of Corrosion Resistance – Similar to type 316 stainless. Hardened “PH” Custom Stainless Alloy.

Elevated Strength Levels – Hardness as delivered Rockwell “C” 26/33. Typical tensile strength is approx. 140,000 PSI @ 28Rc. Can be hardened to Rockwell “C” 36/44 with very little loss in corrosion resistance.

Non-Galling – Compatible with most stainless, carbon and alloy grades of steel.

Ease of Machining – Engineered for ease of machining. Less induced stress and movement. No detrimental additives, such as sulfur and selenium.

Low Carbon Levels – (.05)

Low Degree of Memory – Low degree of retained stress. Very little movement during machining or in service.

High Degree of Wear Resistance – Can be safely hardened to wear plate levels of

Welds Easily – (see welding data).

Excellent Chemistry – Elevated nickel content with additions of Molybdenum, Columbium and Tantalum for corrosion resistance, strength and toughness.

Charpy “V” Notch Impact – approx. 120 ft/lbs @ 70°F (Rockwell “C” 28)

Stress Corrosion Test – 1% NaCl+.5% Acetic Acid + H/2S @ Rockwell “C” 33 w/ 60,000 PSI applied stress – no findings after 500 hours.

SAE 410 and 416 COMMERCIAL GRADE STAINLESS STEELS

Low Degree of Corrosion Resistance – General tool room grades of hardenable stainless. Worst of both worlds—not a great stainless; not a great alloy.

Lower Strength Levels – Most often delivered at Rockwell “C” 22/28. Typical tensile strength is 120,000 PSI @ 26Rc. Additional hardening diminishes corrosion resistance and lowers toughness.

Susceptible To Galling – Parts can seize and tear during routine disassembly.

Ease of Machining – Sulfur and Selenium are added to 410 to make it easier to machine (416). This tends to inhibit welding and lowers strength.

High Carbon Levels – (.15); Lowers corrosion resistance and toughness which will contribute to corrosion cracking.

High Degree of Memory – Retained stress causes bow and twist in thermal treatment, machining and in general service.

Low Degree of Wear Resistance – Further hardening diminishes corrosion resistance.

Welding Difficult – In 410, higher carbon increases susceptibility for weld cracks. 416 stainless is not recommended for welding.

Low Chemistry – No nickel enhancement. Generally speaking low strength and toughness.

Charpy “V” Notch Impact – approx. 38 ft/lbs @ 70°F (Rockwell “C” 28)

Stress Corrosion Test – 1% NaCl+.5% Acetic Acid + H/2S @ Rockwell “C” 35 w/ 60,000 PSI applied stress – visible change after 3 hours.

Information provided is not to be utilized for engineering purposes. It is furnished for sales and marketing comparison purposes.