Grade

• Nitronic® 50 (J93790 / CG6MMN / Licensed by Armco, Inc.)

Description

• Low carbon austenitic stainless steel

Properties – Why select this material

• The most corrosion resistant alloy in the Nitronic family.
• Mechanical properties and corrosion resistance are superior to published values for CF8/304 and CF8M/316.
• Excellent performance in acidic, chloride and hydrogen sulfide environments.
• Good strength and ductility from high temperature to cryogenic.

There are numerous grades of austenitic stainless steel and obviously selection depends on more than one criterion. However, as these alloys are primarily used for corrosion resistance, the method most commonly used for initial selection and comparison is to establish PREn ratings (pitting resistant equivalent number).  This is calculated using a simple equation to establish the value of weight % of key alloying elements.  The formula used is:

Grade

• Austenitic Stainless Steels.

Description

• Of all elements added to the basic alloy of chromium and iron, nickel is the most important. It not only improves corrosion resistance, but also changes the alloy’s structure and mechanical properties. As nickel is added in increasing amounts to a ferritic iron/chromium alloy, the structure of the alloy changes from ferrite, through mixed ferrite and austenite, to essentially all austenite. The change in structure is accompanied by a marked increase in ductility and toughness. Austenitic stainless alloys that are by far the most widely used of all types.