431 stainless steel is a martensitic stainless steel that is AOD melted. This alloy offers the best corrosion resistance of the conventional martensitic stainless grades. This grade is often used in the aerospace industry as fittings and boltings requiring high yield strength. Stainless 431 also has the best corrosion resistance to marine atmospheres, also resists attack by many petroleum products and organic materials, and several acidic environments.
17-7 stainless steel is a stable, chromium-nickel-aluminum precipitation hardened stainless steel that provides high strength and hardness, excellent fatigue properties, moderately resistant to corrosion, good formability, and minimum distortion upon heat treatment.
303 Stainless machines well and cuts clean and maintains it resistance to corrosion in temperatures up to 1500 degrees F. Good applications include repeat machining, fittings and fasteners.
Stainless 317 is an austenitic chromium-nickel stainless steel with excellent corrosion resistance. (317 is a modified version of 316). Its high Molybdenum content enhances the grade’s superior pitting resistance. It is the most corrosion resistant of the 300 Series alloys and possesses the highest tensile and creep strength properties at elevated temperatures.
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