Stainless 446 is a high chromium ferritic heat resistant alloy with a high resistance to oxidation, sulfidation and other forms of hot corrosion. It has a high ductile-to-brittle impact transition temperature. 446 is the only heat resistant alloy that will tolerate molten copper and brass.
17-4, also known as 630 stainless, can be heat treated to high levels of strength and hardness, and good for machining and is corrosion resistant. Often used in petroleum and chemical industries, as well as in aircraft parts.
Stainless 422 is a hardenable, martensitic stainless steel with better strength at higher temperatures as high as 1200 F. It is capable of being heat treated to various high strength levels.
Alloy 321 (UNS S32100) contains increased titanium for improved strength and heat resistance, making it ideal for applications range of 800 – 1500°F (427 – 816°C). It has excellent resistance to intergranular corrosion. A popular aircraft alloy.
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