Stainless steel 455 is a martensitic, age-hardenable alloy yielding strength characteristics that are roughly 3 times the strength of standard 304 stainless. 445 resists staining in normal atmospheres and shows no corrosion in fresh water, good ductility and toughness. This alloy is extremely stable during heat-treating making it able to be machined to close tolerance prior to aging.
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 304, also known as 18-8 stainless, is the most common steel used in a variety of uses because of the ease in which it can be formed into various shapes. Non-magnetic and highly resistant to corrosion makes it a good all-purpose stainless.
Type 403 stainless is a corrosion and heat resistant 12% Cr martensitic alloy, very similar to stainless type 410, with the exception of a slightly lower maximum silicon content and a slightly lower maximum chromium content. Good levels of strength, toughness and ductility may be obtained with this alloy.
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