This grade is a high nitrogen and molybdenum bearing austenitic stainless steel that has a comparable or surpassing corrosion resistance to that of 316/316L and 317/317L plus approximately twice the yield strength at room temperature. The alloy does not become magnetic when cold worked, unlike many austenitic stainless steels.
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 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.
Of the 400 series of stainless steels, 400C has the highest carbon content and moderate corrosion resistance and can heat-treat to the highest harness of RC 60. (In contrast, 416 is normally heat treated to RC 26/32)
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