400 series - Ferritic and martensitic stainless steel
408, good heat resistance, low corrosion resistance, 11% Cr, 8% Ni.
409 - the most inexpensive models (England), usually used in automobile exhaust pipe, is a ferritic stainless steel (steel).
410 - martensite (high strength steel), good wear resistance, corrosion resistance is poor.
416 - sulfur added to improve the processing properties of materials.
420 - "cutting class" martensitic steel, similar Brinell first high-chromium stainless steel this. Also used in surgical operation tools, can do very light.
430 - ferritic stainless steel, decorative, such as for car accessories. Good shape, but heat resistance and corrosion resistance is worse.
440 - high strength cutting tool steel, carbon slightly higher, after appropriate heat treatment to obtain a higher yield strength, hardness can reach 58HRC, belongs to the most hard stainless steel column. The most common application example is the "razor blade". There are three common models: 440A, 440B, 440C, and 440F (easy processing).
500 series - resisting chromium alloy steel.
600 series of Martensite Precipitation Hardening Stainless steel.
630 - the most commonly used precipitation hardening stainless steel type, also known as 17-4 17%Cr, 4%Ni.
