201 series - Chrome-nickel-manganese austenitic stainless steel.
300 series - Chrome-nickel austenitic stainless steel.
301- Good ductility for molding products. It can also be quickly hardened by mechanical processing. Good weldability. The wear resistance and fatigue strength are better than 304 stainless steel.
302-corrosion resistance and 304, due to relatively high carbon and therefore better strength.
303- Easier to machined than 304 by adding a small amount of sulfur and phosphorus.
304- General model; So 18/8 stainless steel. The GB brand is 0Cr18Ni9.
309- Better temperature resistance than 304.
316- The second most widely used steel after 304, mainly used in the food industry and surgical equipment, with molybdenum added to give it a special structure that is resistant to corrosion. It is also used as "Marine steel" because of its better resistance to chloride corrosion than 304. SS316 is usually used in nuclear fuel reprocessing units. Grade 18/10 stainless steel is also usually qualified for this application class. [1]
Model 321- Similar to 304 except that titanium is added to reduce the risk of weld corrosion.
400 series - ferrite and martensitic stainless steel.
408- Good heat resistance, weak corrosion resistance, 11% Cr, 8% Ni.
409- Cheapest model (Anglo-American), usually used as automobile exhaust pipe, ferritic stainless steel (chrome steel).
410- Martensite (high strength chromium steel), good wear resistance, poor corrosion resistance.
416- Sulfur was added to improve the machining properties of the material.
420-" edge grade "martensitic steel, similar to brinell high chromium steel, the earliest stainless steel.Also used for surgical knives, which can be made very bright.
430-ferritic stainless steel, for decorative purposes, e.g. for automotive accessories. Good formability, but poor temperature and corrosion resistance.
440- high strength cutting steel, slightly high in carbon, with proper heat treatment to achieve high yield strength, hardness up to 58HRC, is one of the hardest stainless steels. The most common example is the "razor blade". There are three common models :440A, 440B, 440C, and 440F(easy to process).
Series 500 - Heat resistant chrome alloy steel.
600 series - Martensite precipitation hardened stainless steel.
630- The most commonly used precipitation hardened stainless steel model, also commonly called 17-4; 4% 17% Cr, Ni.
