302 - 304 with corrosion resistance, due to relatively high carbon intensity and therefore better. 
 303 - by adding a small amount of sulfur and phosphorus to more than 304 cutting. 
 304 - General Model; or 18 / 8 stainless steel. GB grades for 0Cr18Ni9. 
 309 - compared to 304 a better temperature resistance. 
 316 - Following the 304, the second most widely used of steel, mainly used in food industry and surgical equipment, add molybdenum to obtain a special corrosion-resistant structure. Better than the 304 because of its resistance to chloride corrosion and thus as "marine steel" to use. SS316 is often used to fuel recovery. 18/10 grade stainless steel is usually in line with the application level. [1] 
 Model 321 - not only because titanium elements added to reduce the risk of corrosion of the weld material properties similar to other than 304. 
 400 Series - ferritic and martensitic stainless steel 
 408 - heat resistance, corrosion resistance is weak, 11% Cr, 8% of Ni. 
 409 - the cheapest model (Anglo-American), often used as a car exhaust pipe, is a ferritic stainless steel (chrome steel). 
 410 - martensite (high-strength chromium steel), wear resistance, corrosion resistance is poor. 
 416 - added sulfur improves the processing performance of materials. 
 420 - "cutting class" martensitic steel, high chrome steel, this Brinell similar to the first stainless steel. Also used in surgical tools, can be made very light. 
 430 - ferritic stainless steel, decorative, such as for automotive accessories. Good formability, but the temperature resistance and corrosion resistance worse. 
 440 - high-strength steel cutting tools, carbon slightly higher, after appropriate heat treatment to obtain a higher yield strength, hardness can achieve 58HRC, are among the most hard stainless steel as well. The most common application example is the "razor blades." There are three commonly used models: 440A, 440B, 440C, in addition to 440F (and easy processing). 
 500 series - heat-resistant chromium alloy steel. 
 600 Series - martensitic precipitation hardening stainless steel. 
 630 - The most common type of precipitation hardening stainless steel, commonly known as 17-4; 17% Cr, 4% Ni. 
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