316 - Following the 304, the second most widely used of steel, mainly used in food industry, pharmaceutical 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. 
 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. 
 We hope to get in touch with our customers, the company in line with the attitude of win-win cooperation with our customers.