All types and uses of stainless steel

The following are all types and uses of stainless steel:

One, 301 - good ductility, used for molding products. Machine speed hardening is also possible. Good weldability. Wear resistance and fatigue strength are better than 304 stainless steel.

Second, 302-corrosion resistance is the same as 304, because the carbon content is relatively high and the strength is better.

Three, 303-by adding a small amount of sulfur and phosphorus to make it more cutting.

Four, 304—that is, 18/8 stainless steel. GB grade is 0Cr18Ni9.

Five, 309 - has better temperature resistance than 304.

Six, 316 - after 304, the second most widely used steel grade, mainly used in the food industry and surgical equipment, adding molybdenum to obtain a special structure that is resistant to corrosion. Because of its better resistance to chloride corrosion than 304, it is also used as "marine steel". SS316 is usually used in nuclear fuel recovery units. Grade 18/10 stainless steels generally also meet this application level.

Seven, 321 - Similar to 304 except that the risk of corrosion of the material weld is reduced due to the addition of titanium.

Eight, 400 series—ferritic and martensitic stainless steels.

Nine, 408 - good heat resistance, weak corrosion resistance, 11% Cr, 8% Ni.

Ten, 409 - the cheapest model (British and American), usually used as a car exhaust pipe, is a ferritic stainless steel (chromium steel).

Eleven, 410—martensite (high-strength chromium steel), with good wear resistance and poor corrosion resistance.

Twelve, 416—Addition of sulfur improves material processing properties.

Thirteen, 420 - "cutting grade" martensitic steel, the earliest stainless steel similar to Brinell high chromium steel. Also used in surgical knives, can do very bright.

Fourteen, 430 - ferritic stainless steel, decorative use, such as for car accessories. Good formability, but poor temperature and corrosion resistance.

Fifteen, 440—high-strength cutting tool steel, with slightly higher carbon content, can obtain higher yield strength after proper heat treatment, and the hardness can reach 58HRC, which is one of the hardest stainless steels. The most common application example is "razor blades". There are three commonly used models: 440A, 440B, 440C, and 440F (easy to process).

XVI, 500 Series—Heat-resistant chromium alloy steels.