Introduction to Stainless Steel Models
Stainless steel has the characteristics of high plasticity, toughness and mechanical strength, and is resistant to corrosion by acid, alkaline gas, solution and other media. Stainless steel is also one of the strongest materials in construction metal materials. Due to the wide range of uses of stainless steel, there are also many models of stainless steel.
Stainless steel model table
200 Series - Chromium-Nickel-Manganese Austenitic Stainless Steels
300 Series - Chromium-Nickel Austenitic Stainless Steels
Model 301—It has good ductility and is used for molded products. It can also be hardened by mechanical processing. Good weldability. Wear resistance and fatigue strength are better than 304 stainless steel.
Model 302—has the same corrosion resistance as 304, but has better strength due to relatively high carbon content.
Model 303 - can be easier to cut than 304 by adding a small amount of sulfur and phosphorus.
Model 304—Universal model; that is, 18/8 stainless steel. GB grade is 0Cr18Ni9.
Model 309—Better temperature resistance than 304.
Model 316 - the second most widely used steel after 304, 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.
Model 321—Similar to 304 except that the addition of titanium reduces the risk of corrosion in material welds.
400 Series - Ferritic and Martensitic Stainless Steels
Model 408—Good heat resistance, weak corrosion resistance, 11% Cr, 8% Ni.
Model 409—the cheapest model (British and American), usually used as a car exhaust pipe, is a ferritic stainless steel (chrome steel).
Model 410—martensitic (high-strength chromium steel), with good wear resistance and poor corrosion resistance.
Model 416—Sulphur is added to improve the processability of the material.
Model 420 - "cutting grade" martensitic steel, the earliest stainless steel similar to Brinell high chromium steel. Also used in surgical knives, can do very bright.
Type 430—ferritic stainless steel, for decorative purposes, such as for automotive accessories. Good formability, but poor temperature and corrosion resistance.
Model 440—high-strength cutting tool steel, with slightly higher carbon content, high yield strength can be obtained after proper heat treatment, and 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 processing type).
500 Series - Heat Resistant Chromium Alloy Steel.
600 Series - Martensitic precipitation hardening stainless steel.
Model 630—The most commonly used type of precipitation hardening stainless steel, usually also called 17-4, 17%Cr, 4%Ni.
