Application of different grade of stainless steel

Application of different grade of stainless steel

With the continuous development and progress of society, stainless steel as a new type of material is more and more known by people, and the fields of application are becoming wider and wider.
However, as a non-stainless steel industry, people in daily life do not understand the various properties and uses of stainless steel, buying stainless steel products will not be able to fully understand all aspects of products, so how can you buy a reliable product?
Don’t worry, today Xiaobian will take you to understand the full range of properties and uses of stainless steel.
Stainless steel is divided into three series of 200, 300, 400 (except for dual-phase steel), the main varieties are 201,202,304,304J1,304L,321,316(L),309S,310S,430,409L and so on.

1,201
Features: acid and alkali resistant, high density, no bubbles, no pinholes, etc.
Uses: mainly used for decorative tubes, industrial tubes and some shallow stretched products;

2,202
Features: Reduced nickel, increased Mn and N; has good mechanical properties and corrosion resistance; below 800 degrees has good oxidation resistance and medium temperature strength;
Uses: decorative tubes, industrial tubes and some shallow stretched products;

3,304
Features: Good corrosion resistance, heat resistance, low temperature strength and mechanical properties; hot workability such as punching, bending, etc., no heat treatment hardening phenomenon (non-magnetic, operating temperature -196°C~800°C);
Uses: 304 is widely used in the stainless steel family, home appliances, cutlery, kitchen utensils, water heaters, boilers, food machinery, etc. can be used. Daily use of kitchen products, daily necessities and other household items, it is best to buy 304 of the finished product, of course, is food-grade;

4,304J1
Features: Addition of Cu element on the basis of 304, so its formability, especially wire drawing and anti-aging cracking, and can carry out complex shape of the product; corrosion resistance and 304 are the same;
Uses: Used for replacing part 304 applications; mainly used for vacuum flasks, kitchen sinks, pots, pots, insulated lunch boxes, door handles, textile processing machines, etc.;

5,304L
Features: Compared with 304, 304L reduces the C content. Under normal conditions, its corrosion resistance is similar to that of 304 steel, but its resistance to grain boundary corrosion is excellent after welding or after eliminating stress. It can also maintain good corrosion resistance without heat treatment. It is generally used below 400 (non-magnetic, use temperature -196°C~800°C)
Uses: Anti-grain boundary corrosion requirements of the chemical, coal, petroleum industry, outdoor open-air machines, building materials, heat-resistant parts and difficult parts of heat treatment;

6,321
Features: Based on 304, adding Ti element to improve grain boundary corrosion resistance, suitable for 430 °C ~ 900 °C temperature;
Uses: medical equipment, building materials, chemicals, agriculture, marine components, nuclear energy industry, aircraft, pipe, boiler drum auto parts (windshield wipers, muffler, molded products);

7,316(L)
Features: 316 contains Mo element, corrosion resistance, atmospheric corrosion resistance and high temperature strength is particularly good, can be used under harsh conditions. Excellent work hardening (non-magnetic); 316L has a low content of C relative to 316, and its grain boundary corrosion resistance is excellent;
Uses: 316 and 316L are mainly used for equipment, chemical, dyestuff and papermaking in seawater with high requirements for corrosion resistance. Oxalic acid, fertilizers and other production equipment; food industry, coastal facilities, ropes, CD rods, bolts, nuts;

8,309S
Features: 309S has excellent high temperature resistance, corrosion resistance and strength;
Uses: Suitable for parts with working temperature of 1000 °C; Exhaust machine, heat treatment furnace and heat exchanger;

9,310S
Features: good oxidation resistance, corrosion resistance and high temperature resistance; due to high content of chromium and nickel, 310S has strong creep strength, can continue working at high temperatures, with good high temperature resistance;
Uses: high temperature environments such as boilers, exhaust machines, heat treatment furnaces and heat exchangers;

10,430
Features: low thermal expansion, excellent formability and oxidation resistance;
Uses: 430 is the most representative type of ferritic stainless steel, a wide range of uses; heat appliances, burners, household electrical appliances, 2 types of dishes, kitchen sinks, exterior decoration materials, bolts, nuts, CD rods, screens Can be applied in other fields;