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Characteristics and uses of main stainless steel types.
Characteristics and uses of main stainless steel types.

 

Characteristics and uses of main stainless steel types

 

304: As a widely used steel, it has good corrosion resistance, heat resistance, low temperature strength and mechanical properties, good hot workability such as stamping and bending, no heat treatment hardening phenomenon, non-magnetic, and the use temperature is minus 193 degrees It is 800 degrees.
Uses: tableware, kitchenware, water heaters, boilers, auto parts, medical equipment, food machinery, wine storage, pressure vessels (chemical machinery, chemical equipment).

 

As a low-carbon 304 steel, 304L has the same corrosion resistance as 304 under normal conditions, but after welding and stress relief, it has good intergranular corrosion resistance and can maintain good intergranular corrosion without heat treatment. Corrosion resistance, generally used at 400 degrees,
Uses: petrochemical industry, building materials.

 

321 adds Ti element to 304 steel to prevent intergranular corrosion, suitable for plus 430 to 900 degrees below, non-magnetic;
Application: For products that do not undergo heat treatment after welding such as automobile exhaust, heat exchangers, containers, etc., due to the addition of Ti element, they are not suitable for food processing equipment.

 

316 has low carbon and added MO elements, so its corrosion resistance, atmospheric corrosion resistance and high temperature strength performance are particularly good. It can be used under harsh conditions and is suitable for use below 900 degrees. It is non-magnetic.
Uses: equipment used in seawater, chemical, dye, paper, acetic acid, fertilizer and other production equipment, food industry and coastal facilities, products with special requirements for resisting intercrystalline corrosion.

 

The two materials of 309S/310S have relatively high content of nickel and chromium. At the same time, the content of Si is increased to make it have high temperature resistance and corrosion resistance. Among them, 309S can withstand repeated heating below 980, and 310S can be used at a temperature of 1200 degrees, continuous use The temperature can be 1150 degrees, non-magnetic.
Uses: Suitable for key parts such as high temperature electric furnace equipment, drying equipment, furnace materials, aviation, petrochemical, electric power, etc.

 

The 200 series is similar to 304, which is cheap and economical.
Uses: food processing utensils, kitchen equipment, food processing equipment, filters, milk tanks, durable consumer goods, washing machine parts, water heaters, steel furniture, building decoration, decoration. In terms of fatigue resistance, the hardness of 201 is greater, but the toughness is not as good as that of 304, but the fatigue resistance of 304 is better.

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