Bolt, High strength bolts, Screw
304: As a widely used steel, it has good corrosion resistance, heat resistance, low temperature strength and mechanical properties, stamping, bending and other hot working properties, no heat treatment hardening phenomenon, no magnetism, and the use temperature is - 193 ℃ to 800 ℃. Usage: Tableware, kitchenware, water heaters, boilers, automotive accessories, medical equipment, food machinery, wine storage, pressure vessels (chemical machinery, chemical equipment). 304L: As a low-carbon 304 steel, its corrosion resistance is generally similar to 304, but after welding and stress relief, it has good resistance to intergranular corrosion and can also maintain good corrosion resistance. It is generally used at 400 degrees Celsius. Usage: Petrochemical industry, building materials. 321 Adding Ti element to 304 steel to prevent intergranular corrosion, suitable for temperatures below 430-900 degrees, non magnetic; Usage: Products that do not undergo heat treatment after welding, such as automotive exhaust, heat exchangers, containers, etc., Due to the addition of Ti element, it is not suitable for manufacturing food processing equipment. 316 is low-carbon with the addition of MO element, making it particularly good in corrosion resistance, atmospheric corrosion resistance, and high-temperature strength. It can be used under harsh conditions and is suitable for temperatures below 900 degrees Celsius, without magnetism. Usage: Equipment used in seawater, production equipment such as chemicals, dyes, papermaking, acetic acid, fertilizers, food industry, and coastal facilities have special requirements for intergranular corrosion. The content of nickel and chromium is relatively high, while increasing the content of Si, making it resistant to high temperatures and corrosion. 309S can withstand repeated heating below 980 degrees Celsius, 310S can operate at temperatures up to 1200 degrees Celsius, and can continuously operate at temperatures up to 1150 degrees Celsius, without magnetism. Usage: Suitable for key components such as high-temperature electric furnace equipment, drying equipment, furnace materials, aviation, petrochemical, power, etc. The 200 series is similar to 304 in terms of cheap economy. Usage: Food processing utensils, kitchen equipment, food processing equipment, filters, milk cans, durable consumer goods, washing machine accessories, water heaters, steel furniture, building decoration, and decoration. In terms of fatigue resistance, 201 has higher hardness and lower toughness than 304 or 304.
