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What are the uses of different types of stainless steel balls(2)

Update:16-11-2021
Summary:

Stainless steel ball 304 Features: 304 stainless steel […]

Stainless steel ball 304
Features: 304 stainless steel ball is a typical representative of austenitic steel, generally non-magnetic, but will become magnetic after polishing, can be demagnetized, the hardness is small, HRC ≤ 28, but has good rust and corrosion resistance.
Uses: 304 stainless steel ball is the most widely used steel ball on the market. It can be used in medical equipment, chemicals, aviation, aerospace, plastic hardware, perfume bottles, sprayers, valves, nail polish, motors, switches, electric irons, washing machines, and electric appliances. Refrigerators, air conditioners, medicinal materials, auto parts, bearings, instruments, baby bottles, etc. 304HC stainless steel balls are softer and easier to process than 304 stainless steel balls; 304L stainless steel balls have stronger rust and corrosion resistance than 304 stainless steel balls and 304HC stainless steel balls. They are easy to weld and have excellent polishing properties. They are more suitable for industries with higher surface requirements.
Stainless steel ball 302
Features: 302 stainless steel ball belongs to austenitic steel, which is close to 304, but the carbon content of 302 is higher than 304, so the hardness is higher than 304, HRC≤28. Has good rust and corrosion resistance.
Uses: 302 stainless steel balls are widely used in auto parts, aviation, aerospace, hardware tools, and chemicals. Specifically include handicrafts, bearings, pulleys, medical equipment, posts, electrical appliances, etc.
Stainless steel ball 440/440C
Features: The metallographic structure belongs to martensitic steel, and the production process requirements are relatively high. There are relatively few domestic companies that can produce 440C stainless steel, so companies that can produce 440C materials are often dubbed the reputation of special stainless steel. The heat treatment process is more complicated, easy to crack, and requires high precision. It is the hardest stainless steel ball among steel balls: HRC≧58. The hardness is close to the bearing steel ball, but it has stronger anti-rust and anti-corrosion performance than the former.
Uses: Compared with 440 stainless steel balls, 440C stainless steel balls have stronger anti-rust and anti-corrosion properties, with increased hardness and wear resistance. They are usually used in industries that require high precision and anti-rust properties: aviation, aerospace, bearings, motors, high-precision instruments, valves, petroleum, etc.
Stainless steel ball 201
Features: It is a kind of nickel-saving steel, austenitic steel, non-magnetic, low price, and excellent performance. It can be processed, welded, drilled, and the hardness is HRC≤28.
Uses: 201 stainless steel balls are widely used in various hardware industries, handicrafts, and plastic products, such as lamps, switches, motorcycle accessories, luggage, bearings, die castings, etc. Generally, 201 is used environmentally Where the stainless steel material is not demanding. 201 stainless steel balls cannot be used in industries with high requirements for rust and corrosion protection, as well as in seawater or acidic substances. In these environments, 304, 316, 316L, 317L stainless steel balls should be used instead. The latter is far better than 201 in corrosion resistance and stamping performance. In terms of price, 304, 316, 316L and 317L stainless steel balls are also much higher than 201 stainless steel balls.