What are the differences between 10 steel, 304, 316, and 321?

Steel grade 10 possesses good plasticity and toughness; it is easy to form through hot or cold working. It exhibits good machinability after normalizing or cold working, has excellent weldability, and is free from temper brittleness. However, its hardenability and penetrability are poor. 304 (domestic grade 0Cr18Ni9): A widely used steel with good corrosion resistance, heat resistance, low-temperature strength, and mechanical properties ； It has good hot workability for processes such as stamping and bending, and shows no hardening due to heat treatment (non-magnetic, operating temperature range: -196°C to 800°C). 316 (domestic grade 0Cr17Ni12Mo2): Due to the addition of Mo, it exhibits excellent corrosion resistance, resistance to atmospheric corrosion, and high-temperature strength, allowing it to be used under harsh conditions ； It has good work hardening properties and is non-magnetic, making it suitable for equipment used in seawater. 321 (domestic grade 0Cr19Ni10Ti): Ti element is added to 304 steel to prevent intergranular corrosion ； Suitable for use at temperatures ranging from 430°C to 900°C; it has a high cost and inferior workability compared to SUS304.

304, 316, and 321 are all steels that have evolved from the 18Cr-8Ni base. 304 features a reduced carbon content based on 18Cr-8Ni (

The guy on the second floor is professional; no further comments needed: handshake

One is carbon steel, three are stainless steel; the standards are different

I’m not sure whether it refers to chemical composition or physical properties! They vary from each other

In addition to what was mentioned on the 2nd floor, there are also 304L and 316L, which belong to low-carbon steel.