The national standard of stainless steel is manufactured in accordance with the unified industry standards and norms promulgated by the state; Non-standard products or equipment are not manufactured in accordance with the unified industry standards and norms promulgated by the state.
2. Different product functions
Different uses of stainless steel products have different requirements for welding performance. A kind of tableware generally does not require welding performance, even including some pot enterprises. However, most products need good welding performance of raw materials, such as second-class tableware, thermos cups, steel pipes, water heaters, water dispensers and so on.
Stainless steel non-standard products are products or equipment designed and manufactured by themselves according to their own needs. And the appearance or performance is not in the national equipment product catalogue.
Extended data:
International stainless steel marking method
The American Iron and Steel Association uses three numbers to represent various standard grades of malleable stainless steel. These include:
① Austenitic stainless steel is marked with serial numbers of 200 and 300. For example, some common austenitic stainless steels are marked with numbers of 20 1, 304, 3 16 and 3 10.
② Ferritic and martensitic stainless steels are represented by 400 series numbers.
③ ferritic stainless steel is marked with 430 and 446, and martensitic stainless steel is marked with 4 10, 420 and 440C.
④ Duplex (austenite-ferrite), stainless steel, precipitation hardening stainless steel and high alloy with iron content less than 50% are usually named by patent names or trademarks.
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