304 (domestic brand 0Cr18Ni9): a widely used steel, corrosion resistance, good heat resistance, low temperature strength and mechanical properties; punching, bending and other thermal processing, non hardening heat treatment (non magnetic, temperature -196 DEG ~800 DEG.316 (0Cr17Ni12Mo2) of domestic brands): add Mo therefore, the corrosion resistance, corrosion resistance and high temperature strength is very good, can be used in severe conditions; work hardening is good, no magnetism, suitable for marine equipment.321 (domestic brand 0Cr19Ni10Ti): add the Ti element in the 304 steel to prevent grain boundary corrosion; suitable for use at 430 DEG -900 DEG the temperature under the high cost of processing is worse than SUS304.
Author: Ge Yu
Link: https://www.zhihu.com/question/26797270/answer/131141596
Source: knowing
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