2. Different chemical formulas: the chemical formula of 20 1 is 1Cr 17Mn6Ni5, and the chemical formula of 304 is 06cr19ni10; Their main differences are nickel and chromium, 304 is 19 chromium and 10 nickel, while 20 1 is 17 chromium and 5 nickel.
3. Different performance: due to the different nickel content, the corrosion resistance of 20 1 is far less than that of 304, and the acid and alkali resistance of 20 1 is also less than that of 304. Because the carbon content of 20 1 is higher than 304, 20 1 is harder and more brittle than 304, and 304 has better toughness. Cut with a hard scraper.
Extended data:
Precautions:
1. Observe whether the surface color of 304 stainless steel plate is bright and smooth, and whether the thickness is uniform and rough. Excellent products evaluated by the Bureau of Quality and Technical Supervision should be selected when purchasing. Long-term use of witnesses and good reputation among customers are the most direct and effective ways to buy. Heavy skin and pockmarks often appear on steel plates, which are unavoidable under normal circumstances and basically do not affect the use, but you must choose as few as possible when buying.
2. From the price analysis, if the 304 stainless steel plate is even lower than the general price of 30 1 material in the market, it should be carefully identified, and it is likely that other materials are passing off.
3. Identify whether the board is printed with 304 words, and ask for the manufacturer's quality certificate as proof.
4. It can be tested with acid reagent, and the material 304 will not change color after 30 seconds.
Baidu encyclopedia -20 1 stainless steel
Baidu Baike -304 Stainless Steel