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How to Distinguish Stainless Steel 304 and 202 Stainless Steel 202 More Than 1000 yuan Cheaper

What is stainless steel?

Stainless steel is a type of steel, steel is called steel containing carbon (C) below 2%, and more than 2% is iron. The addition of chromium (Cr), nickel (Ni), manganese (Mn), silicon (Si), titanium (Ti), molybdenum (Mo) and other alloying elements to the steel during the smelting process improves the properties of the steel and renders the steel corrosion resistant. (that is, not rust) is what we often say stainless steel.
Stainless steel is usually divided into martensitic steels, ferritic steels, austenitic steels, austenitic-ferritic (duplex) stainless steels, and precipitation hardened stainless steels. In addition, it can be divided into: chromium stainless steel, chromium nickel stainless steel and chromium manganese nitrogen stainless steel.
Stainless steel in the smelting process, due to the addition of different alloy elements, different varieties of different amounts. Its characteristics are also different, in order to distinguish it is crowned with a different steel number, the following is a common decorative stainless steel different steel "alloy element" content table is for reference only:
Steel Grade Carbon (C) Silicon (Si) Manganese (Mn) Phosphorus (P) Sulfur (S) Chromium (Cr) Nickel (Ni) Molybdenum (Mo) Copper (Cu)
304 ≤ 0.08 ≤ 1.00 ≤ 2.00 ≤ 0.045 ≤ 0.03 18-20 8-10
301 ≤ 0.15 ≤ 1.00 ≤ 2.00 ≤ 0.045 ≤ 0.03 16-18 6-8
202 ≤ 0.15 ≤ 1.00 7.5-10 ≤ 0.05 ≤ 0.03 17-19 4-6
201 ≤ 0.15 ≤ 1.00 5.5-7.5 ≤ 0.05 ≤ 0.03 16-18 3.5-5.5
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