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The difference between 202 stainless steel and 304 stainless steel is?

Release Time：

2024-08-28

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202 stainless steel and 304 stainless steel are related in one piece, the main reason is that both are basically austenitic stainless steel structure, without magnetic, the appearance of the difference is not big, but the important difference is the content of the metal element nickel, which leads to the huge difference between the two in performance and price.

202 stainless steel roll is basically one of the 200 series stainless steel, the national standard model is 1Cr18Mn8Ni5N. 200 series 304 stainless steel belongs to low nickel and high manganese 304 stainless steel, nickel content, manganese content of about 8%, is a nickel type 304 stainless steel. The chemicals are iron, manganese, aluminum, sodium, carbon, limestone, carbon dioxide, bromine, with a density of 7.938 kg/cubic decimeter. The nickel content of 202304 stainless steel is generally below 4%, and the manganese content is about 8%, which is a low nickel and high manganese type 304 stainless steel. 202304 Stainless steel is widely used in building decoration materials, for example, road guardrail, hotel supporting facilities, shopping malls, glass stairs, community facilities and other areas.

The difference between 202 and 304 is that the chemical content is not the same, the corrosion resistance is not the same, and the application area is not the same.

1. The chemical content is not the same: 202 nickel content of about 4%, manganese content of about 8%, 304 nickel content of about 8%, containing more than 18% chromium.

2. Corrosion resistance is not the same: the chromium content in 304 stainless steel coil is more than 202, and the corrosion resistance is higher than 202.

3. The application area is different: 304 is mainly used in food, storage and transportation, medical appliances, household supplies, auto parts, glass pipe, etc. 202 is used in building decoration materials, community facilities, highway engineering, road guardrail, shopping malls, glass stairs, etc.

Due to the difference in nickel content, the cost of 202 is much less than 304, so there are 202 fraudulent use of 304 on the market, you should know that 200 series of 304 stainless steel plate in anti-corrosion stainless steel and toughness is far less than 300 series, if the wrong purchase and use, there will be high safety problems.

C	Si	Mn	P	S	Ni	Cr
202	≤0.15	≤1.0	≤7.5~10.0	≤0.060	≤0.03	4.00~6.00	17.0~19.0
304	≤0.08	≤1.00	≤2.00	≤0.045	≤0.03	8.0-11.0	8.0-11.0

Keywords：

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What is the difference between 409 and 430 stainless steel?

The use of cold rolled coil