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Difference from ASTM 304 and ASTM 202 stainless steel

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Difference from ASTM 304 and ASTM 202 stainless steel

Here is difference from ASTM 304 and ASTM 202 stainless steel.

Different content of Ni.

ASTM 202 stainless steel is 200 series stainless steel one. 200 series stainless steel is a low-nickel stainless steel high manganese, nickel content is generally below 4%, 8% manganese content, is the feast of nickel stainless steel.

ASTM 304 is the most important element of Ni, Cr, but it is not limited to these two elements. Specific requirements by the product standard requirements. Industry conditions as long as the common determination Ni content is more than 8%, Cr content greater than 18%, it can be considered 304 stainless steel. This is why this type of stainless steel industry will be called 18/8 stainless steel causes. In fact, the relevant product standard 304 has a very clear requirements and standards for different shapes of these products have some differences of stainless steel. Here are some common product standards and testing.

Different materials, corrosion resistance than ASTM 304 for ASTM 201 poor, acid and alkali resistance ASTM 304 better because it is more than ASTM 201 high nickel content, carbon content is low, ASTM 201 material if used in the acid environment rust, easily detected with a magnet. Because a lot of the fraud who made ​​ ASTM 201 the same material is not magnetic.

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