The Chinese standard grade of 201 stainless steel is 1Cr17Mn6Ni5N, which is usually marked as UNS S20100 in the American standard. 201 stainless steel material has certain acid and alkali resistance, while it has high density, polishing without bubbles and pinholes, etc. 201 stainless steel is mainly used for making decorative tubes, industrial tubes, etc. The chemical composition standards of 201 stainless steel include: (C) Carbon: ≤ 0.15, (Si) silicon: ≤ 1.00, (Mn) manganese: 5.5 to 7.50, (Cr) chromium: 16.0 to 18.0, (N) nitrogen: ≤ 0.25, (P) phosphorus: ≤ 0.060, (S) sulfur: ≤ 0.030, (Ni) nickel: 3.5-5.5.

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