201 stainless steel square tube Brief introduction of 201 material Type 201 is an austenitic chromium-nickel-manganese stainless steel. It can be used in most applications as a substitute for 301. Type 201 is nonmagnetic in the annealed condition, but becomes slightly magnetic when cold worked. The rate of work hardening is similar to type 301, although type 201 develops somewhat higher yield strength while retaining equal ductility when cold worked. Toughness at low temperatures is excellent. 202 stainless steel square tube Brief introduction of 202 material 202 stainless steel is one of the 200 series stainless steel. 200 series stainless steel has low nickel (4%-6%) and high manganese (7.5%-10%). It's widely used in building decoration, municipal engineering, highway guardrail, hotel facilities, shopping malls, vitreous armrest, public facilities, etc. Detailed Product Description Products Name Grade 201/202 Stainless Steel square tube Standard ASTM A554, A249, A269 and A270, A312 Grade 201 ( Ni 0.8%-1.3%), Wall Thickness 0.3mm-4.5mm Out diameter 10mm x 10mm - 150mm x 150mm Length 5.8m 6m  or as customers' request Tolerance a) Outer Diameter:  +/- 0.2mm b) Thickness: +/- 0.02mm c) Length: +/- 5mm Surface 180G, 320G, 400G Satin / Hairline 400G, 600G, Mirror finish Application Decoration construction, upholstery, industry instrument Handrail, Railing, Staircase, Door, Window, Balcony, Fence, Bench, Furniture Test Squash test, extended test, water pressure test, crystal rot test, heat treatment, NDT Chemical Composition of Material Material Composition 201 202 C ≤0.10 ≤0.15 Si ≤1.00 ≤1.00 Mn 9月11日 7.5-10 P ≤0.06 ≤0.06 S ≤0.03 ≤0.03 Cr 13 17-19 Ni 0.8 -1.3 4~6 Cu 0.80-1.0 Mechanical Property Material Item 201 202 Tensile Strength ≥535 ≥520 Yield Strength ≥245 ≥205 Extension ≥30% ≥30% Hardness (HV) <253 <253 201/202 stainlesss steel tube Application Typically used for: food processing equipment, appliances, sinks, restaurant equipment, cooking utensils, hardware, automotive trim, architectural applications, buses, trailers, fastener parts and hose clamps.