Specification Grade 409,409L,410,410S,420,420J2,430 Standard ASTM A240 Thickness Cold rolled:0.2-3.0mm Hot rolled:3.0-60mm Length 2000mm-8000mm or as customers' request Surface finish NO1,No.4,2B, BA, 6K, 8K, Hair Line with PVC Mechanical Properties Grade YS(Mpa) ≥ TS (Mpa) ≥ El (%) ≥ Hardness(HV) ≤ 409 175 360 20 150 410 200 440 20 145 410S 200 410 20 145 430 200 450 25 145 Chemical Composition Grade C Si Mn P≤ S≤ Cr Mo Ni Other 409 ≤0.03 ≤1.00 ≤1.00 0.04 0.03 10.5-11.7 - ≤0.6 Ti=6×C%~0.75 410 ≤0.15 ≤1.00 ≤1.00 0.04 0.03 11.5-13.5 - - - 410S ≤0.08 ≤1.00 ≤1.00 0.04 0.03 11.5-13.5 - - - 420 ≤0.15 ≤1.00 ≤1.00 0.04 0.03 12.0-14.0 - - - 430 ≤0.12 ≤0.75 ≤1.00 0.04 0.03 16-18 - ≤0.4 - Surface Treatment Name Feature Specification Picture 2B Bright After cold rolling ,by heat treatment ,pickling or other equivalent treatment and lastly by cold rolling to given appropriate luster. BA Polishing ,mirror Processed with bright heat treatment after cold rolling Hairline Line like hair Hair grain grinding by appropriate particle size of material 6K/8K Mirror, brighter than BA Very bright, grinding and polishing surface by 1000# strop grain of abrasive belt Finish:BA,2B,2D,No.1,No.4,8k BA - processed with bright heat treatment after cold rolling. 2B - after cold rolling, by heat treatment, pickling or other equivalent treatment and lastly by cold rolling to given appropriate luster. 2D – matt finish, best choice for deep drawing. No.1-finished by hot rolling,annealing and packing,characterized by white pickled surface. No.4-Polishing with No.150 to No.180 mesh abrasives. Applications of Stainless Steel Coils and Sheets: 1.Automotive:Automotive trim and molding/Difficult-to-form exhaust-system components, tubular manifolds, mufflers/Exhaust manifold and other exhaust-system components, catalytic converter shells. 2. Construction: Gutters and downspouts, roofing, siding. 3. Kitchenware: Cooking utensils, dishwashers, ovens, range hoods, refrigerators, skewers. 4. Chemical processing: Oil refinery equipment, oil burner and heater parts. 5. Appliances: Hot water tanks, residential furnaces.