Specification Grade 409, 409L, 410,410S,430 Standard ASTM240 Diameter As customers requirement Length 1000mm-8000mm or as customers' request Surface finish NO1,No.4,2B, BA, 6K, 8K, Hair Line with PVC 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 - 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 Grade Application 409 Automobile exhaust pipe, silencer 410 Flat springs, knives, kitchen utensils and hand tools 420 Cutting tool, measuring tool, dental and surgical instruments, pump shafts, plastic molds and dies, steel balls, scissors, gear shafts,cams, pivots, Lens molds 430 Sinks, sink rims, appliance trim, counter tops, dish washers, range hoods, flatware, architectural uses, roofing, siding and restaurant equipment. Application Aerospace Metal Service Centers Nuclear Marine/Shipbuilding Chemical Processing Oil & Gas Food Service/Restaurant Motorsports Government/Military Pumps & Valves Machined Fabricated Components Power Distribution Fabricator