Standard_Parts_Catalogue

Page 2166 | Material Characteristics Material Characteristics of Stainless Steel AISI Standard 431 440C 304 303 German Material No. 1.4057 1.4125 1.4301 1.4305 DIN / EN-Number EN 10088-3 EN 10088-3 EN 10088-3 EN 10088-3 Symbol X 17 CrNi 16-2 X 105 CrMo 17 X 5 CrNi 18-10 X 8 CrNiS 18-9 Alloying components % C ≤ 0,12 ... 0,22 Cr 15,0 … 17,0 Ni 1,5 … 2,5 C ≤ 0,95 … 1,2 Cr 16,0 … 18,0 C ≤ 0,07 Cr 17,5 … 19,5 Ni 8,0 … 10,5 C ≤ 0,10 S ≤ 0,15 … 0,35 Cr 17,0 … 19,0 Ni 8,0 … 10,0 Minimum tensile strength Rm in N/mm 2 800 … 950 750 … 1500 500 … 700 500 … 700 Yield strength Rp 0,2 in N/mm 2 ≥ 600 - ≥ 190 ≥ 190 Machinability poor poor ... medium medium very good Forgeability medium – good poor Weldability good poor excellent poor Special characteristics magnetic, martensitic structure for elements with high stability, can be used up to 400 °C magnetic, martensitic structure, thoroughly heat treatable, high wear resistance antimagnetic, austenitic structure suitable for low temperatures, can be used up to 700 °C antimagnetic, austenitic structure Corrosion resistance good however, sensitive to intercrystalline corrosion medium Freshwater, oil, gasoline, alcohol, dairy products good resistant to corrosion, in the natural environ- ment: water, rural and urban atmospheres without significant chloride or acid con- centrations, in food areas and in agri- cultural food areas medium due to the sulphur content reservations in environments which contain acids and chlorides Main areas of application Vehicle construction Chemical industry Aviation Machine construction Food industry Blades, surgical cutting instruments, ball bearings, valves Food industry Agriculture Chemical industry Vehicle construction Construction industry Machine construction Decorative purposes (Kitchen equipment) Vehicle construction Electronics Decorative purposes (Kitchen equipment) Machine construction The characteristics described should be treated as guidelines only. No guarantee is made. The exact conditions of use have to be taken into account individually.