![]() The balanced austenitic structure of Grade 304 enables it to be severely deep drawn without intermediate annealing. Welding can be performed using grade 410 filler rods, but ductile welds can be achieved using grades 308L, 309 or 310 steels. It is recommended to pre-heat the materials to 200 - 300☌ before welding, and carry out post-weld heat treatment at 650☌. It is the most versatile and most widely used stainless steel available, even though a wide range of alternatives are available and has excellent forming and welding characteristics. Welding of grade 431 stainless steels is difficult due to the chances of cracking. AISI 316 stainless steel (UNS S31600) is the second most commonly used austenitic. Grade 304 is a standard '18/8' stainless. Because of its composition, 316 and 316L stainless steel plate is more tolerant of corrosion than its 304 and 304L stainless steel plate counterpart. The following table lists the chemical composition of SS304 in various standards. Difference between ss 304 and ss 316 pdf. It also has molybdenum content which gives it greater pitting and crevice corrosion resistance compared to austenitic grades of stainless steel. 304 Stainless Steel Composition (SS304 Chemical Composition)ģ04 stainless steel composition contains 18% chromium and 8% nickel, so it is also known as 18-8 steel. Nominal Composition Physical Properties At 70F (At 20C) Density 0.29 lb./in 3 / (7.99 g/cm 3) Modulus of Elasticity (E) 28.0 x 10 3 ksi in tension / (193 x 10 3 MPa in tension) Coefficient of Expansion 8.9 x 10 -6 microinches/in.-F (32-212F) / (16.0 m/m-C) (0-100C) Electrical Resistivity 29.4 ohm.in / (74 ohm. Grade 316 stainless steel contains 16-18 chromium and 11-14 nickel content which provides better corrosion resistance than conventional 304-grade stainless steel. ![]()
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