First, an overview of stainless steel round bar
Common material for the 301,304,303,316,316 L, 304L, 321,2520,201,202 and so on. Specifications such as diameter, said "50" means that the diameter of 50 mm round steel. Divided into hot-rolled bar, forging and cold drawing three. Hot rolled round steel specifications 5.5-250 mm. Stainless steel bar and promising, are widely used in metal utensils, shipbuilding, petrochemical, machinery, medicine, food, electricity, energy, aerospace, construction and decoration. Sea water using equipment, chemicals, dyes, paper, oxalic acid, fertilizers and other production equipment; photography, food industry, coastal facilities, ropes, CD rods, bolts, nuts.
Second, common types and characteristics of stainless steel round bar
1) 310S stainless steel round bar features: 310S stainless steel is chrome-nickel austenitic stainless steel has good oxidation resistance, corrosion resistance, because a higher percentage of chromium and nickel, 310S has a much better creep strength at high temperature can continue to work, have good temperature resistance.
2) 316L stainless steel round bar Features: 1) the appearance of cold-rolled products, gloss, and beautiful;
2) the addition of Mo, corrosion resistance, particularly excellent pitting resistance;
3), excellent high temperature strength;
4) excellent hardening sex (after processing weakly magnetic)
5) non-magnetic solid solution;
3) 316 stainless steel round bar Features: 316 stainless steel is the second 304, the second most widely used of steel, mainly for the food industry and surgical equipment because of added Mo, so the corrosion resistance, corrosion resistance and high temperature strength special atmosphere, and can be used under conditions in Keku; hardening excellent (non-magnetic). 4) 321 stainless steel round bar Features: Ti added steel in the element 304 to prevent intergranular corrosion, suitable for 430 ℃ -900 ℃ temperature use. Apart from adding the titanium reduce the risk of corrosion of materials other than weld properties are similar to 304 5) 304L stainless steel round bar Performance: 304L stainless steel round bar is low carbon 304 stainless steel variant of the occasion for the need for welding. Lower carbon content makes it close to the weld in the heat affected zone to minimize carbide precipitation, and carbide precipitation may result in some environments, stainless steel, intergranular corrosion (weld erosion). 6) 304 stainless steel round bar Features: 304 stainless steel is the most widely used chromium - nickel stainless steel has good corrosion resistance, heat resistance, low temperature strength and mechanical properties. Corrosion in the atmosphere, the atmosphere or if it is heavily polluted industrial areas, the need for timely clean to avoid corrosion. Third, the corrosion of stainless steel round bar Surface attachment of the dust particles can contribute to corrosion of stainless steel. When the surface of dust particles, in the formation of dust deposition at the gap, easy to maintain chlorine ions in the water film, hindering the supplementary oxygen, leading to passive film damage. In addition, the dissolution of dust deposition area and adjacent areas at the formation of passive occlusion pits aggravated battery formation and development. Fourth, the processing of stainless steel round bar oxide
⑴ sandblasting (pill) method: The main jet is used the method of micro glass beads to remove the black oxide surface.
⑵ chemical method: Use a clean pickling and passivation paste at room temperature with a non-toxic inorganic liquid immersion cleaning additives. Qualities of stainless steel so as to achieve the purpose of whitening treatment. After the deal is basically the color appears to be a dull. This method of large, complex products are more applicable. Fifth, the implementation of the standard stainless steel round bar Stainless steel round bar GB: GB/T14975-2002, GB/T14976-2002, GB/T13296-91 American Standard: ASTM A312/A312M, ASTM A213/213A, ASTM A269/269M Sixth, the processing of stainless steel round bar Industrial area and then drawing surface can be polished bright side