Good translation Metal Products (Shanghai) offers stainless steel (made of stainless steel / stainless steel imports) SUS304 stainless steel / SUS304 steel / SUS304 steel bar / SUS304 steel coil / SUS304 steel / SUS304 steel / SUS304 steel (good translation Metal Products (Shanghai) Co., Ltd. ) 
 Use 
 Household goods, cabinets, indoor pipes, water heaters, boilers, bathtubs, auto parts, medical equipment, building materials, chemical, food industry, agriculture, ship parts. 
 SUS304 Heat Treatment Specification: Solution 1010 ~ 1150 ℃ fast-cooling. 
 Microstructure: Organizing for the austenitic type. 
 SUS304 that is 18 / 8 stainless steel. GB grades for 0Cr18Ni9. 
 Japan JIS standard material SUS304, SUS series austenitic stainless steel in Japan. Equivalent to our 0Cr18Ni9, 304 U.S. 
 Feature 
 Has good corrosion resistance, heat resistance, low temperature strength and mechanical properties, thermal processing such as punching and bending is good, no hardening heat treatment, non-magnetic. 
 Heat treatment 
 Because it contains high nickel and austenitic at room temperature showed a single-phase structure, so it is with Cr13 stainless 
 Steel compared with the high corrosion resistance, low temperature, room temperature and high temperature plastic go and have a higher toughness, and good cold forming and welding. However, the lower the intensity at room temperature, intergranular corrosion and stress corrosion tendency of large, poor machinability. Austenite no phase change when heated, it is not enhanced by heat treatment. Only to improve the corrosion resistance of steel heat treatment: 
 1) solution treatment; The goal is to fully dissolve the carbides, and retained in the austenite at room temperature, thus at room temperature by single-phase austenite, the steel has the highest corrosion resistance. 
 Solution treatment of heating temperature generally higher, between the 1050-1100C, according to the level of carbon content to make appropriate adjustments. As the poor thermal conductivity of 18-8 stainless steel, not only to warm up and then quenched by heating, but also in the solution heat treatment (quenching) when the holding time is longer. Solution treatment, we should pay special attention to prevent the growth of carbon. 18-8 will increase because of increased carbon steel to intergranular corrosion tendencies. Cooling medium, generally water. Organization after solution treatment is usually single-phase austenite, but titanium, niobium, molybdenum, stainless steel, especially when the castings, also contains a small amount of ferrite. Hardness after solution treatment is generally 135HBS so. 
 2) In addition to stress annealing; in order to eliminate the residual stress after cold working, processing at a lower temperature. Generally heated to 250-425C, is frequently used 300-350C. For non-titanium or niobium steel should not exceed 450C, in order to avoid precipitation of chromium carbide 
 Caused by intergranular corrosion. 
 In order to eliminate the residual stress after welding, to eliminate the stress corrosion susceptibility of steel to the processing at higher temperatures. Heating temperature is not lower than 850C. Cooling for steel containing titanium or niobium can be directly cooled in the air; does not contain titanium or niobium for the steel should be cooled to 500C and then in the air after cooling. 
 3) stabilization process; order to prevent the titanium and niobium in the welding of austenitic stainless steel or solid solution, due to a decrease in TiC and NbC cause reduced resistance to intergranular corrosion, this stainless steel must be heated to a certain temperature (the temperature to completely dissolve in austenitic chromium carbide, while only partial dissolution of TiC and NbC) and then slow cooling. In the cooling process, so full of carbon steel and titanium and niobium compounds, stable precipitation of TiC and NbC, without precipitation of chromium carbides, thereby eliminating the 18-8 austenitic stainless steel to intergranular corrosion tendency, this process called stabilization treatment. 
 18-8 stainless steel stabilizing annealing, is generally heated to 850-880C, heat 2-6h, followed by air cooling or furnace cooling. 
 Chemical composition 
 Carbon C: ≤ 0.07 Si Si: ≤ 1.00 
 Chromium Cr :17.00-19 .00 
 Manganese Mn: ≤ 2.00 
 Ni Ni :8.00-11 .00 
 Phosphorus P: ≤ 0.035 
 Sulfur S: ≤ 0.030 
 Mechanical properties 
 Yield strength (N/mm2) ≥ 205 
 Tensile strength ≥ 520 
 Elongation (%) ≥ 40 
 Hardness HB ≤ 187 HRB ≤ 90 HV ≤ 200 
 Density of 7.93 g? Cm-3 
 Specific heat c (20 ℃) ??0.502 J? (G? C) -1 
 Thermal conductivity λ / W (m? ℃) -1 (in the following temperature / ℃) 
 20 100 500 
 2.1 16.3 21.4 
 Linear expansion coefficient α / (10-6 / ℃) (at room temperature following / ℃) 
 20 100 20 200 20 300 20 400 
 16.0 16.8 17.5 18.1 
 Resistivity of 0.73 Ω? Mm2? M-1 
 Melting point of 1398 ~ 1420 ℃ 
 The company offers domestic and imported stainless steel varieties, complete specifications, special specifications can be customized processing. Division I and to provide original certificates, material certificates (chemical mechanical properties) and the like arguments! Please note that request! Users are welcome to inquire Order, the Company will be free shipping! Other materials, if necessary, good translation 
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 (Good translation Metal Products (Shanghai) Co., Ltd. published) 
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