Imports of stainless steel imported high quality stainless steel 303 yuanb

Dongguan City Changan Jian Teng Metal Materials Co., Ltd. is located in China, Guangdong, Dongguan Changan Jian Teng Metal Materials Co., Ltd. is a die steel, stainless steel, white steel tool, easy to iron, cold-drawn steel, copper, aluminum, round , high-speed steel, tungsten steel, tungsten, copper, die steel, stainless steel, white steel tool, easy to iron, cold-drawn steel, copper, aluminum, bar, high-speed steel and other products, distribution and wholesale of private limited liability company. Mold steel Dongguan Changan Jian Teng Metal Materials Co., the stainless steel, white steel tool, easy to iron, cold-drawn steel, copper, aluminum, bar, high-speed steel, tungsten steel, tungsten, copper, steel mold, stainless steel, white steel tool, easy to iron, cold-drawn steel, copper, aluminum, round, high-speed steel selling consumer markets. Dongguan City Changan Jian Teng Metal Materials Co., Ltd. products among consumers enjoy higher status, with many retailers and agents to establish a long-term stable cooperative relations. Dongguan City Changan Jian Teng Metal Materials Co., Ltd. Distribution of mold steel, stainless steel, white steel tool, easy to iron, cold-drawn steel, copper, aluminum, bar, high-speed steel, tungsten steel, tungsten, copper, steel mold, stainless steel, white steel tool, easy to iron, cold-drawn steel, copper, aluminum, round, high-speed steel variety, reasonable prices. Dongguan City Changan Jian Teng Metal Materials Co., strength, credit, keep the contract, to ensure product quality, variety principles of operating characteristics and puerile, and win the trust of our customers. 430 Stainless Steel Chemical composition (%) of carbon (C): ≤0.12 silicon (Si): ≤0.75 manganese (Mn): ≤1.00 phosphorus (P): ≤0.040 sulfur (S): ≤0.030 Nickel (Ni): ≤0.60 Cr (Cr): 16.00 ~ 18.00 molybdenum (Mo): 2.00-3.00 430 stainless steel mechanical properties: density: 7.7g / cm3 Melting point: 1427 ℃ expansion coefficient: m / m ℃ (at 20-100 ℃) Young's modulus: kN / mm2 modulus of rigidity: kN / mm2 Application Standard: n / a W.NR (UNS) stainless steel has two classifications: one is based on the characteristics of the alloy elements into chromium stainless steel and chrome-nickel stainless steel; the other is by organizational status in normalizing state steel, stainless steel is divided into M, F stainless steel, A stainless steel, A a F duplex stainless steel. A martensitic stainless steel typical martensitic stainless steel with good processing performance 1Cr13 ~ 4Cr13 and 9Cr18 1Cr13 steel, etc.. May preheated deep drawing, bending, curling and welding. 2Crl3 before cold deformation does not require preheating, but be preheated before welding, 1Crl3,2Cr13 mainly used to produce corrosion resistant structural parts such as turbine blades, and 3Cr13,4Cr13 mainly used to produce medical equipment scalpel and wear parts; 9Crl8 bearing and corrosion do. Second, the amount of Cr ferritic stainless steel containing ferritic stainless steel is generally 13% to 30% of the combined carbon content of less than 0.25%. Sometimes adding other alloying elements. Microstructure mainly ferrite, heating and cooling process without αγ change, can not be strengthened by heat treatment. Strong antioxidant. It also has good hot workability and cold workability certain. Ferritic stainless steel is mainly used to make demands for higher corrosion resistance and strength requirements of the lower member, it is widely used in pipe manufacturing nitric acid, nitrogen and other equipment and chemical use and the like. Typical ferritic stainless steel has Crl7 type, Cr25 and Cr28 type type. Third, the austenitic stainless steel is austenitic stainless steel for corrosion resistance Markov overcome deficiencies and brittle too big and developed. The basic components of Crl8%, Ni8% referred 18-8 steel. Its characteristics are combined carbon content of less than 0.1%, the use of Cr, Ni with a single phase austenite. Austenitic stainless steel is generally used in the manufacture of chemical production of nitric acid, sulfuric acid and other equipment components, industrial refrigeration after cryogenic equipment components and stainless steel springs can be used by the deformation strengthening and watches mainspring. Austenitic stainless steel has good resistance to uniform corrosion performance, but in terms of localized corrosion, there are still the following questions: 1. Inter-austenitic stainless steel to intergranular corrosion of austenitic stainless steel in the 450 ~ 850 ℃ holding or slow cooling, occur intergranular corrosion. Carbon content, the greater the tendency to intergranular corrosion. In addition, the heat-affected zone of the weldment intergranular corrosion will occur. This is due to the grain boundary precipitation of Cr-rich Cr23C6. It produces around the base chromium depleted zone, thereby forming a galvanic cell corrosion caused. This corrosion phenomenon between the aforementioned ferritic stainless steel also exist. Often used on the project in several ways to prevent intergranular corrosion: (1) reduce the amount of carbon in the steel, the steel combined carbon content below the saturation solubility in austenite at equilibrium, from a fundamental solution of chromium carbide (Cr23C6) in the grain boundary precipitation problems. Usually combined carbon content in steel fell 0.03% to meet resistance to intergranular corrosion requirements. (2) by adding Ti, Nb, etc. can form a stable carbide (TiC or NbC) elements, avoiding the grain boundary precipitation Cr23C6, then on between austenite stainless steel anti-corrosion. (3) by adjusting the ratio of austenitic and ferritic elements forming elements are formed to have austenitic + ferritic two-phase structure, wherein ferrite accounts for 5% to 12%. This two-phase structure is not easy to intergranular corrosion. (4) the use of appropriate heat treatment to prevent intergranular corrosion, get the best corrosion resistance. 2. Stress corrosion cracking of austenitic stainless steel stress (mainly tensile stress) and the combined effects of corrosion caused by the called stress corrosion cracking, called SCC (StressCrackCorrosion). Austenitic stainless steel prone to stress corrosion in corrosive media containing chlorine ions. When the amount of Ni containing up to 8% to 10%, the austenitic stainless steel stress corrosion tendentiousness largest, continues to increase Ni content to 45 to 50% by stress corrosion tendency gradually reduced until it disappears. The main way to prevent stress corrosion cracking of austenitic stainless steel is added Si2 ~ 4% and will be controlled from the smelting N content of 0.04% or less. It should also minimize the content of P, Sb, Bi, As and other impurities. In addition the choice of AF duplex steel, it Cl- and OH- media is not sensitive to stress corrosion. When the initial fine cracks after experiencing ferrite phase no longer continue to expand, the ferrite content should be around 6%. 3. Strain hardening of austenitic stainless steel single-phase austenitic stainless steel has good cold deformation properties can be cold drawn into a very fine wire, cold rolled into a thin strip or pipe. After a lot of distortion, greatly improve the strength of steel, especially when rolling in the minus temperature zone, the effect is more significant. Tensile strength of up to 2000MPa above. This is because in addition to the effect of work hardening, but also superimposed M strain-induced transformation. Austenitic stainless steel after deformation strengthening used to make stainless spring, clocks spring, rope and other aviation structures. For deformation after welding, spot welding process is only the deformation increase the stress corrosion tendentiousness. And because some γ-> M transition and produce ferromagnetism in use (such as instrument the part) should be considered. Recrystallization temperature change with deformation when deformation was 60%, the recrystallization temperature down to 650 ℃ cold deformation of austenitic stainless steel recrystallization annealing temperature of 850 ~ 1050 ℃, 850 ℃ need insulation 3h, 1050 ℃ When it can burn through, and then cooled.