Ma 201 brushed stainless steel with a Xiangxi Xiangxi Xiangxi [Guangdong cheap sale price] ??? letter states Metal Materials Co., the main operating GB 304 stainless steel, imported sus301 stainless steel, Baosteel stainless steel, Bao new stainless steel, major brands, each specifications and materials made of stainless steel cold rolled coil, plate, rolling narrowband. Steel business has: 201,202,304,321,316L, 409,430 and other products are from Guangzhou Lianzhong, Zhangjiagang Pohang, Ningbo Baoxin, Shanxi Taiyuan and abroad Sweden, Finland, France L, Belgium ALZ, German Krupp, South Korea's POSCO POSCO, Japan's metalworking, Japan freshly iron, Nippon Steel, France Ugine, Ye of Taiwan, Spain, South Africa, etc., and on behalf of clients Kaiping, sanding, slitting, shearing, 8K and other processing . Operating characteristics: can be ordered special materials, specifications thick plates, large in the thick cut, round cut, square cut, unbundled panels. Specialty retailer GB stainless steel, Steel / Po new / Zhang Pu / Krupp (Shanghai), and other major brands, Baosteel 301 stainless steel, 304 stainless steel, stainless steel with hard materials, semi-hard stainless steel, full hard stainless steel, SH special hard stainless steel, imported stainless steel manufacturers, Nippon Steel stainless steel sus304, sus301 high precision stainless steel strip, Germany 316 stainless steel, precision cold-rolled, high-precision stainless steel antioxidant profiles, quality assurance, price concessions. 1.304 stainless steel strip annealing: annealing and pickling line (AP) The modern stainless steel strip production, generally use heat treatment, pickling line for cold-rolled before the processing of raw materials, the purpose is to heat treatment: For hot-rolled steel strip Softening restore plasticity; for cold-rolled steel to eliminate work-hardening after cold rolling; mechanical properties of the finished steel reached regulations. Pickling purpose is: When removing the hot-rolled and annealed steel strip surface oxide scale generated; the stainless steel surface passivation, the corrosion resistance of the steel sheet. A. heat-treated stainless steel heat treatment strictly divided into solution treatment, annealing, quenching, tempering, etc., but generally in the habit of producing no matter what form the heat treatment referred to as annealing. According to the stainless steel strip production process, raw materials can be divided annealing annealing, intermediate annealing and finished annealing. a cold-rolled stainless steel strip annealing materials commonly used for hot-rolled steel strip material. After hot-rolled stainless steel high hardness, and carbide precipitation. The purpose and manner of stainless steel annealing vary, are detailed below: (1) austenitic stainless steel contains large amounts of nickel, manganese and other austenite forming elements, even at room temperature is austenite. But after many hot-rolled carbon content in steel will precipitate carbides. Further, the grains will be deformed due to machining. (2) The austenitic stainless steel may contain not more than 0.08%, or not greater than 0.15% (mass fraction) of carbon, which carbon has a certain solubility in austenite. This steel is annealed steel is heated to the annealing temperature, so that the full solution carbides in the austenite, and then rapidly cooled, dissolved carbon in austenite people will remain in solid solution. Accordingly, the austenitic stainless steel such as at a sufficiently high temperature annealing, and cooled at a rate fast enough; then held at room temperature, then the alloy will remain saturated carbon without carbide precipitation. At the same time, to adjust the grain size during annealing, in order to achieve the object of softening. 2.304 stainless steel finish annealing: finished strip by finish annealing after hardening, in order to achieve the required performance tend to be finished final annealing. (1) austenitic stainless steel heating phase transition does not occur, it will not quench hardening, the yield is relatively low, scalability, can be welded in a wide temperature range. When using resistance welding (spot welding or seam welding), due to the high resistance of welded parts get good mechanical properties. This steel is easy to weld, the unit will not run in the general thrust belt. (2) The ferritic stainless steel does not occur under normal circumstances a phase change, the cooling medium was not cured. But when soldering temperature is too high, grain coarsening easily reduce ductility. Therefore, when the ferritic stainless steel welding is required to prevent overheating, especially when the weld to cross the mill, especially should pay attention to the welding operation. Temperature in the range of austenitic stainless steel is annealed in a continuous annealing furnace between 920 ~ 1150 ℃ and immediately quenched in water solution treatment. Quenching temperature alloys based on the carbon content and additional content may be. Unstable austenitic steel require lower hardening temperatures. To prevent intergranular corrosion, must absolutely avoid precipitation of carbides. Austenitic stainless steel if kept at between 450 ~ 850 ℃, due to the precipitation of carbides and brittle. Carbide precipitation, in addition to the chromium content related, but also with other alloying elements related components. Ma 201 brushed stainless steel with a Xiangxi Xiangxi Xiangxi [Guangdong cheap sale price] ???