This standard specifies the stainless steel bars (round, collectively square steel, flat steel, hexagonal and octagonal steel, hereinafter referred to as steel bar) in size, shape, technical requirements, test methods, inspection rules, packaging and quality certificates. and so on. This standard applies to the size (diameter, side length, thickness or edge distance, hereinafter referred to as the size) of not more than hot-rolled and forged stainless steel rod of 250mm, negotiated by both sides, but also serves a size greater than 250mm of hot-rolled and forged stainless steel rods. 440 - high strength cutting tool steel, carbon slightly higher, after appropriate heat treatment to obtain a higher yield strength and hardness up to 58HRC, are among the most hard stainless steel. The most common application example is the "razor blades." There are three common models: 440A, 440B, 440C stainless steel profile factory, in addition to 440F (and easy processing). Precipitation hardening stainless steel has good formability and good weldability, high strength materials as used in the nuclear industry, aviation and aerospace industry. Cr components can be divided (400 series), Cr-Ni system (300 series), Cr-Mn-Ni (200 series), heat-resistant chromium steel (500 series) and precipitation hardening system (600 series). 200 Series: chromium - manganese - nickel-201 stainless steel profile processing, 202 and so on: the nickel-manganese-generation, relatively poor corrosion resistance of stainless steel profile industry development, China is widely used as a cheap alternative to the 300 series 300 Series: chromium - nickel Austria martensitic stainless steel 301: scalability, for molding products. It can also be rapidly hardened by mechanical processing. Good weldability. Abrasion resistance and fatigue strength than 304 stainless steel. 302: 304 with corrosion resistance, due to relatively high carbon intensity and therefore better. 303: by adding a small amount of sulfur and phosphorus to more than 304 cutting. 304: Generic Model; that is 18/8 stainless steel. Products such as: corrosion resistant containers, utensils, furniture, railings, medical equipment. Standard components are 18% chromium plus 8% nickel. Is non-magnetic, you can not borrow from the heat treatment method to change the structure of its stainless steel microstructure. GB grades 0Cr18Ni9. 0.5 mm stainless steel profile, Shengyuan stainless steel, stainless steel profile provided by the Dongguan City Shengyuan Stainless. Dongguan Shengyuan Stainless Steel Co. (dg-shengyuan.cn) is Dongguan, a leader in metal packaging machinery, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs. Shengyuan leader in stainless steel with the staff warmly welcome all inquiries negotiations to create a better future Shengyuan stainless steel.