304L stainless steel bar: 304 as the low-carbon steel, in general 303f stainless steel bar, corrosion resistance and 304 similar, but after welding or eliminate stress, its excellent corrosion resistance to the grain boundary, in the case without heat treatment next, but also to maintain good corrosion resistance. 304 stainless steel bar: Shenzhen has good corrosion resistance of stainless steel bar, heat resistance, low temperature strength and mechanical properties, stamping 201 stainless steel bar, bending and other thermal processing, and no heat treatment hardening. From the metallographic point of view, because the chromium film formed on the surface of stainless steel contains chromium leaving thin, the membrane separating oxygen from invading the inner steel corrosion effect. In order to maintain the inherent corrosion resistance of stainless steel, the steel must contain more than 12% chromium. Stainless steel types: stainless steel can use, chemical composition and microstructure to the general classification. In austenitic class steel from 18% chromium and 8% nickel as a basic component, an amount of each element of the change is different stainless steel bar, and the development of various uses of steel. In chemical composition: ①. CR Series: ferritic series, martensite series ②. CR-NI Series: austenitic series, abnormal series, precipitation hardening series. 420 stainless steel bar, Shengyuan stainless steel, stainless steel bar 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.