316 and 317, Yantai stainless steel screw bolt, they all contain the alloying elements Mo, stainless steel screws, so their high-temperature strength and corrosion resistance than 18-8 stainless steel high. 321 and 347, 321 contain a more stable alloy elements Ti, 347 type containing Nb, thereby increasing the resistance to intergranular corrosion of materials. Not annealed or stainless steel fasteners in 420 ~ 1013 ℃ after serving applies to welding. The physical properties of the physical properties of stainless steel and carbon steel data comparison, slightly higher than the density of steel ferritic and martensitic stainless steel, but slightly lower than the austenitic stainless steel; resistivity press steel, ferritic, martensitic Body and austenitic stainless steel Sort Ascending; linear expansion coefficient of the sort is similar, austenitic stainless steel and carbon steel up to a minimum; carbon steel, ferritic and martensitic stainless steel magnetic, austenitic stainless steel No magnetic, but it will have to generate a work hardening martensite phase change magnetic heat treatment method can be used to eliminate this martensite and restore its non-magnetic. Mainly exported to cities are: Tianjin, Shanghai, Jiangsu, Anhui, Chongqing, Shaanxi, Hebei, Hunan, Jiangxi, Sichuan, Guangdong, Jilin, Ningxia, Shaanxi, Fujian, Hainan, Linyi stainless steel screw bolts of our quality assurance , after-sale service, Linyi stainless steel screws ring, regular telephone follow customer fastener usage. Providing customers with a full range of services "is our consistent commitment to corporate culture: professionalism, integrity, fast stainless steel screws _ _ Qingdao, Jinan Road ground stainless steel screws provided by Jinan Daoqin Trading Company stainless steel screws _ _ Qingdao, Jinan Road ground stainless steel. Jinan Road ground screw Trading Company (www.daoqinshangmao.com) (www.daoqinshangmao.com) this year introduced a new upgrade, the above picture is for reference only, please call the telephone or pictures on this page, for the latest information Contact: SUN Chuan use.