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, 316 stainless steel screws, and slightly lower than the austenitic stainless steel; resistivity press steel, ferritic size, martensitic 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, Qingdao 316 stainless steel screws, austenitic stainless steel non-magnetic, but it generates a work hardening martensitic phase transformation will generate magnetism, heat treatment method can be used to eliminate this martensite and restore its non-magnetic. Machine screw (1) Slotted cheese head screws: GB65 / DIN84 (2) Slotted pan head screws: GB67 / DIN85 (3) Slotted countersunk head screws: GB68 / DIN963 (4) Slotted flat head screws (5) Cross recessed small pan head screws: GB823 (6) Cross recessed flat head screw (7) Cross recessed pan head screws: GB818 / DIN7985 (8) Cross recessed countersunk head screws: GB819 / DIN965 (9) Cross recessed head screws : GB820 / DIN966 square neck bolts (1) round head square neck bolts: GB14 / DIN603 (2) less than half head square neck bolts: GB12 (3) low semi-circular head square neck bolts: GB801 Notes: square neck bolts and carriage bolt inside Allen screws (1) hexagon socket head screws: GB70 / DIN912 (2) Hexagon socket set screws: BG70 / DIN913 (3) Hexagon tip set screws: Hexagon Convex within GB78 / DIN914 (4) countersunk head end tight screws: GB79 / DIN915 (5) Hexagon socket set screws: Hexagon thin head screws DIN7991 (7) inside:: GB80 / DIN916 (6) hex head screws DIN7984 (8) a Cypriot screws: ISO7379 Taian 316 stainless steel screws, 316 stainless steel screws, Jinan Road ground is provided by Jinan Daoqin Trading Company. Jinan Daoqin Trading Company (www.daoqinshangmao.com) (www.daoqinshangmao.com) strong, credible, in Jinan, Shandong hardware accessories industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead Jinan Road ground into the brilliant and you work for a better future!