Spring steel uses: spring steel high precision, good toughness, wear resistance, stable quality. The main spring steel type, very versatile and can manufacture all kinds of medium-section <25mm important springs, such as 60Si2Mn 55Si2MnB 55SiMnVB Cr Series cars, tractors and leaf springs, coil springs and other 50CrVA excellent hardenability, high tempering stability, off Carbon and graphite tendency low; good mechanical properties, corrosion resistance has some containing V, Mo, W and other elements of the spring has a certain temperature resistance; because of both high quality steel, it is used to further improve the fatigue performance Important large heavy load spring manufacturing large size (50 ~ 60mm), such as the engine valve springs, conventional weapons, bombs take the hook spring, spring; thermal springs, such as boiler safety valve springs, injectors springs, cylinder expansion ring. Spring steel strip products suitable for damper valves, diaphragm spring clutch, air compressor valves, knitting machine parts, sinkers, Kazakhstan negative, knitting needles, Sinker, a variety of printing scraper, circular knives, etc. metal stamping shrapnel, spring, spring, stretching pieces, anti-spring high demand products. Grade spring steel: Japanese spring steel: SUP6 SUP7 SUP9 SUP9A SUP10 SUP11A SUP12 SUP13 SUJ2 SUJ3 SUJ4 SUJ5 SUP10-CSP SK55-CSP SK85-CSP S70C-CSP S65C-CSP S60C-CSP S55C-CSP S50C-CSP sk5 sk7 sk3 sk4 Korea spring steel: SPS1 SPS3 SPS4 SPS5 SPS5A SPS6 SPS7 SPS8 SPS9 STB1 STB2 STB3 STB4 STB5 SH590P SH590S Swedish spring steel: 1770 1774 1,778,191,219,141,922 1,926,194,019,571,973 English spring steel: 38Si7 45SiCrV6-2 46Si7 46SiCrMo6 50SiCrMo6 51CrV4 52CrMoV4 52SiCrNi5 54SiCr6 54SiCrV6 55Cr3 56Si7 56SiCr7 60Cr3 60CrMo3-1 60CrMo3-2 60CrMo3-3 60SiCrV7 61SiCr7 251A85 251A60 251H60 525A58 525A60 525H60 525A61 658A57 658A57 704A60 705A60 705H60 735A51 735H51 735A54 805H60 925A60 251A85 251A60 251H60 525A58 N525A60 535A99 805A20 832H13 German spring steel: C67S CK67 C75S CK75 C85S CK85 C100S CK101 38Si6 38Si7 46Si7 51Si7 56Si7 55Si7 1.1231 1.1248 1.1269 1.1274 1.5022 1.5023 1.5024 1.5025 1.5023 1.5028 1.5029 15142 1.5225 1.7102 1.7103 1.7106 1.7018 international standard spring steel: 38Si7 46Si7 51CrV4 52CrMoV4 55Cr3 55SiCr6-3 55SiCrV6-3 56SiCr7 60Cr3 60CrMo3-3 60Si8 American spring steel: ASTMA228 ASTMA227 ASTMA679 ASTMA229 ASTMA231 ASTMA232 ASTMA878 ASTMA401 AISI302 ASTMA313 AISI316 ASTMA313 AISI631 A-286 Inconel718 InoconelX-750 AMS5698 AMS5699 AISI1050 ASTMA682 AISI1074 Chinese spring steel: 65 70 75 80 85 65Mn 55Si2Mn 55Si2MnB 55SiMnVB 60Si2Mn 60Si2MnA 60Si2CrA 60Si2CrVA 60CrMnA 50CrMn 55CrMnA 50CrVA 60CrMnBA 60CrMnMoA 30W4Cr2VA 100CrMn6 100CM6 100CrMn7 100CrMnMo8 100CrMo7-2 100CD7 100CrMo7-3 100CrMo8-3 8E3 C54E4 C55E3 C70E3 X12MoCrNi4-4-3X46Cr13 X75WCrV18-4-1 X82WMoCrV6-5-4 Z85WDCV6 X89CrMoV18-1 X105CrMo17 Z100CD17 heat-treated spring steel more details the characteristics of spring steel heat treatment depending on the processing method of forming the spring, generally can be divided into hot forming and cold forming spring springs into two categories: 1) hot forming spring-sectional dimension> 10mm variety of large and complex shape of the spring are used thermoforming (such as hot-rolled, HRC), such as cars, tractors, trains leaf spring and coil spring. Its simple processing route is: Gold-flat or round material under heat bending or winding → → → surface hardening tempering peening, using state organization is tempered prop's body. Shot can enhance the surface and improve the surface quality of the spring, significantly improved fatigue performance. 2) cold forming spring-sectional size <10mm of various small spring can be cold formed (such as cold coils, cold rolled), such as the instrument of the coil spring, spring and spring tablets. Such spring before the first cold forming pull (cold), after quenching and tempering temperature or lead bath austempering cold drawn (rolled) enhancement; then cold forming process, this process will further strengthen the metal, but also produce greater stress and brittle, it should be carried out in the subsequent low temperature stress relief annealing (generally 200 ~ 400 ℃).