Spring Steel  Information Carbon spring steel is held in a wide range of sizes. Detailed below are our most common spring steel specifications. Carbon steel strip and spring steel sheet is available most commonly in the hardened and tempered condition, though certain sizes are available in the annealed condition. Round and flat bar is stocked in the as rolled condition. Most spring steel specifications are held to British Standard steel specifications including BS1449 & BS970. We also hold stock of stainless steel spring steel. Stainless spring steel is supplied spring temper rolled in grade 301 stainless which is an austenitic stainless steel.  Stainless spring steels are also stocked in 420 which is a martensitic stainless steel specification. Shim steel is stocked in grade BS1449 CS4.   TYPICAL ANALYSIS EN43    C. Si. Mn. S. P. 0.50% 0.30% 0.70% 0.015% 0..015% TYPICAL ANALYSIS EN45   C. Si. Mn. S. P. 0.57% 2.00% 0.90% 0.015% 0.015% TYPICAL ANALYSIS EN47   C. Si. Mn. Cr. V. 0.50% 0.35% 0.70% 1.00% 0.10% Available forms  -  Spring Steels Round Bar / Rod Flat Bar Plate    TYPICAL ANALYSIS CS70    C. Si. Mn. S. P. 0.70% 0.25% 0.70% 0.015% 0..015% TYPICAL ANALYSIS CS80   C. Si. Mn. S. P. 0.80% 0.25% 0.70% 0.015% 0.015% TYPICAL ANALYSIS CS95   C. Si. Mn. S. P. 0.95% 0.25% 0.70% 0.015% 0.015% Available forms: Hardened & Tempered Spring Steel Strip Annealed Spring Steel Strip Spring Steel Sheet  Spring Steel Plate Copyright 2008 Disclaimer    Spring Steels Specifications BS1449 CS60 CS70 CS80 CS95 HS60 HS70 GS80 HS95 BS970 EN43 EN43A EN43B EN43C EN43D EN43E EN43F EN42 EN42A EN42B EN42C EN42D EN44 EN44A EN45 EN45A EN46 EN47 KE896 EN48 EN50 251A58 251A60 261H60 525A58 525A60 525H60 525A61 735A51 735H51 735A54 250A61 250A58 250A53  BSEN10132 527H60 735A50 1.0903 51Si7 1.0906 65Si7 1.5028 66Si7 1.0904 55Si7 1.0902 46Si7 50SiMn7 65SiMn7 60SiMn7 55SiMn7 AISI 9255 9260 9250 50S7 TGL BS AFNOR 50S7 60S7 55S7 55Si7 45S7 46S7 1.8159 50CrV4 6150 735A50 50CV4301S21 301 1.4310 Z12CN17.07 SUS301  AISI 1050 1055 1060 1065 1070 1075 1080 1085 1090 1095 1.1274 1.1269 SK4 SK5 BS970 070A72 080M50 080M55 080M60  75CrV1 735H51 805H60 Silicon Manganese Spring Steel  Chromium Vanadium Spring Steel Chrome Vanadium Spring Steel Carbon Spring Steel Stainless Spring Temper Rolled Stainless Spring Steels Precision Wire  Blue Blued Spring Steel