Hardened And Tempered Spring Steel Strips C50 1050 C60 1060 C75 1075 1095 C100S SK4 SK5 65MN 51CRV4 75CR1 D6A

Hardened and Tempered  Spring steel strips C50 1050 C60 1060 C75 1075 1095 C100S SK4 SK5 65MN 51CRV4 75CR1 D6A 1,Delivery Conditions: Delivery Condition Sizes Surface Edge 1.Cold Rolled  1.Thickness: 0.09-8mm  Bright / Polished / Blue/Yellow Slit 2.Cold Rolled+Hydrogen Annealed  2.Width: 6-450mm Round 3.Cold Rolled+Hardened+Tempered Coil insider diameter: 300-800mm Square 2, Grades comparision: GRADES COMPARISON FOR SPRING STEEL CHINA  GB/T USA     ASTM JAPAN    JIS GERMANY   DIN FRANCE   NF BIRTAIN  BS ISO KOREA    KS TAIWAN   CNS 45 1045 S45C CK45 XC45   C45     50 1050 S50C CK50 XC50 080M50 C50     60 1060 S60C  CK60 XC60 060A62 C60     70 1070 S70C CK70 XS70   S70     75 1075 S75C  CK75 XC75   C75     T10 W1-9 SK4             T9 W1-8 SK5             SK85 --- SK85             40Mn 1043 SWRH42B 40Mn4 40M5 080A40 SL,SM     42Mn                 65Mn 1566 S60C-CSP CK67   080A67 C60E4     55Si2Mn 9255 SUP 6  /SUP7               55Si7 55Si7 251H60 55SiCr7     60Si2Mn 9260 SUP 6 /  SUP7     65Si7 65Si7 251H60 61SiCr7 SUP3 SUP6 62Si2Mn                 75Cr1   75Cr1 75Cr1 75Cr1         51CrV4 5160 SUP9A 51CrV4 51CrV4     SPS5A SUP9A 30CrMo G41300 SUP13 35CrMo4       SPS9 SUP13 50CrVA 6150 SUP10 51CrV4 51CrV4 735A51 51CrV4 SPS6 SUP10 3,Chemical Composition: Standard Grade Chemical Composition（%）   C Si Mn P  S  Cr Ni Cu V GB/T699 45 0.42～0.50 0.17～0.37 0.50～0.80 0.035 0.035 0.25 0.3 0.25   GB/T699 50 0.47～0.55 0.17～0.37 0.50～0.80 0.035 0.035 0.25 0.3 0.25   GB/T699 55 0.52～0.60 0.17～0.37 0.50～0.80 0.035 0.035 0.25 0.3 0.25   GB/T699 60 0.57～0.65 0.17～0.37 0.50～0.80 0.035 0.035 0.25 0.3 0.25   GB/T699 65 0.62～0.70 0.17～0.37 0.50～0.80 0.035 0.035 0.25 0.3 0.25   GB/T699 70 0.67～0.75 0.17～0.37 0.50～0.80 0.035 0.035 0.25 0.3 0.25   GB/T699 75 0.72～0.80 0.17～0.37 0.50～0.80 0.035 0.035 0.25 0.3 0.25   GB/T699 Mn40 0.37～0.44 0.17～0.37 0.70～1.00 0.035 0.035 0.25 0.3 0.25   GB/T699 Mn45 0.42～0.50 0.17～0.37 0.70～1.00 0.035 0.035 0.25 0.3 0.25   GB/T699 Mn65 0.62～0.70 0.17～0.37 0.90～1.20 0.035 0.035 0.25 0.3 0.25   GB/T1298 SK85/SK5 0.80 ~0.90 ≤0.35 ≤0.50 0.03 0.03 0.2 0.25 0.3   GB/T1298 SK4 0.95～1.04 ≤0.35 ≤0.40 0.035 0.03 0.25 0.2 0.3   GB/T3077 51CrV4 0.47～0.55 0.17～0.37 0.80～1.10 0.035 0.035 0.90～1.20 0.3 0.3 0.10～0.20 GB/T3077 50CrVA 0.47～0.54 0.17～0.37 0.50～0.80 0.025 0.025 0.80～1.10 0.3 0.3 0.10～0.20 GB/T3077 75Cr1 0.7～0.8 0.25～0.5 0.50～0.70 0.035 0.035 0.30～0.40       GB/T1222 55Si2Mn  0.52～0.60 1.50～2.00 0.60～0.90 ≤0.035 ≤0.035 ≤0.35 ≤0.35 ≤0.25   GB/T1222 60si2Mn 0.56～0.64 1.50～2.00 0.60～0.90 ≤0.035 ≤0.035 ≤0.35 ≤0.35 ≤0.25   4, Our Tolerances: THICKNESS TOLERNACES Nominal Thickness (mm) W < 125 125 <= W A B C A B C 0,15~0,25 TS EN ±0,015 ±0,012 ±0,008 ±0,020 ±0,015 ±0,010 YONGLI STEEL ±0,008 ±0,010 0,25~0,40 TS EN ±0,020 ±0,015 ±0,010 ±0,025 ±0,020 ±0,012 YONGLI STEEL ±0,010 ±0,012 0,40~0,60 TS EN ±0,025 ±0,020 ±0,012 ±0,030 ±0,025 ±0,015 YONGLI STEEL ±0,015 ±0,015 0,60~1,00 TS EN ±0,030 ±0,025 ±0,015 ±0,035 ±0,030 ±0,020 YONGLI STEEL ±0,015 ±0,020 1,00~1,50 TS EN ±0,035 ±0,030 ±0,020 ±0,040 ±0,035 ±0,025 YONGLI STEEL ±0,020 ± 0,025 1,50~2,50 TS EN ±0,040 ±0,035 ±0,025 ±0,050 ±0,040 ±0,030 YONGLI STEEL ±0,025 ±0,030 2,50~4,00 TS EN ±0,050 ±0,040 ±0,030 ±0,060 ±0,050 ±0,035 YONGLI STEEL ±0,030 ±0,035 Please contact us if you have any special requirements.                                 WIDTH TOLERANCES FOR SLIT EDGE (GK) Width Tolerances TS EN 10140 Production Width (mm) Nominal Thickness (mm) W < 125 125 <= W <= 250 250 < W A B A B A B 0,2 ~ 0,6 TS EN ± 0,15 ± 0,10 ± 0,20 ± 0,13 ± 0,25 ± 0,18 YONGLI STEEL ± 0,10 ± 0,13 ± 0,18 0,6 ~ 1,5 TS EN ± 0,20 ± 0,13 ± 0,25 ± 0,18 ± 0,30 ± 0,20 YONGLI STEEL ± 0,13 ± 0,18 ± 0,20 1,5 ~ 2,5 TS EN ± 0,25 ± 0,18 ± 0,30 ± 0,20 ± 0,35 ± 0,25 YONGLI STEEL ± 0,18 ± 0,20 ± 0,25 2,5 ~ 4,0 TS EN ± 0,30 ± 0,20 ± 0,35 ± 0,25 ± 0,40 ± 0,30 YONGLI STEEL ± 0,20 ± 0,25 ± 0,30 5, Applications: Product standard Applications   S50C(CK50/1050) - Measuring tape  65Si2Mn - Springs   - Structural parts of cameras 50CrV4 - Springs   - Chain parts 51CrV4 - Springs   - Springs SK4 (1095) - Measuring tape   - Clutch parts  - Razor blades   - Washers  - Pen points    - Safety buckles - Wind-up springs   S55C(CK55/1050) - Springs - Springs   - Safety shoes  - Cutlery   - Can openers  - Knitting needles   - Thompson blades SK5 (1085) - Measuring tape   - Structural parts of cameras - Gauges    S60C(CK60/1060) - Chain parts  - Springs    - Hand saws for woodworking - Cutlery    - Safety shoes  - Knitting needles    - Springs - Band saws for woodworking   - Office equipment parts   and lumbering    - Washers - Round saws   S65C(65MN/CK67) - Safety shoes - Office equipment parts   - Clutch parts S45C(CK45/1045) - Clutch parts    - Springs  - Chain parts   - Washers - Retainers   S75C(CK75/1075) - Clutch parts  - Washers   - Springs  S50C(CK50/1050) - Measuring tape    - Band saws - Structural parts of cameras       6, Our Mill: -Cold rolling mill 2HI, 4HI, 6HI-- 7 sets -Annlealing Furnace Hydrogen and Nitrogen-36 sets -EBNER lead quenching lines-2 sets -Water quenching lines-10 sets -Polish machines-4 sets -Slitting machines-8 sets -Pinch pass mill : 6 sets