China EN10132 Standard SAE1075 cold rolled carbon steel strip CK75 C75 C75S Spring steel strip Manufacturer and Supplier | Ruiyi

Short Description:

EN10132 Standard SAE1075 cold rolled carbon steel strip CK75 C75 C75S Spring steel strip has a carbon content of 0.7-0.8% making it a multi-purpose carbon steel with good spring properties. Therefore, it is a commonly used carbon steel in a wide range of engineering applications.

 


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EN10132 Standard SAE1075 cold rolled carbon steel strip CK75 C75 C75S Spring steel strip has a carbon content of 0.7-0.8% making it a multi-purpose carbon steel with good spring properties. Therefore, it is a commonly used carbon steel in a wide range of engineering applications.

SAE1075 or CK75 contains 0.7-0.8% carbon, 0.15-0.35% silicon, 0.6-0.9% manganese, and 0.03% phosphorus and sulphur. It has a tensile strength of 1230-1340 MPa, yield strength of 1130-1240 MPa, and a hardness of 57-63 HRC.

CK75 spring steel has better hardenability, the critical hardenable diameter in oil can reach 100~150mm. CK75 or C75 is Suitable for making very large springs, such as stacked leaf springs on bulldozers, large coil springs and large torsion springs on ships.

CK75 spring steel is a high-carbon steel material. Its chemical composition mainly includes carbon (C) content between 0.70-0.80%, silicon (Si) content between 0.10-0.35%, and manganese (Mn) content between 0.60-0.80%. Between 0.90%, the contents of phosphorus (P) and sulfur (S) are less than 0.025% respectively. CK75 spring steel has good elasticity and toughness and is often used to manufacture springs, blades, saw blades, knives and other parts and tools that require high strength and wear resistance.

C75 C75s CK75 SAE 1075 spring steel strip

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

spring steel strip

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
Top Metal STEEL ±0,008 ±0,010
0,25~0,40 TS EN ±0,020 ±0,015 ±0,010 ±0,025 ±0,020 ±0,012
Top Metal STEEL ±0,010 ±0,012
0,40~0,60 TS EN ±0,025 ±0,020 ±0,012 ±0,030 ±0,025 ±0,015
Top Metal STEEL ±0,015 ±0,015
0,60~1,00 TS EN ±0,030 ±0,025 ±0,015 ±0,035 ±0,030 ±0,020
Top Metal STEEL ±0,015 ±0,020
1,00~1,50 TS EN ±0,035 ±0,030 ±0,020 ±0,040 ±0,035 ±0,025
Top Metal STEEL ±0,020 ± 0,025
1,50~2,50 TS EN ±0,040 ±0,035 ±0,025 ±0,050 ±0,040 ±0,030
 Top Metal STEEL ±0,025 ±0,030
2,50~4,00 TS EN ±0,050 ±0,040 ±0,030 ±0,060 ±0,050 ±0,035
 Top Metal 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
TOP METAL 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
TOP METAL 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
TOP METAL 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
TOP METAL 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

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