China Ck75 Steel C75s C75 SAE 1075 spring steel strip

Short Description:

CK75 steel is equivalent to grade C75 C75s  SAE 1075 ,which is a high-carbon steel material, with C indicating a carbon content of 0.75%. Other main alloying elements include manganese, silicon, phosphorus, etc.


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CK75 steel  is a high-carbon steel material, with C indicating a carbon content of 0.75%. Other main alloying elements include manganese, silicon, phosphorus, etc.

The CK75 Steel has the following properties and applications:

Characteristic of CK75 Steel:

It has high yield strength and tensile strength and can withstand large tensile loads.

It has good mechanical properties and heat treatment properties, and is suitable for manufacturing springs that require high strength and wear resistance.

Its hardness can be adjusted through heat treatment to meet the needs of different application scenarios.

It has a certain magnetic permeability and can be used to manufacture electromagnetic components.

It has good corrosion resistance and can maintain good surface finish and weather resistance under certain conditions.

Application of CK75 Steel:

Automotive industry: used to manufacture automobile chassis springs and suspension system parts.

Machinery manufacturing: used to manufacture various mechanical springs, mechanical parts and tools.

Electronic and electrical fields: used to manufacture electromagnetic components and conductive springs.

Construction and furniture: used to manufacture door and window hardware accessories and furniture springs, etc.

Suitable for making very large springs, such as stacked leaf springs on bulldozers, large coil springs and large torsion springs on ships.

CK75 Steel are equivalent to AISI 1075 carbon steel include:

ASTM A29 (1075)

ASTM A510 (1075)

ASTM A713 (1075)

SAE J403 (1075)

SAE J412 (1075)

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

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