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ALLOY STEELS
CARBON SPRING STEEL
Carbon spring steel products have been popular for many years for different sectors. They are used in numerous applications such as household appliances, refrigerators, washing machines, dishwashers, dryers, other small household appliances, automobiles, exposed and non-exposed parts, electric motors and bathtubs.
Carbon Spring Steel
Today’s carbon spring steel products perform much better than those used in the past. They offer a better product application of thickness, shape, width, surface finish and other special quality characteristics that complement the emerging need for highly engineered end-use applications. To meet a variety of end-use requirements, carbon spring steel products are metallurgically engineered to provide specific qualities such as high formability, deep drawability, high strength, good magnetic properties, enamelability and paintability.
What are the Characteristics of Carbon Spring Steel?
Carbon spring steel can generally be characterised by the following features:
- Better finished surfaces with closer tolerances
- Smooth surfaces, often oily to the touch
- Carbon spring steels have better concentric homogeneity and flatness
- Popular use in more delicate applications or where aesthetics are important
C60 (CK 60) Carbon Spring Steel
CS60S carbon spring steel alloy is a special spring steel with reduced sulphur and phosphorus content used for wear-resistant, heavy-duty parts such as axles, rollers, shafts, spring rings and flat springs up to 6 mm thick. Annealed, easy to machine and cut.
Areas of Use: It is used in white goods, automotive, construction and electronics sectors. ⤋
Standard Comparison
| EN 10132 | UNI | DIN | AFNOR | BS | SAE/AISI |
|---|---|---|---|---|---|
| C60 | C60 | CK60 | XC60 | CS60 | 1060 |
Chemical Composition (%)
| C | Mn | Si | Cr | Ni | V |
|---|---|---|---|---|---|
| 0.57-0.65 | 0.60-0.90 | 0.15-0.35 | Max 0.40 | Max 0.40 | - |
Mechanical Properties
| Tensile Strength (MPa) | Elongation (%) | Hardness (HV) |
|---|---|---|
| 620 | 17 | 200 |
C67 (CK 67) Carbon Spring Steel
C67S is a low hardening capacity carbon spring steel designed for less loaded springs. It is used as tool steel for valve springs, coupling springs, shock absorbers, hammers, punches, rakes, chisels, flat springs, adjustable steel washers and other spring elements. C67S carbon spring steel is not weldable, is prone to decarburisation and oxidation during heat treatment and is not resistant to atmospheric corrosion.
Areas of Use: It is used in sectors such as Automotive, White Goods, Construction and Electronics. ⤋
Standard Comparison
| EN 10132 | UNI | DIN | AFNOR | BS | SAE/AISI |
|---|---|---|---|---|---|
| C67 | C67 | CK67 | XC68 | CS70 | 1070 |
Chemical Composition (%)
| C | Mn | Si | Cr | Ni | V |
|---|---|---|---|---|---|
| 0.65-0.73 | 0.60-0.90 | 0.15-0.35 | Max 0.40 | Max 0.40 | - |
Mechanical Properties
| Tensile Strength (MPa) | Elongation (%) | Hardness (HV) |
|---|---|---|
| 640 | 16 | 200 |
51CrV4 (50CrV4) Carbon Spring Steel
51CrV4 carbon spring steel, unlike other carbon and alloy grades, is characterised by high hardness, low sensitivity to annealing, resistance to variable and heavy loads and the ability to operate at high temperatures up to 300℃.
Areas of Use: It is frequently preferred in the automotive and industrial sector due to its high wear resistance. ⤋
Standard Comparison
| EN 10132 | UNI | DIN | AFNOR | BS | SAE/AISI |
|---|---|---|---|---|---|
| 51CrV4 | 50CrV4 | 50CrV4 | 50CrV4 | 50CrV4 | 50CrV4 |
Chemical Composition (%)
| C | Mn | Si | Cr | Ni | V |
|---|---|---|---|---|---|
| 0.47-0.55 | 0.70-1.10 | Max 0.40 | 0.90 - 1.20 | Max 0.40 | 0.10-0.25 |
Mechanical Properties
| Tensile Strength (MPa) | Elongation (%) | Hardness (HV) |
|---|---|---|
| 700 | 13 | 220 |
C75S (CK 75) Carbon Spring Steel
C75S is a low hardening capacity carbon spring steel for light springs for oil hardening. It is characterised by resistance to wear and high strength. It is used for low load springs, spring parts, clock springs, stone cutting saws in strip and plate form. Not weldable, resistant to temper embrittlement, prone to decarburisation and oxidation during heat treatment.
Areas of Use: It is frequently preferred in automotive and white goods sector. ⤋
Standard Comparison
| EN 10132 | UNI | DIN | AFNOR | BS | SAE/AISI |
|---|---|---|---|---|---|
| C75S | C75 | CK75 | XC75 | - | 1075 |
Chemical Composition (%)
| C | Mn | Si | Cr | Ni | V |
|---|---|---|---|---|---|
| 0.70-0.80 | 0.60-0.90 | 0.15 - 0.35 | Max 0.40 | Max 0.40 | - |
Mechanical Properties
| Tensile Strength (MPa) | Elongation (%) | Hardness (HV) |
|---|---|---|
| 1200 - 1900 | 15 | 370-580 |
