1. Overview
C75S belongs to the family of high carbon spring steels (C67S, C70, C75, C80, C85, C95), widely recognized for its excellent hardness, tensile strength, and elasticity after proper heat treatment.
Cgood Steel manufactures C75S high carbon steel strips in both cold-rolled annealed 和 hardened and tempered conditions, ensuring high precision in thickness, 宽度, and flatness tolerances.
2. Chemical Composition and Equivalent Grades
| 标准 | Equivalent Grades | C (%) | 锰 (%) | P max | S max | 和 (%) |
|---|---|---|---|---|---|---|
| 从 | CK75 | 0.72鈥?.80 | 0.50鈥?.80 | 鈮?.035 | 鈮?.035 | 0.17鈥?.37 |
The high carbon content (around 0.75%) allows C75S steel to achieve excellent hardness after hardening and tempering, while manganese and silicon enhance its strength and toughness.
Equivalent international grades include:
- 美国钢铁协会 1075 (USA)
- BS CS75 (UK)
- JIS SUP4 (Japan)
- EN C75 (欧洲)
3. Production Process
C75S strips from Cgood Steel are manufactured under strict quality control:
- Hot Rolled Steel Coils: Sourced from ISO-certified suppliers.
- Acid Pickling: Removes oxide scale and improves surface quality.
- Cold Rolling: Reduces thickness and enhances dimensional accuracy.
- Annealing (optional): Softens material and increases ductility.
- Hardening & 回火: Heat treatment for strength and elasticity.
- Slitting, 边缘处理, and Polishing: Achieve the required width, edge shape (slit, square, or rounded), and surface finish (自然的, 蓝色的, 黄色的, 抛光的).
Cgood Steel鈥檚 advanced facilities 鈥?including 4-high reversing cold rolling mills, continuous annealing furnaces, 和 precision levelling equipment 鈥?guarantee consistent mechanical properties and excellent surface flatness.
4. 机械性能
| Condition | 硬度 | 抗拉强度 (Approx.) | Typical Surface | Edge Type |
|---|---|---|---|---|
| 退火 | 鈮?80 高压 | 579 N/mm虏 | Bright or polished | 狭缝 / Mill |
| 硬化 & 历练 | 30鈥?5 HRC | up to 1700 N/mm虏 | Blue, Yellow, or Polished | 圆形 / 正方形 |
C75S strips can be customized according to application requirements in both 退火的 和 锻炼过的 states, with thickness ranging from 0.1mm鈥?.0毫米 and width up to 500毫米.
5. 应用领域
Due to its balance between strength and flexibility, C75S is used in a wide variety of mechanical and industrial fields:
- Spring Manufacturing:
Ideal for flat springs, shutter springs, and precision coil springs where resilience and shape memory are essential. - Saw Blade Production:
Commonly used for band saws, hacksaws, and circular saw blades due to high wear resistance and edge retention. - Hand Tools:
Applied in trowels, 刮刀, 油腻的刀, and other construction tools requiring durable, flexible steel. - Automotive Components:
Suitable for clutch washers, spring seats, and clips that undergo repeated mechanical stress.
6. Quality Control and Tolerances
Cgood Steel ensures strict dimensional and mechanical consistency.
厚度公差: 卤0.015mm鈥撀?.070mm depending on range.
宽度公差: 卤0.20mm鈥撀?.80毫米.
Flatness 和 straightness are verified under class R1鈥揜4 tolerances to guarantee uniform performance during stamping or coiling.
Each coil undergoes:
- Chemical composition analysis
- Hardness and tensile strength testing
- Visual and surface inspection
before being packed in 防锈纸, 塑料薄膜, and sealed for sea-worthy export.
7. Advantages of Cgood Steel鈥檚 C75S Strips
- Precise control of hardness and elasticity through heat treatment
- Excellent surface quality and dimensional accuracy
- Customizable thickness, 宽度, and edge profiles
- Proven performance in shutter springs and saw blade production
- 20+ years of manufacturing experience for industrial-grade steel strips
8. Packaging and Delivery
Each coil is lightly oiled, wrapped in plastic film and anti-rust paper, and securely packed into standard 20ft containers.
Customized packaging and labeling are available according to buyer specifications.
9. 关于西古德钢铁
Guangzhou Jiaxiao Material Technology Co., 有限公司.
is a professional manufacturer of high carbon steel strips, alloy steel strips, and stainless steel strips in both 硬化的 & 锻炼过的 和 cold-rolled annealed conditions.
With a 25,000 m虏 production area, over 100 skilled employees, and advanced rolling, annealing, and polishing equipment, Cgood Steel supplies more than 15,000 每年吨 to global industries including springs, blades, automotive parts, and tools.
