1. Обзор
C75S belongs to the family of high carbon spring steels (C67S, C70S, C75S, C80, C85s, C95S), widely recognized for its excellent hardness, предел прочности, and elasticity after proper heat treatment.
Jiaxiao MTC производит C75S high carbon steel strips в обоих холоднокатаный отожженный и закаленный и закаленный условия, ensuring high precision in thickness, ширина, and flatness tolerances.
2. Химический состав и эквивалентные марки
| Стандартный | Эквивалентные оценки | С (%) | Мин. (%) | Р макс. | S макс. | И (%) |
|---|---|---|---|---|---|---|
| ОТ | СК75 | 0.72–0,80 | 0.50–0,80 | ≤0,035 | ≤0,035 | 0.17–0,37 |
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:
- АИСИ 1075 (США)
- BS CS75 (Великобритания)
- JIS SUP4 (Япония)
- EN C75 (Европа)
3. Производственный процесс
C75S strips from Jiaxiao MTC are manufactured under strict quality control:
- Hot Rolled Steel Coils: Sourced from ISO-certified suppliers.
- Кислотное травление: Removes oxide scale and improves surface quality.
- Холодная прокатка: Reduces thickness and enhances dimensional accuracy.
- Отжиг (optional): Softens material and increases ductility.
- Закалка & Закалка: Heat treatment for strength and elasticity.
- Slitting, Edge Treatment, and Polishing: Achieve the required width, edge shape (щель, квадрат, or rounded), and surface finish (естественный, синий, желтый, полированный).
Jiaxiao MTC’s advanced facilities — including 4-high reversing cold rolling mills, continuous annealing furnaces, и precision levelling equipment — guarantee consistent mechanical properties and excellent surface flatness.
4. Механические свойства
| Состояние | Твердость | Предел прочности (Approx.) | Typical Surface | Тип края |
|---|---|---|---|---|
| Отожженный | ≤180 HV | 579 N/mm² | Bright or polished | щель / Мельница |
| Закаленный & Закаленный | 30–55 HRС | до 1700 N/mm² | Синий, Желтый, or Polished | Закругленный / Квадрат |
C75S strips can be customized according to application requirements in both отожженный и закаленный states, with thickness ranging from 0.1mm–5.0mm and width up to 500мм.
5. Приложения
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 ленточные пилы, hacksaws, and circular saw blades due to high wear resistance and edge retention. - Ручные инструменты:
Applied in мастерки, скребки, шпатели, and other construction tools requiring durable, flexible steel. - Автомобильные компоненты:
Suitable for clutch washers, spring seats, and clips that undergo repeated mechanical stress.
6. Quality Control and Tolerances
Jiaxiao MTC ensures strict dimensional and mechanical consistency.
Допуск по толщине: ±0.015mm–±0.070mm depending on range.
Допуск по ширине: ±0.20mm–±0.80mm.
Flatness и straightness are verified under class R1–R4 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 anti-rust paper, пластиковая пленка, and sealed for sea-worthy export.
7. Advantages of Jiaxiao MTC’s C75S Strips
- Precise control of hardness and elasticity through heat treatment
- Excellent surface quality and dimensional accuracy
- Customizable thickness, ширина, and edge profiles
- Proven performance in shutter springs and saw blade production
- 20+ years of manufacturing experience for industrial-grade steel strips
8. Упаковка и доставка
Каждая катушка lightly oiled, завернутый в полиэтиленовую пленку и антикоррозийную бумагу, and securely packed into standard 20ft containers.
Customized packaging and labeling are available according to buyer specifications.
9. О Цзясяо МТС
Guangzhou Jiaxiao Material Technology Co., ООО.
является профессиональным производителем полосы из высокоуглеродистой стали, полоски из легированной стали, и полоски из нержавеющей стали в обоих закаленный & закаленный и холоднокатаный отожженный условия.
With a 25,000 m² production area, over 100 skilled employees, and advanced rolling, отжиг, and polishing equipment, Jiaxiao MTC supplies more than 15,000 тонны в год to global industries including springs, лезвия, автомобильные детали, and tools.
