1. Tổng quan
50CRV4, known internationally as AISI 6150 or SUP10, is a chromium-vanadium alloy spring steel that combines high strength, elasticity, and toughness.
It is particularly suitable for automotive suspension springs, ly hợp, and high-stress mechanical components where resistance to fatigue and shock loading is critical.
Jiaxiao MTC produces 50CrV4 alloy steel strips in hardened and tempered or cold-rolled annealed conditions, ensuring precise control of hardness, bề mặt hoàn thiện, and dimensional tolerances.
2. Chemical Composition and Equivalent Grades
| Tiêu chuẩn | Equivalent Grades | C (%) | Mn (%) | Si (%) | Cr (%) | V. (%) | P max | S max |
|---|---|---|---|---|---|---|---|---|
| DIN | 50CRV4 | 0.47–0.55 | 0.70–1.10 | 0.15–0.40 | 0.90–1.20 | 0.10–0.25 | ≤0.035 | ≤0.035 |
| AISI | 6150 | — | — | — | — | — | — | — |
| Anh ta | SUP10 | — | — | — | — | — | — | — |
Chromium improves hardenability and wear resistance, while vanadium refines the grain structure, improving strength and fatigue performance.
3. Production and Heat Treatment Process
50CrV4 strips are produced through a multi-stage precision rolling and thermal treatment process:
- Hot Rolled Coils — sourced from ISO-certified steel mills.
- Acid Pickling — removal of oxidation and surface impurities.
- Cuộn lạnh — reduces thickness and enhances dimensional accuracy.
- Ủ (optional) — improves ductility for cold forming.
- Hardening and Tempering — precise heat treatment in controlled atmosphere furnaces.
- Hardening: Heated above the austenitizing temperature (approx. 850°C–880°C) and quenched.
- Ủ: Reheated to 400–600°C to achieve desired balance between hardness and toughness.
This sequence provides a fine-grained structure with uniform hardness and improved resilience under repeated stress.
4. Mechanical Properties
| Condition | Độ cứng | Độ bền kéo | Elastic Limit | Hoàn thiện bề mặt | Edge Options |
|---|---|---|---|---|---|
| Ăn | ≤200 HV | 600–800 N/mm² | Trung bình | Bright / Polished | Mill / Khe hở |
| Cứng & Nóng tính | 40–52 HRC | 1400–1800 N/mm² | Cao | Màu xanh da trời / Yellow / Polished | Square / Rounded |
Phạm vi độ dày: 0.1–5.0 mm
Phạm vi chiều rộng: 10–500 mm
Edge Finish: Khe hở, quảng trường, or rounded according to customer requirements.
5. Key Features of 50CrV4 Alloy Steel Strip
- Xuất sắc strength-to-weight ratio Và high fatigue resistance
- Stable spring properties under cyclic stress
- Superior Đang đeo điện trở Và shock absorption
- Consistent heat treatment response và khả năng gia công
- Uniform flatness achieved through precision levelling and tension control
6. Ứng dụng
50CrV4 alloy steel strips are widely used in industries requiring durability under dynamic loads Và controlled elasticity:
- Automotive Components
- Leaf springs, clutch plates, valve springs, and safety parts
- Máy móc công nghiệp
- Springs, discs, and precision washers
- Construction Tools
- Trowels, scrapers, and blades with high flexibility requirements
- Power Transmission
- Flexible couplings and dampening elements
Its combination of strength and toughness also makes it suitable for cold-forming operations prior to hardening and tempering.
7. Tolerances and Quality Control
Jiaxiao MTC follows strict tolerance classes according to DIN/EN standards:
- Thickness tolerance: ±0.015–0.070 mm
- Width tolerance: ±0.20–0.80 mm
- Straightness deviation: within R1–R4 class
- Flatness tolerance: ≤0.1–0.3% of strip width
All coils are tested for:
- Chemical composition (spectrometer analysis)
- Hardness and tensile strength (Vickers, Rockwell, and Brinell)
- Surface quality and microstructure
8. Packaging and Delivery
Each 50CrV4 coil is lightly oiled Và wrapped in anti-rust paper and plastic film, then placed on wooden pallets or into 20ft sea-worthy containers.
Customized packing and labeling available upon request.
9. About Jiaxiao MTC
Công ty TNHH Công nghệ Vật liệu Quảng Châu Jiaxiao, Ltd.
is a trusted manufacturer and exporter of high carbon, alloy, và dải thép không gỉ in both annealed Và cứng & tôi luyện forms.
Với hơn 20 years of experience and advanced facilities for cán nguội, ủ, làm dịu đi, and tempering, Jiaxiao MTC provides tailored steel solutions for automotive, spring, tool, and hardware industries.
