51CrV4 spring steel bar is a chromium-vanadium alloy spring steel with high strength, good toughness and excellent fatigue resistance after heat treatment. It is used for springs, shafts, automotive suspension parts, mechanical blades and components requiring elastic performance and resistance to repeated loading. The material can be supplied as round bar, flat bar or forged bar in different heat treatment conditions.
Materials can be cut to required sizes according to customer specifications or project needs.
Different surface finishes can be supplied according to product type and application requirements.
Processing services such as cutting, machining, heat treatment or surface finishing can be arranged upon request.
Products are packed for international transportation with flexible delivery support for global buyers.
For high-strength springs, torsion bars, and elastic load-bearing components.
Suitable for applications such as automotive suspension springs, torsion bar springs, stabilizer bars, mechanical springs, elastic components for agricultural machinery, and heavy-duty elastic supports. Ideal for scenarios requiring high fatigue strength, good resilience, and impact resistance.|
Item |
Typical Information |
|
Product Name |
51CrV4 Spring Steel Bar |
|
Equivalent Grades |
51CrV4 / EN 1.8159 / AISI 6150 / SUP10 |
|
Product Form |
Round bar, flat bar, forged bar |
|
Standard Reference |
EN 10089, ASTM/JIS equivalent or customer specification |
|
Supply Condition |
Annealed, hot rolled, forged, quenched & tempered |
|
MOQ |
Usually 1 ton or negotiable for stock sizes |
|
Application |
Springs, suspension parts, shafts, elastic components |
|
Property |
Typical Range / Note |
|
Tensile Strength |
Depends on Q&T condition and size |
|
Yield Strength |
High after proper heat treatment |
|
Hardness |
Supplied according to annealed or Q&T condition |
|
Key Property |
High fatigue strength and elastic performance |
|
Note |
Final performance should be confirmed by heat treatment and MTC |
|
C |
Si |
Mn |
Cr |
V |
P |
S |
|
0.47–0.55 |
0.15–0.40 |
0.70–1.10 |
0.90–1.20 |
0.10–0.25 |
≤0.025 |
≤0.025 |
Q: What is 51CrV4 spring steel bar?
A: 51CrV4 also known as 1.8159 AISI 6150 SUP10 is chromium‑vanadium alloy spring steel under EN 10089 standard. It features high fatigue strength good toughness and thermal stability for high‑stress spring manufacturing.
Q: What sizes can you supply for 51CrV4 spring steel bar?
A: We provide 51CrV4 bar in diameter 8‑450mm, round square and flat profiles are available. Custom diameter and custom cut length are supported according to customer requirements.
Q: What processing conditions are available for 51CrV4?
A: Our 51CrV4 spring steel bar covers hot rolled forged and cold drawn status. Quenching and tempering heat treatment service can be offered to achieve target mechanical performance.
Q: What are main applications of 51CrV4 alloy spring steel bar?
A: 51CrV4 is widely used for automotive suspension springs valve springs railway parts agricultural machinery and heavy‑duty industrial spring components under cyclic load and vibration.
Q: Can you provide material test documents for 51CrV4 spring steel bar?
A: Yes. ISO 9001 certification and EN10204 3.1 test reports are available. Each batch will go through strict inspection before delivery to guarantee stable material property.
