Spring Steel
51CrV4 · 1.8159
Also known as 6150 / 50CrV4
Chromium-vanadium spring steel for high-duty springs and tools.
51CrV4 (material 1.8159, equivalent to AISI 6150) is a chromium-vanadium spring steel with high strength, fatigue resistance and good hardenability, used for heavy-duty coil and leaf springs, torsion bars and hand tools.
International equivalents.
The same steel by country and standard — near matches; mill certificate governs.
Chemical composition.
Indicative, % by weight per EN 10089. Mill certificate governs.
| Element | % |
|---|---|
| C | 0.47 – 0.55 |
| Si | ≤ 0.40 |
| Mn | 0.70 – 1.10 |
| Cr | 0.90 – 1.20 |
| V | 0.10 – 0.25 |
Mechanical properties.
Indicative values for a reference section and heat-treatment condition. Actual properties vary with dimension and treatment, and are confirmed on the mill certificate.
Available forms.
Size: Ø 8 – 200 mm · flats, plates & sheet to specification
Typical applications.
- Coil & leaf springs
- Torsion bars
- Hand tools
- High-fatigue parts
FAQ.
What is 51CrV4?
51CrV4 (material 1.8159, equivalent to AISI 6150) is a chromium-vanadium spring steel with high strength, fatigue resistance and good hardenability, used for heavy-duty coil and leaf springs, torsion bars and hand tools.
Is 51CrV4 the same as 6150?
Yes — 51CrV4 and 6150, 50CrV4 are matching designations for the same steel across different standards (EN, AISI/SAE, JIS, GB, former DIN). They are near equivalents and may differ slightly in chemistry, so the mill certificate governs the exact specification.
What are the international equivalents of 51CrV4?
51CrV4 corresponds to 51CrV4 (1.8159) (EN), 6150 (AISI / SAE), 50CrV4 (former DIN). Equivalents are nearest matches by country/standard; the mill certificate governs the exact specification.
In which forms is 51CrV4 available?
51CrV4 is supplied as Round bar, Flat bar, Bright / cold-drawn bar, in Ø 8 – 200 mm (bar diameter; flats, plates and sheet are quoted to specification).
What is 51CrV4 used for?
Typical applications include Coil & leaf springs, Torsion bars, Hand tools, High-fatigue parts.