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; depends on dimension and heat treatment.
Available forms.
Size range: Ø 8 – 200 mm
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 is the European (EN) designation, while 6150, 50CrV4 are the matching names used in other countries and standards (for example AISI/SAE in the USA, JIS in Japan, GB in China, former DIN in Germany). They are near equivalents and may differ slightly in chemistry; 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.
What is 51CrV4 used for?
Typical applications include Coil & leaf springs, Torsion bars, Hand tools, High-fatigue parts.