50CrVA
Data verified50CrVA is China’s GB/T 1222 designation of the global 51CrV4 / AISI 6150 spring steel — the vanadium-bearing Cr spring grade for automotive suspension and valve springs.
Chemical composition
| Element | Content (%) |
|---|---|
| C | 0.46–0.54 |
| Si | 0.17–0.37 |
| Mn | 0.50–0.80 |
| P | ≤0.035 |
| S | ≤0.035 |
| Cr | 0.80–1.10 |
| V | 0.10–0.20 |
Weight percent, per the governing standard ranges. Actual values per heat are on the mill certificate.
Properties
| Hardness (Q&T) | 42–50 HRC typical |
| Density | 7.85 g/cm³ |
| Fatigue performance | Excellent — the premium automotive spring grade |
Heat treatment
Quench 850–870 °C oil; temper 400–500 °C class to spring hardness.
Equivalent grades
| Standard | Designation |
|---|---|
| din | 1.8159 (51CrV4) |
| aisi | 6150 |
| jis | SUP10 |
| gb | 50CrVA (GB/T 1222) |
Compare side by side: 50CrVA vs 6150
Equivalents overlap in chemistry and use but are not always identical — see our equivalents guide before substituting in certified designs.
Applications & Processing
Applications: Coil and leaf springs, torsion bars, valve springs, high-duty flat springs.
Processing: As 6150; decarburization control and shot peening decide fatigue life.
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Ask for a quotationVisit NasteelSource: GB/T 1222 published ranges · Last updated 2026-11-03. Data is indicative — verify critical values against the governing standard and mill certificate before use.