51CrV4 steel is an alloy steel grade of EN chemical designation. The executing standard is EN 10083-3. 51CrV4 steel is a higher level of spring steel. It is a good choice to make springs with high load and big size cross-section. 51CrV4 steel chemical composition is as below.
EN standard 51CrV4 steel chemical composition:
| Grade | C | Si Max | Mn | P Max | S Max | Cr | V |
| 51CrV4 | 0.47-0.55 | 0.4 | 0.7-1.1 | 0.025 | 0.025 | 0.9-1.2 | 0.10-0.25 |
EN standard 51CrV4 steel chemical composition is close to the chemical composition of AISI 6150 steel, which is known as 51CrV4 steel equivalent.
The addition of vanadium in 51CrV4 steel chemical composition can refine grain size, reduce the overheating sensitivity, and improve the strength and toughness of 51CrV4 steel.
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