51CrV4 EN 10089-2002 Hot-rolled steel wire

Hot rolled steel for tempered spring is a kind of hot rolled steel specially used for the manufacture of springs and has been tempered. After it is rolled by high temperature heating, it is mainly used in the manufacture of springs in the tempered steel.

Hot rolled steel wire for tempering spring features:

1. High strength: After tempering treatment, the strength and hardness of steel are significantly improved, which can meet the requirements of use under high load conditions.

2. Good elasticity: The tempering treatment enables the steel to quickly return to its original shape after being stressed and maintain stable elastic properties.

3. Fatigue resistance: the tempered spring steel has high fatigue strength and can maintain stable performance under long-term alternating stress.

4. Good process performance: hot rolled steel has good machinability, which is convenient for subsequent cutting, bending, winding and other processing processes.

Material designation	51CrV4
European standard steel	1.8159
Correspondence standard	EN 10089-2002 Hot rolled steels for quenched and tempered springs; technical delivery conditions
Classify	Spring steels
Performance	Strength elasticity Fatigue resistance hardenability
Label	Structural alloy steel
Explain	51CrV4(1.8159) spring steel has good mechanical properties and process properties, high hardenability, adding vanadium to make the steel grain refinement, reduce overheating sensitivity, improve strength and toughness, with high fatigue strength, yield ratio is also high, but poor weldability, cold deformation plasticity is low. 51CrV4 is a higher grade spring steel, used as a large section of high load important springs and operating temperature<300 ℃ valve springs, piston springs, safety valve springs. Standard parts such as coil slotted cylindrical pins can also be manufactured. 51CrV4 corresponds to the German brand 50CrV4 (1.8159) and the French brand 51CrV4

Manufacturing technique:

1. Hot rolling: The steel is rolled and deformed at high temperature to form the required cross-section shape and size.

2. Tempering treatment: including quenching and tempering two steps. Quenching is the heating of steel above the critical temperature, and then rapid cooling to obtain martensitic structure; Tempering is to hold heat at a certain temperature for a period of time, so that the hardness and toughness of the steel can achieve the best balance.

51CrV4 Chemical Element Content (%)

Component	C	Si	Mn	P	S	Cr	V	More
Minimum value	0.47	-	0.7	-	-	0.9	0.1	Cu+10Sn± 0.60
Maximum	0.55	0.4	1.1	0.25	0.025	1.2	0.25	Cu+10Sn± 0.60

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