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51CrV4 DIN EN 10089-2003 spring steel wire

51CrV4 DIN EN 10089-2003 spring steel wire

Material designation	51CrV4
German W-Nr.	1.8159
Correspondence standard	DIN EN 10089-2003 Hot-rolled steels for quenched and tempered springs
Classify	Spring steels
Performance	Strength elasticity Fatigue resistance hardenability
Label	Structural alloy steel
Explain	① Features and applications: 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 ② Physical properties: elastic modulus 210GPa; Shear modulus 80GPa. See DIN EN 10083-3-2006

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 value	0.55	0.4	1.1	0.025	0.025	1.2	0.25	Cu+10Sn ±0.60

51CrV4 Mechanical properties

Conditions	Heat treatment or condition	Tensile strength σb Mpa	Yield point σs Mpa	Elongation or elongation after breaking δ %	Reduction of area ψ %	Hardness HBW	Shock absorption energy KV2 J
Rods, rods	Quenching and tempering (+QT)	1350~1650	≥1200	≥6	≥30	-	KU ≥8
Rods, rods	Cold shear treatment (+S)	-	-	-	-	≤280	-
Rods, rods	Softening annealing (+A)	-	-	-	-	≤248	-
Rods, rods	Spheroidizing annealing (+AC)	-	-	-	-	≤230	-

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