52CrMoV4, 51CrMoV4, 1.7701, AISI 4150 - spring steel

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Standards and chemical composition Specification Properties Treatment Replacements

52CrMoV4, 51CrMoV4, 1.7701, AISI 4150 - spring steel according to EN 10089:2005

Standard	Grade
	Chemical composition %
	C:	Si;	Mn:	P:	S:	Cr:	Mo:	V:
EN	52CrMoV4 / 1.7701
EN	0,48-0,56	<0,4	0,7-1,1	<0,025	<0,025	0,9-1,2	0,15-0,30	0,1-0,2
EN	51CrMoV4
EN	0,48-0,56	0,15-0,40	0,7-1,0	<0,035	<0,035	0,9-1,2	0,15-0,30	0,07-0,12
NF	51CDV4
NF	0,48-0,56	0,15-0,40	0,7-1,1	<0,025	<0,020	0,9-1,2	0,15-0,25	0,07-0,12
DIN	58CrMoV4
DIN	0,58-0,62	0,2-0,3	0,80-0,95	<0,020	<0,010	0,90-1,05	0,15-0,25	0,10-0,15
UNE	F-1460
UNE	0,48-0,56	0,15-0,40	0,7-1,0	<0,035	<0,035	0,9-1,2	0,15-0,25	0,07-1,12
ASTM	AISI 4150 - UNS G41500
ASTM	0,48-0,53	0,15-0,30	0,75-1,0	<0,035	<0,040	0,8-1,1	0,15-0,25	-

52CrMoV4, 51CrMoV4, 1.7701, AISI 4150 – description

Spring steel for quenching in oil, hard, ductile and hardenable. Used for all types of springs in the automotive industry with high strength requirements, including shock absorber springs, sealing rings and valve springs.

The strength and hardenability of 52CrMoV4 steel is strengthened not only by chromium and vanadium - as in the case of 51CrV4 / AISI 6150, but also by molybdenum. Molybdenum strengthens the solution during heat treatment, while chromium and vanadium form carbides that improve the hardness of the material during tempering.

Mechanical and Physical Properties - 52CrMoV4

Physical properties in ambient temperature:

Density: 7,79 g/cm³
Specific heat capacity: 470 J/kg-K
Melting temperature: 1420-1460 °C
Thermal conductivity: 44 W/m-K

Mechanical properties of 65S2WA steel:

Bars:
- Quenched and tempered (+QT):
  - Yield strength Re: > 1300 MPa
  - Tensile strength Rm: 1450-1750 MPa
  - Elongation A: > 6 %
  - Percent reduction of area Z: > 35 %
  - Impact Value KU: > 10 HB
  - With high shearability (+S):
    - Hardness HB: < 280
  - Annealed (+A):
    - Hardness HB: < 248
  - Spheroidized (+AC):
    - Hardness HB: < 230