EN 10277-5 Grade 42CrMoS4 – Premium Cold‑Drawn, Quenched & Tempered Steel for High‑Load Automotive & Machinery

Steel 42CrMoS4 is suitable for high loaded parts in vehicle, engine and machine engineering with high wear resistance and favorable core qualities as well as enhanced workability (e.g. crankshafts, pinions, balance shafts). The steel shows a high specific resistance to static and dynamic load. Lowest application temperature -40°C. As a bright steel product it is used in the form of bars, bright, straight, in various conditions (see DIN EN 10277 : 1999-10).

Properties

General

Property	Temperature	Value
Density	20.0 °C	7.85 g/cm³

Mechanical

Property	Temperature	Value
Elastic modulus	20.0 °C	210 GPa
	100.0 °C	205 GPa
	200.0 °C	195 GPa
	300.0 °C	185 GPa

Elongation	20.0 °C	11 - 12 %
Poisson's ratio	20.0 °C	0.28 [-]
Shear modulus	20.0 °C	81 GPa
Tensile strength	20.0 °C	900 - 1200 MPa
Yield strength Rp0.2	20.0 °C	650 - 750 MPa

Thermal

Property	Temperature	Value	Comment
Coefficient of thermal expansion	100.0 °C	1.11E-5 1/K
	200.0 °C	1.21E-5 1/K
	300.0 °C	1.29E-5 1/K
	400.0 °C	1.35E-5 1/K

Max service temperature, long		-40 - 0 °C
Melting point		1382 - 1529 °C	Typical for Chromium Molybdenum Steel
Specific heat capacity	20.0 °C	460 J/(kg·K)
Thermal conductivity	20.0 °C	42 W/(m·K)

Electrical

Property	Temperature	Value
Electrical resistivity	20.0 °C	1.9E-7 Ω·m

Chemical properties

Property	Value
Carbon	0.38 - 0.45 %
Chromium	0.9 - 1.2 %
Manganese	0.6 - 0.9 %
Molybdenum	0.15 - 0.3 %
Phosphorus	0.03 - 0.04 %
Silicon	0.4 %
Sulfur	0.02 - 0.04 %

EN 10277‑5 Grade 42CrMoS4 Quenched & Tempered Cold Drawn Steel – High‑Performance, Wear‑Resistant for Automotive & Machinery EN 10277-5 Grade 51CrV4 Steel – Quenched, Tempered & Turned (QT+SH) for High-Performance Applications

Metal