EN 42CrMo4 Structural and constructional steels

Material group: Ferrous Alloys / Structural and constructional steels

Country/Standard: European Union / EN

Data updates

Latest Update: 2025-03

Total number of updates: 12

Update History

2024-12 2021-11 2020-07 2019-06 2018-09 2018-08 2018-01 2017-08 2017-04 2016-02 2014-04

This material has 2206 properties — only a subset is shown here.

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EN 42CrMo4 Chemical Composition

CRITERIA

VALUE

UNIT

CAS NUMBER

CRITERIA

VALUE

0.38 – 0.45

UNIT

CAS NUMBER

7440-44-0

CRITERIA

VALUE

0.90 – 1.20

UNIT

CAS NUMBER

7440-47-3

CRITERIA

VALUE

0.60 – 0.90

UNIT

CAS NUMBER

7439-96-5

CRITERIA

VALUE

val1

UNIT

CAS NUMBER

7439-98-7

CRITERIA

VALUE

val1

UNIT

CAS NUMBER

7723-14-0

CRITERIA

VALUE

val1

UNIT

CAS NUMBER

7704-34-9

CRITERIA

VALUE

val1

UNIT

CAS NUMBER

7440-21-3

EN 10083-1: 1991 / Quenched and tempered steels - Part 1: Technical delivery conditions for special steels (includes amendment A1:1996)

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EN 42CrMo4 Physical Properties

Temperature

0 - 30°C 30 - 100°C 100 - 300°C ≥ 300°C

PROPERTY / VALUE

Modulus of Elasticity

190 — 210 GPa

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Shear Modulus

val1 GPa

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Density

val1 kg/dm³

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Poisson Coefficient

val1

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Thermal Conductivity

33.5 W/(m∙°C)

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Heat Capacity

val1 J/(kg∙°C)

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Electrical Resistivity

0.19 Ω∙mm²/m

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Electrical Conductivity

val1 S/m

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This material has 2206 properties — only a subset is shown here.

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EN 42CrMo4 Heat Treatments

(+QT) Quenched: 820-860°C, cooled in oil or water, Tempered: 540-680°C.
Annealed (+A): 650-720°C Normalized (+N): 840-880°C Austenitized: 820-860°C Tempered: 540-680°C

EN 42CrMo4 Mechanical Properties

Temperature

≤ 0°C 0 - 30°C 30 - 100°C 100 - 300°C ≥ 300°C

PROPERTY / VALUE

Yield Strength, Rp0.2

val1 MPa

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Tensile Strength

600 — 1908.2 MPa

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Elongation, A

4 %

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Reduction of Area

val1 %

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Impact Energy

val1 J

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Brinell Hardness (HB)

≤ 300

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Rockwell Hardness (HR)

val1

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Vickers Hardness (HV)

val1

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Grain Size

val1

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705 Cross References

96 Composition
337 Mechanical Properties
28 Physical Properties
45 Heat Treatment
15 Metallography
- Machinability

136 Stress-Strain
71 Formability
14 Fatigue
- Fracture
- Creep

17 Joints
- Coatings
213 Dimensions
- Tribology

- Corrosion
- Ageing
- Weatherability
- Irradiation

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