DIN 20MoCrS4 Structural and constructional steels

Material group: Ferrous Alloys / Structural and constructional steels

Country/Standard: Germany / DIN

Data updates

Latest Update: 2025-02

Total number of updates: 6

Update History

2024-03 2020-05 2018-10 2018-01 2015-04

This material has 290 properties — only a subset is shown here.

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DIN 20MoCrS4 Chemical Composition

CRITERIA

VALUE

UNIT

CAS NUMBER

CRITERIA

VALUE

0.020 – 0.050

UNIT

CAS NUMBER

7429-90-5

CRITERIA

VALUE

0.17 – 0.23

UNIT

CAS NUMBER

7440-44-0

CRITERIA

VALUE

0.30 – 0.60

UNIT

CAS NUMBER

7440-47-3

CRITERIA

VALUE

val1

UNIT

CAS NUMBER

7440-50-8

CRITERIA

VALUE

val1

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 10263-3: 2017 / Steel rod, bars and wire for cold heading and cold extrusion - Part 3: Technical delivery conditions for case hardening steels

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DIN 20MoCrS4 Physical Properties

Temperature

0 - 30°C

PROPERTY / VALUE

Modulus of Elasticity

190 — 210 GPa

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Density

7.67 — 7.86 kg/dm³

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Poisson Coefficient

0.27 — 0.3

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This material has 290 properties — only a subset is shown here.

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DIN 20MoCrS4 Heat Treatments

End quench test austenitizing at 910 ± 5°C (Time for austenitizing as a guide: 30 min minimum);

Carburizing at 880-980°C (The carburizing temperature depends on the chemical composition of the steel, the mass of the product and the carburizing medium. If the steels are direct hardened, in general, a temperature of 950°C is not exceeded. For special procedures, for example under vacuum, higher temperatures (for example 1020-1050°C) are not unusual);

Direct and simple hardening at 820-860°C (The kind of quenching agent depends on, for example the shape of the products, the cooling conditions and the amount of furnace filling. If the steels are direct hardened and if there is a danger of distortion, they should be quenched from a temperature between the core-hardening and case-hardening temperatures);

Double hardening: Core-hardening at 860-900°C and Case-hardening at 780-820°C;

Tempering at 150-200°C (Time for tempering as a guide: 1h minimum).
Carburizing at 880 - 980°C. Core-hardening at 860 - 900°C, case hardening at 780 - 820°C, quenching. Tempering at 150 - 200°C.

DIN 20MoCrS4 Mechanical Properties

Temperature

0 - 30°C

PROPERTY / VALUE

Tensile Strength

540 MPa

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Reduction of Area

57 %

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Brinell Hardness (HB)

140 — 287

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Grain Size

val1

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109 Cross References

38 Composition
39 Mechanical Properties
3 Physical Properties
7 Heat Treatment
- Metallography
- Machinability

- Stress-Strain
- Formability
3 Fatigue
- Fracture
- Creep

- Joints
- Coatings
- Dimensions
- Tribology

- Corrosion
- Ageing
- Weatherability
- Irradiation

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