EN 18CrNiMo7-6 Structural and constructional steels

Material group: Ferrous Alloys / Structural and constructional steels

Country/Standard: European Union / EN

Data updates

Latest Update: 2024-12

Total number of updates: 9

Update History

2023-12 2020-12 2019-06 2018-10 2018-09 2018-08 2018-05 2015-05

This material has 319 properties — only a subset is shown here.

Unlock full material properties, including detailed values across temperatures and conditions.

EN 18CrNiMo7-6 Chemical Composition

CRITERIA

VALUE

UNIT

CAS NUMBER

CRITERIA

VALUE

0.15 – 0.21

UNIT

CAS NUMBER

7440-44-0

CRITERIA

VALUE

1.50 – 1.80

UNIT

CAS NUMBER

7440-47-3

CRITERIA

VALUE

0.50 – 0.90

UNIT

CAS NUMBER

7439-96-5

CRITERIA

VALUE

val1

UNIT

CAS NUMBER

7439-98-7

CRITERIA

VALUE

val1

UNIT

CAS NUMBER

7440-02-0

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 10084: 2008 / Case hardening steels - Technical delivery conditions

Looking for full material performance data?

EN 18CrNiMo7-6 Physical Properties

Temperature

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

PROPERTY / VALUE

Modulus of Elasticity

190 — 210 GPa

Unlock full details

Density

val1 kg/dm³

Unlock full details

Poisson Coefficient

val1

Unlock full details

Thermal Conductivity

38 W/(m∙°C)

Unlock full details

Heat Capacity

val1 J/(kg∙°C)

Unlock full details

Electrical Resistivity

0.18 Ω∙mm²/m

Unlock full details

Electrical Conductivity

val1 S/m

Unlock full details

This material has 319 properties — only a subset is shown here.

Unlock detailed physical values across temperatures and conditions.

EN 18CrNiMo7-6 Heat Treatments

End quench test austenitizing at 860 ± 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 810-850°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 830-870°C and Case-hardening at 780-820°C;

Tempering at 150-200°C (Time for tempering as a guide: 1h minimum).
End quench test: Quench from 860°C Carburizing: 880 to 980°C; NOTE: If steels are direct hardened, in general, a carburizing temperature of 950°C is not exceeded. For special procedures, for example under vacuum, higher temperatures (for example 1020 to 1050°C) are not unusual. Core hardening: 830 to 870°C; Case hardening: 780 to 820°C; Tempering: 150 to 200v (as a guide, for 1 hour minimum).

EN 18CrNiMo7-6 Mechanical Properties

Temperature

0 - 30°C

PROPERTY / VALUE

Tensile Strength

800 MPa

Unlock full details

Brinell Hardness (HB)

149 — 280

Unlock full details

Grain Size

Fine grain steel shall have an austenite grain size of 5 or finer. Sampling and sample preparation shall be as specified in ISO 643. The grain size shall be determined from a carburized specimen. Carburization shall be achieved by maintaining the specimen in carburizing powder at 950°C ± 10°C for 6 h. This is generally done by keeping the carburizing chamber at 950°C ± 10°C for 8 h, including a preheating period. In most cases, a carburized layer of approximately 1 mm is obtained.; Grain size of 5 or finer in accordance with ISO 653.; Steel shall have an austenite grain size of 5 or finer in accordance with ISO 643.

Unlock full details

Need complete mechanical properties to make the right choice?

Get complete data on strength, hardness, fatigue, and more.

Optimize material selection for your application - Book a Demo

95 Cross References

49 Composition
46 Mechanical Properties
14 Physical Properties
11 Heat Treatment
13 Metallography
- Machinability

- Stress-Strain
- Formability
5 Fatigue
- Fracture
- Creep

- Joints
- Coatings
2 Dimensions
- Tribology

- Corrosion
- Ageing
- Weatherability
- Irradiation

84 Total Suppliers