DIN 1.7779 Structural and constructional steels

Material group: Ferrous Alloys / Structural and constructional steels

Country/Standard: Germany / DIN

Data updates

Latest Update: 2024-07

Total number of updates: 18

Update History

2024-03 2024-01 2023-12 2023-09 2023-02 2023-01 2022-12 2022-11 2021-08 2021-07 2021-05 2020-03 2018-12 2018-08 2017-02 2014-05 2014-04

This material has 399 properties — only a subset is shown here.

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DIN 1.7779 Chemical Composition

CRITERIA

VALUE

UNIT

CAS NUMBER

CRITERIA

VALUE

≤ 0.040

UNIT

CAS NUMBER

7429-90-5

CRITERIA

VALUE

0.17 – 0.23

UNIT

CAS NUMBER

7440-44-0

CRITERIA

VALUE

3.00 – 3.30

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

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

CRITERIA

VALUE

val1

UNIT

CAS NUMBER

7440-62-2

EN 10216-2: 2024 / Seamless steel tubes for pressure purposes - Technical delivery conditions - Part 2: Non-alloy and alloy steel tubes with specified elevated temperature properties

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DIN 1.7779 Physical Properties

Temperature

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

PROPERTY / VALUE

Modulus of Elasticity

190 — 210 GPa

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Dynamic Modulus of Elasticity

val1 GPa

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Density

val1 kg/dm³

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Poisson Coefficient

val1

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Coefficient of Thermal Expansion (CTE)

val1 10^-6/°C

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Thermal Conductivity

25.7 W/(m∙°C)

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Heat Capacity

val1 J/(kg∙°C)

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Electrical Resistivity

0.405 Ω∙mm²/m

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Electrical Conductivity

val1 S/m

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This material has 399 properties — only a subset is shown here.

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DIN 1.7779 Heat Treatments

Heat treatment (V): Hot forming at 1100 - 850°C. In the process, the temperature may drop to 750°C. Hardening at 980 - 1030°C. Tempering at 680 - 730°C.
Quenched and tempered (+QT): 980-1030°C, air or liquid cooling. Tempering: 680-730°C, air cooling.

DIN 1.7779 Mechanical Properties

Temperature

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

686.5 — 882.6 MPa

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Elongation, A

12 %

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Impact Energy

val1 J

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Brinell Hardness (HB)

205 — 265

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47 Cross References

27 Composition
57 Mechanical Properties
63 Physical Properties
4 Heat Treatment
- Metallography
- Machinability

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

- Joints
- Coatings
153 Dimensions
- Tribology

- Corrosion
- Ageing
- Weatherability
- Irradiation

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