DIN 1.7378 Structural and constructional steels

Material group: Ferrous Alloys / Structural and constructional steels

Country/Standard: Germany / DIN

Data updates

Latest Update: 2022-04

Total number of updates: 5

Update History

2021-09 2020-03 2016-02 2014-02

This material has 336 properties — only a subset is shown here.

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DIN 1.7378 Chemical Composition

CRITERIA

VALUE

UNIT

CAS NUMBER

CRITERIA

VALUE

≤ 0.020

UNIT

CAS NUMBER

7429-90-5

CRITERIA

VALUE

0.0015 – 0.0070

UNIT

CAS NUMBER

7440-42-8

CRITERIA

VALUE

0.05 – 0.10

UNIT

CAS NUMBER

7440-44-0

CRITERIA

VALUE

val1

UNIT

CAS NUMBER

7440-47-3

CRITERIA

VALUE

val1

UNIT

CAS NUMBER

7439-96-5

CRITERIA

VALUE

val1

UNIT

CAS NUMBER

7439-98-7

CRITERIA

VALUE

val1

UNIT

CAS NUMBER

7727-37-9; 17778-88-0

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

7440-32-6

CRITERIA

VALUE

val1

UNIT

CAS NUMBER

7440-62-2

WB 533/2: 2013 / Heat-resistant 7CrMoVTiB10-10 steel, material No.1.7378; Seamless hollow body, seamless pipe

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DIN 1.7378 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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Dynamic Modulus of Elasticity

211 GPa

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Density

7.67 — 7.86 kg/dm³

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Poisson Coefficient

val1

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This material has 336 properties — only a subset is shown here.

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DIN 1.7378 Heat Treatments

Quenching and tempering:
Hardening: 980-1020°C, quenching in water;
Tempering: 740-770°C, holding period 2 minutes/mm thickness, at least 60 minutes (Holding time starts when the temperature in the cross section is reached) and cooling in air;

Stress relieving after welding: 740 ± 10°C, holding period 2 minutes/mm thickness, at least 60 minutes and cooling in air;

Stress relieving after cold forming: 650-750°C, holding period 2 minutes/mm thickness, at least 60 minutes and cooling in air.
Quenching and tempering:
Hardening: 980-1020°C, cooling in air for wt ≤ 16 mm, quenching in water for wt > 16 mm;
Tempering: 730-760°C, holding period 2 minutes/mm thickness, at least 60 minutes and cooling in air;

Stress relieving after welding: 720-760°C, holding period 2 minutes/mm thickness, at least 60 minutes and cooling in air;

Stress relieving after cold forming: 650-750°C, holding period 2 min/mm thickness, at least 60 minutes and cooling in air.

DIN 1.7378 Mechanical Properties

Temperature

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

PROPERTY / VALUE

Yield Strength, Rp0.2

430 MPa

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Tensile Strength

565 — 840 MPa

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Elongation, A

15 %

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Impact Energy

val1 J

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Vickers Hardness (HV)

val1

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51 Cross References

36 Composition
100 Mechanical Properties
41 Physical Properties
3 Heat Treatment
- Metallography
- Machinability

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

7 Joints
- Coatings
57 Dimensions
- Tribology

- Corrosion
- Ageing
- Weatherability
- Irradiation

40 Total Suppliers