DIN 1.4903 Structural and constructional steels

Material group: Ferrous Alloys / Structural and constructional steels

Country/Standard: Germany / DIN

Data updates

Latest Update: 2024-10

Total number of updates: 24

Update History

2024-09 2024-05 2022-08 2022-04 2022-01 2021-09 2020-12 2020-11 2020-06 2020-02 2019-10 2019-09 2018-11 2018-10 2018-05 2017-05 2017-02 2015-07 2015-06 2015-01 2014-10 2014-04 2014-03

This material has 997 properties — only a subset is shown here.

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DIN 1.4903 Chemical Composition

CRITERIA

VALUE

UNIT

CAS NUMBER

CRITERIA

VALUE

≤ 0.040

UNIT

CAS NUMBER

7429-90-5

CRITERIA

VALUE

0.08 – 0.12

UNIT

CAS NUMBER

7440-44-0

CRITERIA

VALUE

8.0 – 9.5

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

7727-37-9; 17778-88-0

CRITERIA

VALUE

val1

UNIT

CAS NUMBER

7440-03-1

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 10222-2: 2017 / Steel forgings for pressure purposes - Part 2: Ferritic and martensitic steels with specified elevated temperature properties

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DIN 1.4903 Physical Properties

Temperature

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

PROPERTY / VALUE

Modulus of Elasticity

190 — 218 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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Thermal Conductivity

26 W/(m∙°C)

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Heat Capacity

val1 J/(kg∙°C)

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Electrical Resistivity

0.5 Ω∙mm²/m

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Electrical Conductivity

val1 S/m

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This material has 997 properties — only a subset is shown here.

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DIN 1.4903 Heat Treatments

Quenching and tempering: Hardened at 1040-1080°C, quenched in oil (for wt < 80 mm can be cooled in air or in controlled atmosphere).
Tempered at 750-780°C, held for 2 min per mm thickness, minimum 60 min, cooled in air.
Tempering after welding: heated at 740 to 770°C, held for 2 min per mm thickness, minimum 60 min, cooled in air.
Hardening and tempering:
Hardening: 1040-1080°C, cooling in air (For wt > 80 mm cooling can be carried out in oil or in spray water); Tempering: 750-780°C, holding period min. 60 minutes (Holding time starts when the temperature in the cross section is reached), cooling in air;

Tempering after welding: 740-770°C, holding period for wt ≤ 8 mm is 30 minutes, for 8 < wt ≤ 30 mm is 60 minutes and for wt > 30 mm is 2 min/mm, cooling in air;

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

DIN 1.4903 Mechanical Properties

Temperature

≤ 0°C 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

520 — 850 MPa

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Elongation, A

17 %

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Reduction of Area

val1 %

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Impact Energy

val1 J

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125 Cross References

106 Composition
333 Mechanical Properties
82 Physical Properties
8 Heat Treatment
8 Metallography
- Machinability

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

36 Joints
- Coatings
174 Dimensions
- Tribology

- Corrosion
1 Ageing
- Weatherability
- Irradiation

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