DIN 1.8988 Structural and constructional steels

Material group: Ferrous Alloys / Structural and constructional steels

Country/Standard: Germany / DIN

Data updates

Latest Update: 2025-01

Total number of updates: 11

Update History

2023-12 2022-08 2021-05 2021-04 2020-11 2019-12 2019-05 2016-03 2014-03 2013-12

This material has 2403 properties — only a subset is shown here.

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DIN 1.8988 Chemical Composition

CRITERIA

VALUE

UNIT

CAS NUMBER

CRITERIA

VALUE

≥ 0.015

UNIT

CAS NUMBER

7429-90-5

CRITERIA

VALUE

≤ 0.0050

UNIT

CAS NUMBER

7440-42-8

CRITERIA

VALUE

≤ 0.20

UNIT

CAS NUMBER

7440-44-0

CRITERIA

VALUE

val1

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

Other total

VALUE

val1

UNIT

CAS NUMBER

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

CRITERIA

VALUE

val1

UNIT

CAS NUMBER

7440-67-7

EN 10137-2: 1995 / Plates and wide flats made of high yield strength structural steels in the quenched and tempered or precipitation hardened conditions - Part 2: Delivery conditions for quenched and tempered steels

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DIN 1.8988 Physical Properties

Temperature

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

PROPERTY / VALUE

Modulus of Elasticity

190 — 213.6 GPa

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Density

7.67 — 7.86 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

37.63 W/(m∙°C)

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Heat Capacity

val1 J/(kg∙°C)

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This material has 2403 properties — only a subset is shown here.

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DIN 1.8988 Heat Treatments

If, due to regulations or for constructional reasons, stress relief annealing is necessary, it should be carried out at 530-580°C. If, in special cases, a higher temperature is to be used, the temperature must be 30°C lower than the actual tempering temperature, with a holding time of no more than 60 minutes.
Normalizing or hardening: heat at 880°C to 940°C, after reaching the temperature in the entire cross section, cool in water or oil.
Tempering: heat at 600°C to 730°C, hold for at least 30 minutes, cool in air.
Stress relief annealing: heat at 530°C to 580°C, hold at least 15 minutes for thickness 15 mm and under; 30 minutes at least for thickness 15 - 30 mm; 60 minutes at least for thickness 30 - 50 mm, and cool in air.

DIN 1.8988 Mechanical Properties

Temperature

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

PROPERTY / VALUE

Yield Strength, Rp0.2

540 MPa

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Tensile Strength

680 — 960 MPa

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Elongation, A

14 %

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Impact Energy

val1 J

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1265 Cross References

64 Composition
94 Mechanical Properties
70 Physical Properties
2 Heat Treatment
- Metallography
- Machinability

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

43 Joints
- Coatings
32 Dimensions
- Tribology

- Corrosion
- Ageing
- Weatherability
- Irradiation

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