VdTÜV 20 MnMoNi 4-5 Structural and constructional steels

Material group: Ferrous Alloys / Structural and constructional steels

Country/Standard: Germany / VdTÜV

Data updates

Latest Update: 2020-03

Total number of updates: 4

Update History

2019-09 2014-07 2014-06

This material has 327 properties — only a subset is shown here.

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VdTÜV 20 MnMoNi 4-5 Chemical Composition

CRITERIA

VALUE

UNIT

CAS NUMBER

CRITERIA

VALUE

0.010 – 0.050

UNIT

CAS NUMBER

7429-90-5

CRITERIA

VALUE

0.17 – 0.23

UNIT

CAS NUMBER

7440-44-0

CRITERIA

VALUE

≤ 0.20

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

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

WB 440/3: 2016 / Heat resistant quenched and tempered steel 20 MnMoNi 4-5; Material No. 1.6311; Hollow body, flange, ring, forging, bar steel

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VdTÜV 20 MnMoNi 4-5 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

val1 GPa

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Density

7.67 — 7.86 kg/dm³

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Poisson Coefficient

val1

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Thermal Conductivity

44 W/(m∙°C)

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This material has 327 properties — only a subset is shown here.

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VdTÜV 20 MnMoNi 4-5 Heat Treatments

Quenching and tempering: Hardened at 870-940°C, after reaching the temperature in the entire cross-section. Cooled in air, quenched in oil or water according to the thickness.
Tempered at 610-690°C, held for at least 30 min, cooled in still air or in furnace.

Stress relieving: Heated at 580-620°C, holding time for:

t ≤ 15 mm ( ≥ 15 min.)

15 < t ≤ 30 mm ( ≥ 30 min.)

30 < t ≤ 350 mm ( ≥ 60 min.)

t > 350 mm (approx. 120 min)
Quenched and tempered - Hardened: 870 to 940°C, after reaching the temperature at total cross-sectional quenching in water. With three-stage hardening, the second hardening temperature is 750 to 800°C.
Tempered: 630 to 680°C, holding time at least 30 min, cooling, in still air or in a furnace.
Stress relieving: Heated at 580-620°C, holding time for:

t ≤ 15 mm ( ≥ 15 min.)

15 < t ≤ 30 mm ( ≥ 30 min.)

30 < t ≤ 350 mm ( ≥ 60 min.)

t > 350 mm (approx. 120 min)

Soak and hold within the temperature range of 580 to 620°C. Measurement of the temperature on the component surface. The maximum holding time for the usual stress-relief annealing is 150 minutes. With a holding time > 90 min or in the case of multiple annealing, the lower limit of the temperature range should be aimed for.

VdTÜV 20 MnMoNi 4-5 Mechanical Properties

Temperature

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

PROPERTY / VALUE

Yield Strength, Rp0.2

390 MPa

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Tensile Strength

560 — 700 MPa

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Elongation, A

18 %

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Impact Energy

val1 J

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142 Cross References

11 Composition
28 Mechanical Properties
17 Physical Properties
2 Heat Treatment
- Metallography
- Machinability

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

25 Joints
- Coatings
1 Dimensions
- Tribology

- Corrosion
- Ageing
- Weatherability
- Irradiation

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