20 MnMoNi 4-5 (Germany / VdTÜV) Material Properties

Other designations:
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

Mechanical Properties

Temperature

≤ 0°C
0 - 30°C
30 - 100°C
100 - 300°C
≥ 300°C
PROPERTY / VALUE
Yield Strength, Rp0.2 390 MPa view details
Yield Strength, Rp0.2 val1
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MPa view details
Yield Strength, Rp0.2 val1
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MPa view details
Yield Strength, Rp0.2 val1
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MPa view details
Tensile Strength 560 — 700 MPa view details
Elongation, A 18 % view details
Impact Energy val1
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J view details
Impact Energy val1
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J view details
Yield Strength, Rp0.2 56.6 ksi view details
Yield Strength, Rp0.2 val1
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ksi view details
Yield Strength, Rp0.2 val1
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ksi view details
Yield Strength, Rp0.2 val1
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ksi view details
Tensile Strength 81.2 — 101.5 ksi view details
Elongation, A 18 % view details
Impact Energy val1
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ft·lb view details
Impact Energy val1
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ft·lb view details

Physical Properties

Temperature

0 - 30°C
30 - 100°C
100 - 300°C
≥ 300°C
PROPERTY / VALUE
Modulus of Elasticity 190 — 210 GPa view details
Dynamic Modulus of Elasticity val1
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GPa view details
Dynamic Modulus of Elasticity val1
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GPa view details
Dynamic Modulus of Elasticity val1
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GPa view details
Dynamic Modulus of Elasticity val1
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GPa view details
Density 7.67 — 7.86 kg/dm³ view details
Poisson Coefficient val1
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Coefficient of Thermal Expansion (CTE) val1
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10-6/°C view details
Coefficient of Thermal Expansion (CTE) val1
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10-6/°C view details
Coefficient of Thermal Expansion (CTE) val1
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10-6/°C view details
Thermal Conductivity 44 W/(m∙°C) view details
Thermal Conductivity val1
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W/(m∙°C) view details
Thermal Conductivity val1
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W/(m∙°C) view details
Thermal Conductivity val1
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W/(m∙°C) view details
Modulus of Elasticity 27.6 E+03 — 30.5 E+03 ksi view details
Dynamic Modulus of Elasticity val1
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ksi view details
Dynamic Modulus of Elasticity val1
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ksi view details
Dynamic Modulus of Elasticity val1
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ksi view details
Dynamic Modulus of Elasticity val1
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ksi view details
Density 0.277 — 0.284 lb/in³ view details
Poisson Coefficient val1
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view details
Coefficient of Thermal Expansion (CTE) val1
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10-6/°F view details
Coefficient of Thermal Expansion (CTE) val1
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10-6/°F view details
Coefficient of Thermal Expansion (CTE) val1
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10-6/°F view details
Thermal Conductivity 25.4 BTU/(h∙ft∙°F) view details
Thermal Conductivity val1
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BTU/(h∙ft∙°F) view details
Thermal Conductivity val1
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BTU/(h∙ft∙°F) view details
Thermal Conductivity val1
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BTU/(h∙ft∙°F) view details

Composition

CRITERIA
VALUE
UNIT
CAS NUMBER
CRITERIA
Al
VALUE
0.010 – 0.050
UNIT
%
CAS NUMBER
7429-90-5
CRITERIA
C
VALUE
0.17 – 0.23
UNIT
%
CAS NUMBER
7440-44-0
CRITERIA
Cr
VALUE
≤ 0.20
UNIT
%
CAS NUMBER
7440-47-3
CRITERIA
Mn
VALUE
val1
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UNIT
%
CAS NUMBER
7439-96-5
CRITERIA
Mo
VALUE
val1
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UNIT
%
CAS NUMBER
7439-98-7
CRITERIA
N
VALUE
val1
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UNIT
%
CAS NUMBER
7727-37-9; 17778-88-0
CRITERIA
Ni
VALUE
val1
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UNIT
%
CAS NUMBER
7440-02-0
CRITERIA
P
VALUE
val1
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UNIT
%
CAS NUMBER
7723-14-0
CRITERIA
S
VALUE
val1
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UNIT
%
CAS NUMBER
7704-34-9
CRITERIA
Si
VALUE
val1
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UNIT
%
CAS NUMBER
7440-21-3
CRITERIA
V
VALUE
val1
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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

Heat Treatments

  • <b>Quenching and tempering</b>: 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. <br /> Tempered at 610-690°C, held for at least 30 min, cooled in still air or in furnace. <br /><br /> <b>Stress relieving</b>: Heated at 580-620°C, holding time for: <br /> <br /> t ≤ 15 mm ( ≥ 15 min.) <br /><br /> 15 < t ≤ 30 mm ( ≥ 30 min.) <br /><br /> 30 < t ≤ 350 mm ( ≥ 60 min.) <br /><br /> 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.<br>Tempered: 630 to 680°C, holding time at least 30 min, cooling, in still air or in a furnace.<br>Stress relieving</b>: Heated at 580-620°C, holding time for: <br /> <br /> t ≤ 15 mm ( ≥ 15 min.) <br /><br /> 15 < t ≤ 30 mm ( ≥ 30 min.) <br /><br /> 30 < t ≤ 350 mm ( ≥ 60 min.) <br /><br /> t > 350 mm (approx. 120 min)<br><br>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.