ISO X 21 CrMoNiV 12 2 Stainless steels

Material group: Ferrous Alloys / Stainless steels

Country / Standard: International / ISO

Data updates

Latest Update: 2019-05

Total number of updates: 1

Update History

This material has 60 properties — only a subset is shown here.

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ISO X 21 CrMoNiV 12 2 Chemical Composition

CRITERIA

VALUE

UNIT

CAS NUMBER

CRITERIA

VALUE

0.17 – 0.25

UNIT

CAS NUMBER

7440-44-0

CRITERIA

VALUE

11.00 – 12.50

UNIT

CAS NUMBER

7440-47-3

CRITERIA

VALUE

≤ 1.00

UNIT

CAS NUMBER

7439-96-5

CRITERIA

VALUE

val1

UNIT

CAS NUMBER

7439-98-7

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

ISO/TR 4956: 1984 / Wrought steels for use at elevated temperatures in engines

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ISO X 21 CrMoNiV 12 2 Physical Properties

Temperature

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

PROPERTY / VALUE

Modulus of Elasticity

190 — 216 GPa

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Thermal Conductivity

val1 W/(m∙°C)

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Electrical Resistivity

val1 Ω∙mm²/m

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Density

val1 kg/dm³

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Electrical Conductivity

val1 S/m

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Heat Capacity

val1 J/(kg∙°C)

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Poisson Coefficient

val1

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This material has 60 properties — only a subset is shown here.

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ISO X 21 CrMoNiV 12 2 Heat Treatments

Quenching and tempering (QT1): 1020-1070°C, air cooling, water or oil quenching; Tempering: 680-740°C (min. of 2 hours).
Quenching and tempering (QT2): 1020-1070°C, air cooling, water or oil quenching; Tempering: 640-700°C (min. of 2 hours).
If a stress relief treatment is necessary, the stress relief temperature should be at least 30°C lower than the tempering temperature.
The indications of heat treatment for guidance only, except in cases where test samples are to be reference heat treated.

ISO X 21 CrMoNiV 12 2 Mechanical Properties

Temperature

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

PROPERTY / VALUE

Tensile Strength

780 — 1050 MPa

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Brinell Hardness (HB)

235 — 310

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Elongation, A

≥ 11 %

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Yield Strength, Rp0.2

val1 MPa

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Impact Energy

val1 J

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1Cross References

9Composition
28Mechanical Properties
18Physical Properties
1Heat Treatment
-Metallography
-Machinability

2Stress-Strain
-Formability
-Fatigue
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1Creep

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