GB QTANi20Cr2Nb Cast irons

Material group: Ferrous Alloys / Cast irons

Country / Standard: China / GB

Data updates

Latest Update: 2026-05

Total number of updates: 3

Update History

2015-09 2014-08

This material has 4466 properties — only a subset is shown here.

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GB QTANi20Cr2Nb Chemical Composition

CRITERIA

VALUE

UNIT

CAS NUMBER

CRITERIA

VALUE

≤ 3.0

UNIT

CAS NUMBER

7440-44-0

CRITERIA

VALUE

1.0 – 3.5

UNIT

CAS NUMBER

7440-47-3

CRITERIA

VALUE

≤ 0.5

UNIT

CAS NUMBER

7440-50-8

CRITERIA

VALUE

val1

UNIT

CAS NUMBER

7439-96-5

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

GB/T 26648: 2026 / Austenitic iron castings

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GB QTANi20Cr2Nb Physical Properties

Temperature

0 - 30°C 100 - 300°C

PROPERTY / VALUE

Modulus of Elasticity

112 — 130 GPa

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Electrical Resistivity

1 Ω∙mm²/m

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Density

val1 kg/dm³

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Heat Capacity

val1 J/(kg∙°C)

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Service Temperature

val1 °C

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Thermal Conductivity

12.6 W/(m∙°C)

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Electrical Conductivity

val1 S/m

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Coefficient of Thermal Expansion (CTE)

val1 10^-6/°C

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This material has 4466 properties — only a subset is shown here.

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GB QTANi20Cr2Nb Heat Treatments

Stress-relief heat-treatment procedure

The stress-relief heat-treatment procedure is as follows:
a) heating rate not greater than 150°C/h; heat to 625-650°C and hold for 2 h;
b) for each additional 25 mm of section thickness, increase the holding time by 1 h;
c) cooling rate not greater than 100°C/h; furnace-cool to 200°C, then remove from the furnace and air-cool.

High-temperature stabilization heat-treatment procedure

For workpieces intended for service at temperatures above 500°C, high-temperature stabilization heat treatment shall be carried out. The recommended high-temperature stabilization heat-treatment procedure for castings is as follows:
a) heating rate not greater than 150°C/h; heat to 955-1040°C and hold for 3-5 h;
b) for each additional 25 mm of section thickness, increase the holding time by 1 h;
c) after the specified holding time has been reached, remove from the furnace and air-cool.

GB QTANi20Cr2Nb Mechanical Properties

Temperature

0 - 30°C ≥ 300°C

PROPERTY / VALUE

Tensile Strength

≥ 370 MPa

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Brinell Hardness (HB)

140 — 200

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Elongation, A

val1 %

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Yield Strength, Rp0.2

val1 MPa

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Impact Energy

val1 J

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65Cross References

18Composition
21Mechanical Properties
10Physical Properties
1Heat Treatment
-Metallography
-Machinability

2Stress-Strain
-Formability
-Fatigue
-Fracture
1Creep

-Joints
-Coatings
-Dimensions
-Tribology

4348Corrosion
-Ageing
-Weatherability
-Irradiation

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