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EN GJS-1200-2 Austempered Cast Iron – High Strength & Ductility

Sort EN-GJS-1200-2, mat. No EN-JS1120 is a ferrous-carbon-based cast material that contains carbon predominantly in the form of spheroidal particles and that combines compared to the sort cast iron with nodular graphite (DIN EN 1563) higher strength and ductility properties by heat-treatment. Heat-treatment (austenite is usually transformed at a temperature between 250 and 400 °C in order to form a predominantly bainitc-ferritic structure) is an integral component of the production process.

Properties

General

PropertyTemperatureValue

Density

20.0 °C

7.15 g/cm³

Mechanical

PropertyTemperatureValueComment

Elastic modulus

20.0 °C

170 GPa

Elongation

20.0 °C

2 %

Hardness, Brinell

20.0 °C

340 - 440 [-]

Poisson's ratio

23.0 °C

0.26 - 0.31 [-]

Typical for Ductile (Nodular) Cast Iron

Shear modulus

23.0 °C

63 - 66 GPa

Typical for Ductile (Nodular) Cast Iron

Tensile strength

20.0 °C

1200 MPa

Yield strength Rp0.2

20.0 °C

850 MPa

Thermal

PropertyTemperatureValueComment

Coefficient of thermal expansion

400.0 °C

1.65E-5 1/K

Melting point

1150 - 1200 °C

Typical for Ductile (Nodular) Cast Iron

Specific heat capacity

20.0 °C

420 J/(kg·K)

400.0 °C

507 J/(kg·K)

Thermal conductivity

20.0 °C

33 W/(m·K)

300.0 °C

33 W/(m·K)

Electrical

PropertyTemperatureValue

Electrical resistivity

20.0 °C

5.4E-7 Ω·m

Chemical properties

PropertyValue

Carbon

3.5 %

Manganese

0.3 %

Silicon

2.4 %


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