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DIN 1693‑1 GGG‑40 Cast Iron: High‑Performance, High‑Strain Material for Automotive, Marine, and Industrial Applications

GGG-40, a ferritic cast iron material with nodular cast iron for cast pieces for high performance with the mechanical treatment as well as for cast pieces with high strain at rupture and impact energy for static and dynamic loadings in the construction of vehicles, building of ships, in civil engineering, plastics processing, for pumps and compressors as well as for armatures, in the machine tool manufacture, mechanical engineering, energy mechanical engineering, in the casting industry. For engine bearings, articulated bearing, disk wheels, axles, transmission case, engine racks, front plates, lockcylinder, framework, pump housing, cylinder, impellers, chuck, stand for machine tools, transport and storage vessel, molding boxes, molds, rims, hydraulic housing etc.. The material is comparable to UNS F 32800 of the USA.

Properties

General

PropertyTemperatureValueComment

Density

23.0 °C

7.15 g/cm³

Typical for Ductile (Nodular) Cast Iron

Mechanical

PropertyTemperatureValueComment

Compressive yield strength

20.0 °C

700 MPa

Elastic modulus

23.0 °C

165 - 180 GPa

Typical for Ductile (Nodular) Cast Iron

Elongation

20.0 °C

15 %

Hardness, Brinell

20.0 °C

135 - 185 [-]

Poisson's ratio

20.0 °C

0.27 - 0.29 [-]

Shear modulus

23.0 °C

63 - 66 GPa

Typical for Ductile (Nodular) Cast Iron

Tensile strength

20.0 °C

400 MPa

Yield strength

20.0 °C

250 MPa

Thermal

PropertyTemperatureValueComment

Coefficient of thermal expansion

100.0 °C

1.28E-5 1/K

200.0 °C

1.33E-5 1/K

300.0 °C

1.38E-5 1/K

400.0 °C

1.43E-5 1/K

500.0 °C

1.48E-5 1/K

Melting point

1150 - 1200 °C

Typical for Ductile (Nodular) Cast Iron

Specific heat capacity

23.0 °C

460 - 502 J/(kg·K)

Typical for Ductile (Nodular) Cast Iron

Thermal conductivity

100.0 °C

38 W/(m·K)

200.0 °C

39 W/(m·K)

300.0 °C

37 W/(m·K)

400.0 °C

36 W/(m·K)

500.0 °C

34 W/(m·K)

Chemical properties

PropertyValue

Carbon

3.5 - 3.8 %

Magnesium

0.06 - 0.12 %

Manganese

0.4 %

Phosphorus

0.1 %

Silicon

2 - 3 %

Sulfur

0.01 %


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