DIN 1693-1 Grade GGG-70 Cast Iron – High Strength, Wear-Resistant Material for Heavy‑Duty Applications
GGG-70, a predominantly perlitic cast iron material with nudolar graphite, for cast pieces with high strength and hardness, e.g. milling head body, pinion, cast pieces for high wear loading, e.g. scratch, snail wheel segments for construction machines, meal course segments as well as parts for eccentric presses, gear wheels, gear rims, pellet disks, cam discs, cam shafts. The material is comparable to UNS F 34800 of the USA.
Properties
General
| Property | Temperature | Value | Comment |
|---|---|---|---|
Density | 23.0 °C | 7.15 g/cm³ | Typical for Ductile (Nodular) Cast Iron |
Mechanical
| Property | Temperature | Value | Comment |
|---|---|---|---|
Compressive yield strength | 20.0 °C | 1000 MPa | |
Elastic modulus | 23.0 °C | 165 - 180 GPa | Typical for Ductile (Nodular) Cast Iron |
Elongation | 20.0 °C | 2 % | |
Hardness, Brinell | 20.0 °C | 235 - 285 [-] | |
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 | 700 MPa | |
Yield strength | 20.0 °C | 440 MPa |
Thermal
| Property | Temperature | Value | Comment |
|---|---|---|---|
Coefficient of thermal expansion | 100.0 °C | 1.24E-5 1/K | |
200.0 °C | 1.29E-5 1/K | ||
300.0 °C | 1.34E-5 1/K | ||
400.0 °C | 1.39E-5 1/K | ||
500.0 °C | 1.45E-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 | 32 W/(m·K) | |
200.0 °C | 32 W/(m·K) | ||
300.0 °C | 32 W/(m·K) | ||
400.0 °C | 32 W/(m·K) | ||
500.0 °C | 31 W/(m·K) | ||
Chemical properties
| Property | Value |
|---|---|
Carbon | 3.5 - 3.8 % |
Magnesium | 0.06 - 0.12 % |
Manganese | 0.4 % |
Phosphorus | 0.1 % |
Silicon | 2 - 3 % |
Sulfur | 0.01 % |
Metal
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