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Ensinger PEI

Meehanite GF-20 Flake Graphite Cast Iron
Categories: Metal; Ferrous Metal; Cast Iron; Gray Cast Iron

Material Notes: Type GF-20 is designed principally for high machinability and is used where ultimate strength is not an important factor.

General Meehanite information - Meehanite metal is first melted to a definite degree of undercooling or constitution which is related to the section of the casting to be poured and the range of physical properties such as tensile strength and hardness required. Nucleation with patented mixtures of graphitizing agents results in the removal of undercooling, in the controlled precipitation of graphite and in a fine grained eutectic cell structure which determines the density and physical integrity of the casting. Ordinary cast irons made to chemical specifications which do not include the benefit of controlled undercooling are influenced by mass effect to a maximum degree and for this and other reasons cannot be considered an equivalent to Meehanite metal.

Information provided by Meehanite Marketing Association.

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Physical PropertiesMetricEnglishComments
Specific Gravity 6.80 g/cc6.80 g/cc
 
Mechanical PropertiesMetricEnglishComments
Hardness, Brinell 150150Nominal
Tensile Strength, Ultimate 138 MPa20000 psi
Tensile Strength, Yield 65.5 MPa9500 psi.01% permanent set
Modulus of Elasticity 62.1 GPa9000 ksi
Compressive Strength 621 MPa90000 psi
Poissons Ratio 0.240.24
Fatigue Strength 75.8 MPa11000 psi
Machinability 30 %30 %Dalcher
Shear Modulus 27.6 GPa4000 ksi
Shear Strength 148.6 MPa21550 psi
Izod Impact Unnotched 5.42 - 12.2 J
@Diameter 20.3 mm
4.00 - 9.00 ft-lb
@Diameter 0.798 in
 
Thermal PropertiesMetricEnglishComments
Shrinkage 0.80 %0.80 %Patternmaker Shrinkage

Some of the values displayed above may have been converted from their original units and/or rounded in order to display the information in a consistent format. Users requiring more precise data for scientific or engineering calculations can click on the property value to see the original value as well as raw conversions to equivalent units. We advise that you only use the original value or one of its raw conversions in your calculations to minimize rounding error. We also ask that you refer to MatWeb's terms of use regarding this information. Click here to view all the property values for this datasheet as they were originally entered into MatWeb.

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NMEE05 / 18226

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