Comparison of Physical Properties of Gray and Ductile Iron Castings at Room Temperature

Fonderie Saguenay are a jobbing shop specializing in producing components in materials such as gray iron and ductile iron.

Comparison of Physical Properties if Cast Iron with Steel Castings

The following table has been compiled to assist with the selection of the ideal grade of cast iron for your castings. Data for cast steels is also provided for comparison purposes.

Property
Gray Iron
Ductile Iron
Low Carbon Steel Casting
Low Alloy Steel casting
Density (lbs/in3)
0.26
0.26
0.28
0.28
Poisson's ratio[ט]
0.28
0.28
0.3
0.3
Modulus of elasticity (Tension) (Psi) [E]
13000000
26000000
30000000
30000000
Modulus of rigidity (Shearing) (Psi) [G]
5800000
9800000
11500000
11500000
Thermal conductivity (BTU/Hr/ft2/inch/°F) [k] (Cu=2700
325
250
350
225
Thermal expansion coefficient(/°F) [a]
5.8 x 10-6
6.5 x 10-6
6.5 x 10-6
6.7 x 10-6
Damping capacity
40 to 125
3 to 10
1 to 2
1 to 2
Electrical resistivity(µ Ohm . Cm) [ρ] (Cu =1.67)
80 to 100
40 to 60
12
15
Magnetic properties (KiloGauss/[email protected] Oersteds
10
14
16
16
Pattern-making shrinkage (%)
0.83
1.04
1.56
2.08

This information has been sourced, reviewed and adapted from materials provided by Fonderie Saguenay.

For more information on this source, please visit Fonderie Saguenay.

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