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Automotive Grey Cast Iron vs. ASTM B541 Gold

Automotive grey cast iron belongs to the iron alloys classification, while ASTM B541 gold belongs to the otherwise unclassified metals. There are 21 material properties with values for both materials. Properties with values for just one material (9, in this case) are not shown. Please note that the two materials have significantly dissimilar densities. This means that additional care is required when interpreting the data, because some material properties are based on units of mass, while others are based on units of area or volume.

For each property being compared, the top bar is automotive grey cast iron and the bottom bar is ASTM B541 gold.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 180
110
Elongation at Break, % 9.6 to 14
6.0 to 14
Poisson's Ratio 0.29
0.4
Shear Modulus, GPa 69 to 70
38
Tensile Strength: Ultimate (UTS), MPa 140 to 290
670 to 1180
Tensile Strength: Yield (Proof), MPa 94 to 200
480 to 900

Thermal Properties

Latent Heat of Fusion, J/g 260 to 280
90
Melting Completion (Liquidus), °C 1380 to 1390
1110
Melting Onset (Solidus), °C 1340 to 1350
930
Specific Heat Capacity, J/kg-K 490
170
Thermal Expansion, µm/m-K 12 to 14
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.4 to 7.6
7.7 to 12
Electrical Conductivity: Equal Weight (Specific), % IACS 8.8 to 9.1
4.0 to 6.2

Otherwise Unclassified Properties

Density, g/cm3 7.5 to 7.6
17

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 18 to 25
65 to 91
Resilience: Unit (Modulus of Resilience), kJ/m3 25 to 110
1090 to 3830
Stiffness to Weight: Axial, points 13
3.4
Stiffness to Weight: Bending, points 25
9.0
Strength to Weight: Axial, points 5.2 to 11
11 to 19
Strength to Weight: Bending, points 8.0 to 13
9.8 to 14
Thermal Shock Resistance, points 4.2 to 8.6
36 to 63