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Automotive Grey Cast Iron vs. C68400 Brass

Automotive grey cast iron belongs to the iron alloys classification, while C68400 brass belongs to the copper alloys. There are 28 material properties with values for both materials. Properties with values for just one material (2, in this case) are not shown.

For each property being compared, the top bar is automotive grey cast iron and the bottom bar is C68400 brass.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 160 to 280
150
Elastic (Young's, Tensile) Modulus, GPa 180
110
Elongation at Break, % 9.6 to 14
18
Poisson's Ratio 0.29
0.31
Shear Modulus, GPa 69 to 70
41
Tensile Strength: Ultimate (UTS), MPa 140 to 290
540
Tensile Strength: Yield (Proof), MPa 94 to 200
310

Thermal Properties

Latent Heat of Fusion, J/g 260 to 280
210
Melting Completion (Liquidus), °C 1380 to 1390
840
Melting Onset (Solidus), °C 1340 to 1350
820
Specific Heat Capacity, J/kg-K 490
400
Thermal Conductivity, W/m-K 41 to 43
66
Thermal Expansion, µm/m-K 12 to 14
20

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.4 to 7.6
87
Electrical Conductivity: Equal Weight (Specific), % IACS 8.8 to 9.1
99

Otherwise Unclassified Properties

Base Metal Price, % relative 1.9 to 3.0
23
Density, g/cm3 7.5 to 7.6
7.9
Embodied Carbon, kg CO2/kg material 1.5 to 1.7
2.7
Embodied Energy, MJ/kg 21 to 24
47
Embodied Water, L/kg 44 to 51
320

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 18 to 25
81
Resilience: Unit (Modulus of Resilience), kJ/m3 25 to 110
460
Stiffness to Weight: Axial, points 13
7.5
Stiffness to Weight: Bending, points 25
20
Strength to Weight: Axial, points 5.2 to 11
19
Strength to Weight: Bending, points 8.0 to 13
19
Thermal Diffusivity, mm2/s 11 to 12
21
Thermal Shock Resistance, points 4.2 to 8.6
18