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Automotive Grey Cast Iron vs. Grade 7 Titanium

Automotive grey cast iron belongs to the iron alloys classification, while grade 7 titanium belongs to the titanium alloys. There are 27 material properties with values for both materials. Properties with values for just one material (5, in this case) are not shown.

For each property being compared, the top bar is automotive grey cast iron and the bottom bar is grade 7 titanium.

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
24
Poisson's Ratio 0.29
0.32
Shear Modulus, GPa 69 to 70
38
Tensile Strength: Ultimate (UTS), MPa 140 to 290
420
Tensile Strength: Yield (Proof), MPa 94 to 200
340

Thermal Properties

Latent Heat of Fusion, J/g 260 to 280
420
Melting Completion (Liquidus), °C 1380 to 1390
1660
Melting Onset (Solidus), °C 1340 to 1350
1610
Specific Heat Capacity, J/kg-K 490
540
Thermal Conductivity, W/m-K 41 to 43
22
Thermal Expansion, µm/m-K 12 to 14
9.2

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.4 to 7.6
3.6
Electrical Conductivity: Equal Weight (Specific), % IACS 8.8 to 9.1
7.2

Otherwise Unclassified Properties

Density, g/cm3 7.5 to 7.6
4.5
Embodied Carbon, kg CO2/kg material 1.5 to 1.7
47
Embodied Energy, MJ/kg 21 to 24
800
Embodied Water, L/kg 44 to 51
470

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 18 to 25
95
Resilience: Unit (Modulus of Resilience), kJ/m3 25 to 110
560
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 25
35
Strength to Weight: Axial, points 5.2 to 11
26
Strength to Weight: Bending, points 8.0 to 13
28
Thermal Diffusivity, mm2/s 11 to 12
8.9
Thermal Shock Resistance, points 4.2 to 8.6
31