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Grade 15 Titanium vs. Automotive Grey Cast Iron

Grade 15 titanium belongs to the titanium alloys classification, while automotive grey cast iron belongs to the iron 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 grade 15 titanium and the bottom bar is automotive grey cast iron.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 110
180
Elongation at Break, % 20
9.6 to 14
Poisson's Ratio 0.32
0.29
Shear Modulus, GPa 41
69 to 70
Tensile Strength: Ultimate (UTS), MPa 540
140 to 290
Tensile Strength: Yield (Proof), MPa 430
94 to 200

Thermal Properties

Latent Heat of Fusion, J/g 420
260 to 280
Melting Completion (Liquidus), °C 1660
1380 to 1390
Melting Onset (Solidus), °C 1610
1340 to 1350
Specific Heat Capacity, J/kg-K 540
490
Thermal Conductivity, W/m-K 21
41 to 43
Thermal Expansion, µm/m-K 8.7
12 to 14

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 3.4
7.4 to 7.6
Electrical Conductivity: Equal Weight (Specific), % IACS 6.7
8.8 to 9.1

Otherwise Unclassified Properties

Base Metal Price, % relative 37
1.9 to 3.0
Density, g/cm3 4.5
7.5 to 7.6
Embodied Carbon, kg CO2/kg material 32
1.5 to 1.7
Embodied Energy, MJ/kg 520
21 to 24
Embodied Water, L/kg 210
44 to 51

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 100
18 to 25
Resilience: Unit (Modulus of Resilience), kJ/m3 870
25 to 110
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 35
25
Strength to Weight: Axial, points 33
5.2 to 11
Strength to Weight: Bending, points 33
8.0 to 13
Thermal Diffusivity, mm2/s 8.4
11 to 12
Thermal Shock Resistance, points 41
4.2 to 8.6