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Grade 28 Titanium vs. Automotive Grey Cast Iron

Grade 28 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 28 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, % 11 to 17
9.6 to 14
Poisson's Ratio 0.32
0.29
Shear Modulus, GPa 40
69 to 70
Tensile Strength: Ultimate (UTS), MPa 690 to 980
140 to 290
Tensile Strength: Yield (Proof), MPa 540 to 810
94 to 200

Thermal Properties

Latent Heat of Fusion, J/g 410
260 to 280
Melting Completion (Liquidus), °C 1640
1380 to 1390
Melting Onset (Solidus), °C 1590
1340 to 1350
Specific Heat Capacity, J/kg-K 550
490
Thermal Conductivity, W/m-K 8.3
41 to 43
Thermal Expansion, µm/m-K 9.9
12 to 14

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.3
7.4 to 7.6
Electrical Conductivity: Equal Weight (Specific), % IACS 2.7
8.8 to 9.1

Otherwise Unclassified Properties

Base Metal Price, % relative 36
1.9 to 3.0
Density, g/cm3 4.5
7.5 to 7.6
Embodied Carbon, kg CO2/kg material 37
1.5 to 1.7
Embodied Energy, MJ/kg 600
21 to 24
Embodied Water, L/kg 370
44 to 51

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 87 to 110
18 to 25
Resilience: Unit (Modulus of Resilience), kJ/m3 1370 to 3100
25 to 110
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 35
25
Strength to Weight: Axial, points 43 to 61
5.2 to 11
Strength to Weight: Bending, points 39 to 49
8.0 to 13
Thermal Diffusivity, mm2/s 3.4
11 to 12
Thermal Shock Resistance, points 47 to 66
4.2 to 8.6