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Austenitic Grey Cast Iron vs. Grade 27 Titanium

Austenitic grey cast iron belongs to the iron alloys classification, while grade 27 titanium belongs to the titanium alloys. There are 19 material properties with values for both materials. Properties with values for just one material (14, in this case) are not shown.

For each property being compared, the top bar is austenitic grey cast iron and the bottom bar is grade 27 titanium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 180
110
Poisson's Ratio 0.29 to 0.3
0.32
Shear Modulus, GPa 69 to 72
41
Tensile Strength: Ultimate (UTS), MPa 150 to 230
270

Thermal Properties

Latent Heat of Fusion, J/g 280 to 350
420
Melting Completion (Liquidus), °C 1340 to 1400
1660
Melting Onset (Solidus), °C 1290 to 1350
1610
Specific Heat Capacity, J/kg-K 470 to 490
540
Thermal Expansion, µm/m-K 13 to 14
8.7

Otherwise Unclassified Properties

Base Metal Price, % relative 14 to 24
37
Density, g/cm3 7.7 to 8.1
4.5
Embodied Carbon, kg CO2/kg material 3.1 to 4.7
33
Embodied Energy, MJ/kg 43 to 65
530
Embodied Water, L/kg 93 to 120
320

Common Calculations

Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 23 to 25
35
Strength to Weight: Axial, points 5.3 to 8.2
17
Strength to Weight: Bending, points 7.9 to 11
21
Thermal Shock Resistance, points 4.5 to 6.5
21