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ASTM A732 Cast Steel vs. Grade 31 Titanium

ASTM A732 cast steel belongs to the iron alloys classification, while grade 31 titanium belongs to the titanium alloys. There are 28 material properties with values for both materials. Properties with values for just one material (4, in this case) are not shown.

For each property being compared, the top bar is ASTM A732 cast steel and the bottom bar is grade 31 titanium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
110
Elongation at Break, % 4.0 to 25
20
Fatigue Strength, MPa 230 to 750
300
Poisson's Ratio 0.29
0.32
Shear Modulus, GPa 72 to 73
41
Tensile Strength: Ultimate (UTS), MPa 460 to 1470
510
Tensile Strength: Yield (Proof), MPa 310 to 1340
450

Thermal Properties

Latent Heat of Fusion, J/g 250 to 260
420
Maximum Temperature: Mechanical, °C 400 to 430
320
Melting Completion (Liquidus), °C 1440 to 1460
1660
Melting Onset (Solidus), °C 1400 to 1420
1610
Specific Heat Capacity, J/kg-K 470 to 480
540
Thermal Conductivity, W/m-K 39 to 50
21
Thermal Expansion, µm/m-K 13
8.7

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.1 to 7.7
3.4
Electrical Conductivity: Equal Weight (Specific), % IACS 8.2 to 8.9
6.9

Otherwise Unclassified Properties

Density, g/cm3 7.8 to 7.9
4.5
Embodied Carbon, kg CO2/kg material 1.4 to 1.7
36
Embodied Energy, MJ/kg 19 to 24
600
Embodied Water, L/kg 47 to 54
230

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 45 to 130
99
Resilience: Unit (Modulus of Resilience), kJ/m3 260 to 4770
940
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
35
Strength to Weight: Axial, points 16 to 52
32
Strength to Weight: Bending, points 17 to 37
32
Thermal Diffusivity, mm2/s 10 to 14
8.5
Thermal Shock Resistance, points 14 to 43
39