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ASTM A216 Cast Steel vs. Grade 31 Titanium

ASTM A216 cast steel belongs to the iron alloys classification, while grade 31 titanium belongs to the titanium alloys. There are 29 material properties with values for both materials. Properties with values for just one material (2, in this case) are not shown.

For each property being compared, the top bar is ASTM A216 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, % 25 to 27
20
Fatigue Strength, MPa 170 to 230
300
Poisson's Ratio 0.29
0.32
Reduction in Area, % 39
34
Shear Modulus, GPa 72
41
Tensile Strength: Ultimate (UTS), MPa 500 to 570
510
Tensile Strength: Yield (Proof), MPa 230 to 310
450

Thermal Properties

Latent Heat of Fusion, J/g 250
420
Maximum Temperature: Mechanical, °C 400
320
Melting Completion (Liquidus), °C 1450 to 1460
1660
Melting Onset (Solidus), °C 1410
1610
Specific Heat Capacity, J/kg-K 470
540
Thermal Conductivity, W/m-K 49 to 52
21
Thermal Expansion, µm/m-K 12
8.7

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.1 to 7.2
3.4
Electrical Conductivity: Equal Weight (Specific), % IACS 8.2 to 8.3
6.9

Otherwise Unclassified Properties

Density, g/cm3 7.8
4.5
Embodied Carbon, kg CO2/kg material 1.4
36
Embodied Energy, MJ/kg 18
600
Embodied Water, L/kg 45
230

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 110 to 120
99
Resilience: Unit (Modulus of Resilience), kJ/m3 140 to 250
940
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
35
Strength to Weight: Axial, points 18 to 20
32
Strength to Weight: Bending, points 18 to 20
32
Thermal Diffusivity, mm2/s 13 to 14
8.5
Thermal Shock Resistance, points 16 to 18
39