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ASTM A217 Cast Steel vs. Grade 38 Titanium

ASTM A217 cast steel belongs to the iron alloys classification, while grade 38 titanium belongs to the titanium alloys. There are 30 material properties with values for both materials. Properties with values for just one material (3, in this case) are not shown.

For each property being compared, the top bar is ASTM A217 cast steel and the bottom bar is grade 38 titanium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
110
Elongation at Break, % 21 to 27
11
Fatigue Strength, MPa 200 to 320
530
Poisson's Ratio 0.28 to 0.29
0.32
Reduction in Area, % 39 to 50
29
Shear Modulus, GPa 73 to 75
40
Tensile Strength: Ultimate (UTS), MPa 540 to 710
1000
Tensile Strength: Yield (Proof), MPa 270 to 460
910

Thermal Properties

Latent Heat of Fusion, J/g 250 to 270
410
Maximum Temperature: Mechanical, °C 410 to 600
330
Melting Completion (Liquidus), °C 1450 to 1460
1620
Melting Onset (Solidus), °C 1410 to 1420
1570
Specific Heat Capacity, J/kg-K 470
550
Thermal Conductivity, W/m-K 26 to 50
8.0
Thermal Expansion, µm/m-K 13
9.3

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.3 to 9.2
1.2
Electrical Conductivity: Equal Weight (Specific), % IACS 8.4 to 11
2.4

Otherwise Unclassified Properties

Base Metal Price, % relative 2.4 to 7.0
36
Density, g/cm3 7.8
4.5
Embodied Carbon, kg CO2/kg material 1.5 to 2.1
35
Embodied Energy, MJ/kg 20 to 28
560
Embodied Water, L/kg 47 to 87
160

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 110 to 130
110
Resilience: Unit (Modulus of Resilience), kJ/m3 190 to 570
3840
Stiffness to Weight: Axial, points 13 to 14
13
Stiffness to Weight: Bending, points 24 to 25
35
Strength to Weight: Axial, points 19 to 25
62
Strength to Weight: Bending, points 19 to 23
49
Thermal Diffusivity, mm2/s 6.9 to 14
3.2
Thermal Shock Resistance, points 16 to 20
72