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Grade 37 Titanium vs. Ductile Cast Iron

Grade 37 titanium belongs to the titanium alloys classification, while ductile cast iron belongs to the iron alloys. There are 29 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 grade 37 titanium and the bottom bar is ductile cast iron.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 110
170 to 180
Elongation at Break, % 22
2.1 to 20
Poisson's Ratio 0.32
0.28 to 0.31
Shear Modulus, GPa 40
64 to 70
Shear Strength, MPa 240
420 to 800
Tensile Strength: Ultimate (UTS), MPa 390
460 to 920
Tensile Strength: Yield (Proof), MPa 250
310 to 670

Thermal Properties

Latent Heat of Fusion, J/g 420
270
Maximum Temperature: Mechanical, °C 310
290
Melting Completion (Liquidus), °C 1650
1160
Melting Onset (Solidus), °C 1600
1120
Specific Heat Capacity, J/kg-K 550
490
Thermal Conductivity, W/m-K 21
31 to 36
Thermal Expansion, µm/m-K 8.9
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 3.4
7.4
Electrical Conductivity: Equal Weight (Specific), % IACS 6.8
8.8 to 9.4

Otherwise Unclassified Properties

Base Metal Price, % relative 36
1.9
Density, g/cm3 4.5
7.1 to 7.5
Embodied Carbon, kg CO2/kg material 31
1.5
Embodied Energy, MJ/kg 500
21
Embodied Water, L/kg 120
43

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 76
17 to 80
Resilience: Unit (Modulus of Resilience), kJ/m3 280
280 to 1330
Stiffness to Weight: Axial, points 13
12 to 14
Stiffness to Weight: Bending, points 35
24 to 26
Strength to Weight: Axial, points 24
17 to 35
Strength to Weight: Bending, points 26
18 to 29
Thermal Diffusivity, mm2/s 8.4
8.9 to 10
Thermal Shock Resistance, points 29
17 to 35

Alloy Composition

Aluminum (Al), % 1.0 to 2.0
0
Carbon (C), % 0 to 0.080
3.0 to 3.5
Hydrogen (H), % 0 to 0.015
0
Iron (Fe), % 0 to 0.3
93.7 to 95.5
Nitrogen (N), % 0 to 0.030
0
Oxygen (O), % 0 to 0.25
0
Phosphorus (P), % 0
0 to 0.080
Silicon (Si), % 0
1.5 to 2.8
Titanium (Ti), % 96.9 to 99
0
Residuals, % 0 to 0.4
0