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Ductile Cast Iron vs. Grade 16 Titanium

Ductile cast iron belongs to the iron alloys classification, while grade 16 titanium belongs to the titanium alloys. There are 28 material properties with values for both materials. Properties with values for just one material (5, in this case) are not shown.

For each property being compared, the top bar is ductile cast iron and the bottom bar is grade 16 titanium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 170 to 180
110
Elongation at Break, % 2.1 to 20
23
Poisson's Ratio 0.28 to 0.31
0.32
Shear Modulus, GPa 64 to 70
38
Shear Strength, MPa 420 to 800
250
Tensile Strength: Ultimate (UTS), MPa 460 to 920
400
Tensile Strength: Yield (Proof), MPa 310 to 670
340

Thermal Properties

Latent Heat of Fusion, J/g 270
420
Maximum Temperature: Mechanical, °C 290
320
Melting Completion (Liquidus), °C 1160
1660
Melting Onset (Solidus), °C 1120
1610
Specific Heat Capacity, J/kg-K 490
540
Thermal Conductivity, W/m-K 31 to 36
22
Thermal Expansion, µm/m-K 11
9.2

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.4
3.6
Electrical Conductivity: Equal Weight (Specific), % IACS 8.8 to 9.4
7.2

Otherwise Unclassified Properties

Density, g/cm3 7.1 to 7.5
4.5
Embodied Carbon, kg CO2/kg material 1.5
36
Embodied Energy, MJ/kg 21
600
Embodied Water, L/kg 43
230

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 17 to 80
86
Resilience: Unit (Modulus of Resilience), kJ/m3 280 to 1330
550
Stiffness to Weight: Axial, points 12 to 14
13
Stiffness to Weight: Bending, points 24 to 26
35
Strength to Weight: Axial, points 17 to 35
25
Strength to Weight: Bending, points 18 to 29
27
Thermal Diffusivity, mm2/s 8.9 to 10
8.9
Thermal Shock Resistance, points 17 to 35
29

Alloy Composition

Carbon (C), % 3.0 to 3.5
0 to 0.080
Hydrogen (H), % 0
0 to 0.015
Iron (Fe), % 93.7 to 95.5
0 to 0.3
Nitrogen (N), % 0
0 to 0.030
Oxygen (O), % 0
0 to 0.25
Palladium (Pd), % 0
0.040 to 0.080
Phosphorus (P), % 0 to 0.080
0
Silicon (Si), % 1.5 to 2.8
0
Titanium (Ti), % 0
98.8 to 99.96
Residuals, % 0
0 to 0.4