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Automotive Malleable Cast Iron vs. Grade 25 Titanium

Automotive malleable cast iron belongs to the iron alloys classification, while grade 25 titanium belongs to the titanium alloys. There are 26 material properties with values for both materials. Properties with values for just one material (6, in this case) are not shown.

For each property being compared, the top bar is automotive malleable cast iron and the bottom bar is grade 25 titanium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 180
110
Elongation at Break, % 1.0 to 10
11
Poisson's Ratio 0.29
0.32
Shear Modulus, GPa 70
40
Tensile Strength: Ultimate (UTS), MPa 350 to 720
1000
Tensile Strength: Yield (Proof), MPa 220 to 590
940

Thermal Properties

Latent Heat of Fusion, J/g 260
410
Melting Completion (Liquidus), °C 1410
1610
Melting Onset (Solidus), °C 1370
1560
Specific Heat Capacity, J/kg-K 480
560
Thermal Conductivity, W/m-K 41
7.1
Thermal Expansion, µm/m-K 14
9.6

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.4
1.0
Electrical Conductivity: Equal Weight (Specific), % IACS 8.7
2.0

Otherwise Unclassified Properties

Density, g/cm3 7.6
4.5
Embodied Carbon, kg CO2/kg material 1.5
43
Embodied Energy, MJ/kg 20
700
Embodied Water, L/kg 45
320

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 6.8 to 30
110
Resilience: Unit (Modulus of Resilience), kJ/m3 130 to 950
4220
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 25
35
Strength to Weight: Axial, points 13 to 26
62
Strength to Weight: Bending, points 14 to 24
50
Thermal Diffusivity, mm2/s 11
2.8
Thermal Shock Resistance, points 9.9 to 21
71

Alloy Composition

Aluminum (Al), % 0
5.5 to 6.8
Carbon (C), % 2.2 to 2.9
0 to 0.080
Hydrogen (H), % 0
0 to 0.013
Iron (Fe), % 93.6 to 96.7
0 to 0.4
Manganese (Mn), % 0.15 to 1.3
0
Nickel (Ni), % 0
0.3 to 0.8
Nitrogen (N), % 0
0 to 0.050
Oxygen (O), % 0
0 to 0.2
Palladium (Pd), % 0
0.040 to 0.080
Phosphorus (P), % 0.020 to 0.15
0
Silicon (Si), % 0.9 to 1.9
0
Sulfur (S), % 0.020 to 0.2
0
Titanium (Ti), % 0
86.7 to 90.6
Vanadium (V), % 0
3.5 to 4.5
Residuals, % 0
0 to 0.4