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Grade Ti-Pd18 Titanium vs. SAE-AISI M7 Steel

Grade Ti-Pd18 titanium belongs to the titanium alloys classification, while SAE-AISI M7 steel belongs to the iron alloys. There are 20 material properties with values for both materials. Properties with values for just one material (12, in this case) are not shown.

For each property being compared, the top bar is grade Ti-Pd18 titanium and the bottom bar is SAE-AISI M7 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 110
200
Poisson's Ratio 0.32
0.29
Shear Modulus, GPa 40
77
Tensile Strength: Ultimate (UTS), MPa 710
760 to 2210

Thermal Properties

Latent Heat of Fusion, J/g 410
270
Melting Completion (Liquidus), °C 1640
1560
Melting Onset (Solidus), °C 1590
1510
Specific Heat Capacity, J/kg-K 550
450
Thermal Conductivity, W/m-K 8.2
28
Thermal Expansion, µm/m-K 9.1
12

Otherwise Unclassified Properties

Density, g/cm3 4.5
8.1
Embodied Carbon, kg CO2/kg material 41
8.9
Embodied Energy, MJ/kg 670
130
Embodied Water, L/kg 270
100

Common Calculations

Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 35
24
Strength to Weight: Axial, points 44
26 to 76
Strength to Weight: Bending, points 39
23 to 47
Thermal Diffusivity, mm2/s 3.3
7.8
Thermal Shock Resistance, points 52
24 to 69

Alloy Composition

Aluminum (Al), % 2.5 to 3.5
0
Carbon (C), % 0 to 0.1
1.0 to 1.1
Chromium (Cr), % 0
3.5 to 4.0
Copper (Cu), % 0
0 to 0.25
Hydrogen (H), % 0 to 0.015
0
Iron (Fe), % 0 to 0.25
79.8 to 83.8
Manganese (Mn), % 0
0.15 to 0.4
Molybdenum (Mo), % 0
8.2 to 9.2
Nickel (Ni), % 0 to 0.050
0 to 0.3
Oxygen (O), % 0 to 0.15
0
Palladium (Pd), % 0.040 to 0.080
0
Phosphorus (P), % 0
0 to 0.030
Silicon (Si), % 0
0.2 to 0.55
Sulfur (S), % 0
0 to 0.030
Titanium (Ti), % 92.5 to 95.5
0
Tungsten (W), % 0
1.4 to 2.1
Vanadium (V), % 2.0 to 3.0
1.8 to 2.3
Residuals, % 0 to 0.4
0