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Grade Ti-Pd18 Titanium vs. SAE-AISI H25 Steel

Grade Ti-Pd18 titanium belongs to the titanium alloys classification, while SAE-AISI H25 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. Please note that the two materials have significantly dissimilar densities. This means that additional care is required when interpreting the data, because some material properties are based on units of mass, while others are based on units of area or volume.

For each property being compared, the top bar is grade Ti-Pd18 titanium and the bottom bar is SAE-AISI H25 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
79
Tensile Strength: Ultimate (UTS), MPa 710
710 to 1620

Thermal Properties

Latent Heat of Fusion, J/g 410
250
Melting Completion (Liquidus), °C 1640
1750
Melting Onset (Solidus), °C 1590
1700
Specific Heat Capacity, J/kg-K 550
420
Thermal Conductivity, W/m-K 8.2
26
Thermal Expansion, µm/m-K 9.1
12

Otherwise Unclassified Properties

Density, g/cm3 4.5
9.1
Embodied Carbon, kg CO2/kg material 41
6.2
Embodied Energy, MJ/kg 670
93
Embodied Water, L/kg 270
83

Common Calculations

Stiffness to Weight: Axial, points 13
12
Stiffness to Weight: Bending, points 35
22
Strength to Weight: Axial, points 44
22 to 50
Strength to Weight: Bending, points 39
20 to 34
Thermal Diffusivity, mm2/s 3.3
6.7
Thermal Shock Resistance, points 52
22 to 49

Alloy Composition

Aluminum (Al), % 2.5 to 3.5
0
Carbon (C), % 0 to 0.1
0.22 to 0.32
Chromium (Cr), % 0
3.8 to 4.5
Copper (Cu), % 0
0 to 0.25
Hydrogen (H), % 0 to 0.015
0
Iron (Fe), % 0 to 0.25
77.2 to 81.3
Manganese (Mn), % 0
0.15 to 0.4
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
0.15 to 0.4
Sulfur (S), % 0
0 to 0.030
Titanium (Ti), % 92.5 to 95.5
0
Tungsten (W), % 0
14 to 16
Vanadium (V), % 2.0 to 3.0
0.4 to 0.6
Residuals, % 0 to 0.4
0