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ASTM B522 Class II vs. Grade Ti-Pd18 Titanium

ASTM B522 class II belongs to the otherwise unclassified metals classification, while grade Ti-Pd18 titanium belongs to the titanium alloys. There are 21 material properties with values for both materials. Properties with values for just one material (11, 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 ASTM B522 class II and the bottom bar is grade Ti-Pd18 titanium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 96
110
Elongation at Break, % 1.1 to 28
17
Poisson's Ratio 0.41
0.32
Shear Modulus, GPa 34
40
Tensile Strength: Ultimate (UTS), MPa 280 to 490
710
Tensile Strength: Yield (Proof), MPa 120 to 210
540

Thermal Properties

Latent Heat of Fusion, J/g 77
410
Melting Completion (Liquidus), °C 1030
1640
Melting Onset (Solidus), °C 1030
1590
Specific Heat Capacity, J/kg-K 160
550
Thermal Expansion, µm/m-K 15
9.1

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 11
1.4
Electrical Conductivity: Equal Weight (Specific), % IACS 5.7
2.7

Otherwise Unclassified Properties

Density, g/cm3 17
4.5

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 4.4 to 63
110
Resilience: Unit (Modulus of Resilience), kJ/m3 75 to 230
1380
Stiffness to Weight: Axial, points 3.1
13
Stiffness to Weight: Bending, points 8.9
35
Strength to Weight: Axial, points 4.4 to 7.8
44
Strength to Weight: Bending, points 5.5 to 8.0
39
Thermal Shock Resistance, points 13 to 24
52

Alloy Composition

Aluminum (Al), % 0
2.5 to 3.5
Carbon (C), % 0
0 to 0.1
Gold (Au), % 68.5 to 69.5
0
Hydrogen (H), % 0
0 to 0.015
Iron (Fe), % 0
0 to 0.25
Nickel (Ni), % 0
0 to 0.050
Oxygen (O), % 0
0 to 0.15
Palladium (Pd), % 0
0.040 to 0.080
Platinum (Pt), % 5.5 to 6.5
0
Silver (Ag), % 24.5 to 25.5
0
Sulfur (S), % 0 to 0.010
0
Titanium (Ti), % 0
92.5 to 95.5
Vanadium (V), % 0
2.0 to 3.0
Residuals, % 0
0 to 0.4