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Grade 27 Titanium vs. AWS BAu-2

Grade 27 titanium belongs to the titanium alloys classification, while AWS BAu-2 belongs to the otherwise unclassified metals. There are 15 material properties with values for both materials. Properties with values for just one material (17, 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 27 titanium and the bottom bar is AWS BAu-2.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 110
100
Poisson's Ratio 0.32
0.4
Shear Modulus, GPa 41
36
Tensile Strength: Ultimate (UTS), MPa 270
150

Thermal Properties

Latent Heat of Fusion, J/g 420
92
Melting Completion (Liquidus), °C 1660
890
Melting Onset (Solidus), °C 1610
890
Specific Heat Capacity, J/kg-K 540
180
Thermal Expansion, µm/m-K 8.7
15

Otherwise Unclassified Properties

Density, g/cm3 4.5
17

Common Calculations

Stiffness to Weight: Axial, points 13
3.3
Stiffness to Weight: Bending, points 35
9.1
Strength to Weight: Axial, points 17
2.4
Strength to Weight: Bending, points 21
3.6
Thermal Shock Resistance, points 21
7.1

Alloy Composition

Carbon (C), % 0 to 0.080
0
Copper (Cu), % 0
19.4 to 20.5
Gold (Au), % 0
79.5 to 80.5
Hydrogen (H), % 0 to 0.015
0
Iron (Fe), % 0 to 0.2
0
Nitrogen (N), % 0 to 0.030
0
Oxygen (O), % 0 to 0.18
0
Ruthenium (Ru), % 0.080 to 0.14
0
Titanium (Ti), % 99 to 99.92
0
Residuals, % 0
0 to 0.15