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AWS ERTi-5 vs. Type 4 Niobium

AWS ERTi-5 belongs to the titanium alloys classification, while Type 4 niobium belongs to the otherwise unclassified metals. There are 20 material properties with values for both materials. Properties with values for just one material (10, in this case) are not shown.

For each property being compared, the top bar is AWS ERTi-5 and the bottom bar is Type 4 niobium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 110
110
Elongation at Break, % 10
23
Poisson's Ratio 0.32
0.4
Shear Modulus, GPa 40
38
Tensile Strength: Ultimate (UTS), MPa 900
220
Tensile Strength: Yield (Proof), MPa 830
140

Thermal Properties

Latent Heat of Fusion, J/g 410
310
Specific Heat Capacity, J/kg-K 560
270
Thermal Conductivity, W/m-K 7.1
42
Thermal Expansion, µm/m-K 9.6
7.3

Otherwise Unclassified Properties

Density, g/cm3 4.4
8.6
Embodied Water, L/kg 200
160

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 87
44
Resilience: Unit (Modulus of Resilience), kJ/m3 3250
93
Stiffness to Weight: Axial, points 13
6.8
Stiffness to Weight: Bending, points 35
18
Strength to Weight: Axial, points 56
7.2
Strength to Weight: Bending, points 46
9.5
Thermal Diffusivity, mm2/s 2.9
18
Thermal Shock Resistance, points 63
21

Alloy Composition

Aluminum (Al), % 5.5 to 6.8
0
Carbon (C), % 0 to 0.050
0 to 0.010
Hafnium (Hf), % 0
0 to 0.020
Hydrogen (H), % 0 to 0.015
0 to 0.0015
Iron (Fe), % 0 to 0.22
0 to 0.010
Molybdenum (Mo), % 0
0 to 0.050
Nickel (Ni), % 0
0 to 0.0050
Niobium (Nb), % 0
98.1 to 99.2
Nitrogen (N), % 0 to 0.030
0 to 0.010
Oxygen (O), % 0.12 to 0.2
0 to 0.025
Silicon (Si), % 0
0 to 0.0050
Tantalum (Ta), % 0
0 to 0.5
Titanium (Ti), % 88.2 to 90.9
0 to 0.020
Tungsten (W), % 0
0 to 0.050
Vanadium (V), % 3.5 to 4.5
0
Zirconium (Zr), % 0
0.8 to 1.2