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ASTM B780 Alloy vs. Type 4 Niobium

Both ASTM B780 alloy and Type 4 niobium are otherwise unclassified metals. There are 14 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 ASTM B780 alloy and the bottom bar is Type 4 niobium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 83
110
Elongation at Break, % 1.1 to 9.1
23
Poisson's Ratio 0.36
0.4
Shear Modulus, GPa 30
38
Tensile Strength: Ultimate (UTS), MPa 330 to 590
220

Thermal Properties

Latent Heat of Fusion, J/g 140
310
Specific Heat Capacity, J/kg-K 270
270
Thermal Expansion, µm/m-K 18
7.3

Otherwise Unclassified Properties

Density, g/cm3 10
8.6

Common Calculations

Stiffness to Weight: Axial, points 4.5
6.8
Stiffness to Weight: Bending, points 14
18
Strength to Weight: Axial, points 9.1 to 16
7.2
Strength to Weight: Bending, points 11 to 15
9.5
Thermal Shock Resistance, points 16 to 29
21

Alloy Composition

Cadmium (Cd), % 0 to 0.050
0
Carbon (C), % 0
0 to 0.010
Copper (Cu), % 23.5 to 25.7
0
Hafnium (Hf), % 0
0 to 0.020
Hydrogen (H), % 0
0 to 0.0015
Iron (Fe), % 0 to 0.050
0 to 0.010
Lead (Pb), % 0 to 0.030
0
Molybdenum (Mo), % 0
0 to 0.050
Nickel (Ni), % 0.35 to 0.65
0 to 0.0050
Niobium (Nb), % 0
98.1 to 99.2
Nitrogen (N), % 0
0 to 0.010
Oxygen (O), % 0
0 to 0.025
Silicon (Si), % 0
0 to 0.0050
Silver (Ag), % 74 to 76
0
Tantalum (Ta), % 0
0 to 0.5
Titanium (Ti), % 0
0 to 0.020
Tungsten (W), % 0
0 to 0.050
Zinc (Zn), % 0 to 0.060
0
Zirconium (Zr), % 0
0.8 to 1.2