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ASTM B628 Ag-Cu vs. Type 2 Niobium

Both ASTM B628 Ag-Cu and Type 2 niobium are otherwise unclassified metals. There are 14 material properties with values for both materials. Properties with values for just one material (12, in this case) are not shown.

For each property being compared, the top bar is ASTM B628 Ag-Cu and the bottom bar is Type 2 niobium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 83
110
Elongation at Break, % 1.1 to 17
29
Poisson's Ratio 0.36
0.4
Shear Modulus, GPa 31
38
Tensile Strength: Ultimate (UTS), MPa 350 to 760
140

Thermal Properties

Latent Heat of Fusion, J/g 140
320
Specific Heat Capacity, J/kg-K 280
270
Thermal Expansion, µm/m-K 19
7.3

Otherwise Unclassified Properties

Density, g/cm3 10
8.6

Common Calculations

Stiffness to Weight: Axial, points 4.6
6.8
Stiffness to Weight: Bending, points 14
18
Strength to Weight: Axial, points 9.5 to 21
4.6
Strength to Weight: Bending, points 11 to 18
7.1
Thermal Shock Resistance, points 16 to 34
13

Alloy Composition


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Aluminum (Al), % 0 to 0.0050
0
Cadmium (Cd), % 0 to 0.050
0
Carbon (C), % 0
0 to 0.010
Copper (Cu), % 26.6 to 29
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 0.020
Nickel (Ni), % 0 to 0.010
0 to 0.0050
Niobium (Nb), % 0
99.5 to 100
Nitrogen (N), % 0
0 to 0.010
Oxygen (O), % 0
0 to 0.025
Phosphorus (P), % 0 to 0.030
0
Silicon (Si), % 0
0 to 0.0050
Silver (Ag), % 71 to 73
0
Tantalum (Ta), % 0
0 to 0.3
Titanium (Ti), % 0
0 to 0.030
Tungsten (W), % 0
0 to 0.050
Zinc (Zn), % 0 to 0.060
0
Zirconium (Zr), % 0
0 to 0.020
Residuals, % 0 to 0.21
0