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CC491K Bronze vs. Type 4 Niobium

CC491K bronze belongs to the copper alloys classification, while Type 4 niobium belongs to the otherwise unclassified metals. There are 21 material properties with values for both materials. Properties with values for just one material (8, in this case) are not shown.

For each property being compared, the top bar is CC491K bronze and the bottom bar is Type 4 niobium.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 73
120
Elastic (Young's, Tensile) Modulus, GPa 110
110
Elongation at Break, % 13
23
Poisson's Ratio 0.34
0.4
Shear Modulus, GPa 40
38
Tensile Strength: Ultimate (UTS), MPa 260
220
Tensile Strength: Yield (Proof), MPa 120
140

Thermal Properties

Latent Heat of Fusion, J/g 190
310
Specific Heat Capacity, J/kg-K 370
270
Thermal Conductivity, W/m-K 71
42
Thermal Expansion, µm/m-K 19
7.3

Otherwise Unclassified Properties

Density, g/cm3 8.9
8.6
Embodied Water, L/kg 350
160

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 27
44
Resilience: Unit (Modulus of Resilience), kJ/m3 67
93
Stiffness to Weight: Axial, points 6.7
6.8
Stiffness to Weight: Bending, points 18
18
Strength to Weight: Axial, points 8.1
7.2
Strength to Weight: Bending, points 10
9.5
Thermal Diffusivity, mm2/s 22
18
Thermal Shock Resistance, points 9.3
21

Alloy Composition

Aluminum (Al), % 0 to 0.010
0
Antimony (Sb), % 0 to 0.25
0
Carbon (C), % 0
0 to 0.010
Copper (Cu), % 81 to 87
0
Hafnium (Hf), % 0
0 to 0.020
Hydrogen (H), % 0
0 to 0.0015
Iron (Fe), % 0 to 0.3
0 to 0.010
Lead (Pb), % 4.0 to 6.0
0
Molybdenum (Mo), % 0
0 to 0.050
Nickel (Ni), % 0 to 2.0
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
Phosphorus (P), % 0 to 0.1
0
Silicon (Si), % 0 to 0.010
0 to 0.0050
Sulfur (S), % 0 to 0.1
0
Tantalum (Ta), % 0
0 to 0.5
Tin (Sn), % 4.0 to 6.0
0
Titanium (Ti), % 0
0 to 0.020
Tungsten (W), % 0
0 to 0.050
Zinc (Zn), % 4.0 to 6.0
0
Zirconium (Zr), % 0
0.8 to 1.2