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Type 4 Niobium vs. C68700 Brass

Type 4 niobium belongs to the otherwise unclassified metals classification, while C68700 brass belongs to the copper alloys. There are 18 material properties with values for both materials. Properties with values for just one material (11, in this case) are not shown.

For each property being compared, the top bar is Type 4 niobium and the bottom bar is C68700 brass.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 110
110
Poisson's Ratio 0.4
0.32
Shear Modulus, GPa 38
41
Tensile Strength: Ultimate (UTS), MPa 220
390
Tensile Strength: Yield (Proof), MPa 140
140

Thermal Properties

Latent Heat of Fusion, J/g 310
190
Specific Heat Capacity, J/kg-K 270
400
Thermal Conductivity, W/m-K 42
100
Thermal Expansion, µm/m-K 7.3
19

Otherwise Unclassified Properties

Density, g/cm3 8.6
8.3
Embodied Water, L/kg 160
340

Common Calculations

Resilience: Unit (Modulus of Resilience), kJ/m3 93
90
Stiffness to Weight: Axial, points 6.8
7.3
Stiffness to Weight: Bending, points 18
19
Strength to Weight: Axial, points 7.2
13
Strength to Weight: Bending, points 9.5
14
Thermal Diffusivity, mm2/s 18
30
Thermal Shock Resistance, points 21
13

Alloy Composition

Aluminum (Al), % 0
1.8 to 2.5
Arsenic (As), % 0
0.020 to 0.1
Carbon (C), % 0 to 0.010
0
Copper (Cu), % 0
76 to 79
Hafnium (Hf), % 0 to 0.020
0
Hydrogen (H), % 0 to 0.0015
0
Iron (Fe), % 0 to 0.010
0 to 0.060
Lead (Pb), % 0
0 to 0.070
Molybdenum (Mo), % 0 to 0.050
0
Nickel (Ni), % 0 to 0.0050
0
Niobium (Nb), % 98.1 to 99.2
0
Nitrogen (N), % 0 to 0.010
0
Oxygen (O), % 0 to 0.025
0
Silicon (Si), % 0 to 0.0050
0
Tantalum (Ta), % 0 to 0.5
0
Titanium (Ti), % 0 to 0.020
0
Tungsten (W), % 0 to 0.050
0
Zinc (Zn), % 0
17.8 to 22.2
Zirconium (Zr), % 0.8 to 1.2
0
Residuals, % 0
0 to 0.5