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Nuclear Grade Hafnium vs. C85400 Brass

Nuclear grade hafnium belongs to the otherwise unclassified metals classification, while C85400 brass belongs to the copper alloys. There are 17 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 nuclear grade hafnium and the bottom bar is C85400 brass.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 78
100
Elongation at Break, % 25
23
Poisson's Ratio 0.26
0.32
Shear Modulus, GPa 31
40
Tensile Strength: Ultimate (UTS), MPa 350
220
Tensile Strength: Yield (Proof), MPa 170
85

Thermal Properties

Latent Heat of Fusion, J/g 130
180
Specific Heat Capacity, J/kg-K 140
380
Thermal Expansion, µm/m-K 5.9
20

Otherwise Unclassified Properties

Density, g/cm3 13
8.3

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 73
40
Resilience: Unit (Modulus of Resilience), kJ/m3 180
35
Stiffness to Weight: Axial, points 3.3
7.0
Stiffness to Weight: Bending, points 11
19
Strength to Weight: Axial, points 7.4
7.5
Strength to Weight: Bending, points 8.4
9.9
Thermal Shock Resistance, points 55
7.6

Alloy Composition

Aluminum (Al), % 0
0 to 0.35
Copper (Cu), % 0
65 to 70
Hafnium (Hf), % 99.8 to 100
0
Iron (Fe), % 0
0 to 0.7
Lead (Pb), % 0
1.5 to 3.8
Nickel (Ni), % 0
0 to 1.0
Silicon (Si), % 0
0 to 0.050
Tin (Sn), % 0
0.5 to 1.5
Zinc (Zn), % 0
24 to 32
Residuals, % 0
0 to 1.1