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ASTM B522 Class I vs. C95820 Bronze

ASTM B522 class I belongs to the otherwise unclassified metals classification, while C95820 bronze belongs to the copper alloys. There are 21 material properties with values for both materials. Properties with values for just one material (9, in this case) are not shown. Please note that the two materials have significantly dissimilar densities. This means that additional care is required when interpreting the data, because some material properties are based on units of mass, while others are based on units of area or volume.

For each property being compared, the top bar is ASTM B522 class I and the bottom bar is C95820 bronze.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 96
120
Elongation at Break, % 1.1 to 29
15
Poisson's Ratio 0.41
0.34
Shear Modulus, GPa 34
44
Tensile Strength: Ultimate (UTS), MPa 280 to 490
730
Tensile Strength: Yield (Proof), MPa 120 to 210
310

Thermal Properties

Latent Heat of Fusion, J/g 77
230
Melting Completion (Liquidus), °C 1030
1080
Melting Onset (Solidus), °C 1030
1020
Specific Heat Capacity, J/kg-K 160
440
Thermal Expansion, µm/m-K 15
17

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 11
7.5
Electrical Conductivity: Equal Weight (Specific), % IACS 5.8
8.2

Otherwise Unclassified Properties

Density, g/cm3 17
8.3

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 4.5 to 64
86
Resilience: Unit (Modulus of Resilience), kJ/m3 75 to 230
400
Stiffness to Weight: Axial, points 3.1
8.0
Stiffness to Weight: Bending, points 8.9
20
Strength to Weight: Axial, points 4.4 to 7.8
24
Strength to Weight: Bending, points 5.5 to 8.0
22
Thermal Shock Resistance, points 13 to 24
25

Alloy Composition

Aluminum (Al), % 0
9.0 to 10
Copper (Cu), % 0
77.5 to 82.5
Gold (Au), % 68 to 70
0
Iron (Fe), % 0
4.0 to 5.0
Lead (Pb), % 0
0 to 0.020
Manganese (Mn), % 0
0 to 1.5
Nickel (Ni), % 0
4.5 to 5.8
Platinum (Pt), % 5.0 to 7.0
0
Silicon (Si), % 0
0 to 0.1
Silver (Ag), % 23.5 to 26.5
0
Tin (Sn), % 0
0 to 0.020
Zinc (Zn), % 0
0 to 0.2
Residuals, % 0
0 to 0.8