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ASTM B477 Au-Ni-Ag vs. CR021A Copper

ASTM B477 Au-Ni-Ag belongs to the otherwise unclassified metals classification, while CR021A copper belongs to the copper alloys. There are 18 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 B477 Au-Ni-Ag and the bottom bar is CR021A copper.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 95
120
Elongation at Break, % 5.5 to 11
15
Poisson's Ratio 0.41
0.34
Shear Modulus, GPa 34
43
Tensile Strength: Ultimate (UTS), MPa 310 to 550
230

Thermal Properties

Latent Heat of Fusion, J/g 80
210
Melting Completion (Liquidus), °C 1010
1090
Melting Onset (Solidus), °C 930
1040
Specific Heat Capacity, J/kg-K 160
390
Thermal Expansion, µm/m-K 15
17

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 14
98
Electrical Conductivity: Equal Weight (Specific), % IACS 7.5
99

Otherwise Unclassified Properties

Density, g/cm3 17
9.0

Common Calculations

Stiffness to Weight: Axial, points 3.1
7.2
Stiffness to Weight: Bending, points 8.9
18
Strength to Weight: Axial, points 5.0 to 9.0
7.1
Strength to Weight: Bending, points 6.0 to 8.8
9.3
Thermal Shock Resistance, points 16 to 28
8.1

Alloy Composition

Bismuth (Bi), % 0
0 to 0.00050
Copper (Cu), % 0
99.95 to 99.998
Gold (Au), % 74.2 to 75.8
0
Lead (Pb), % 0
0 to 0.0050
Nickel (Ni), % 2.6 to 3.4
0
Phosphorus (P), % 0
0.0020 to 0.0070
Silver (Ag), % 21.4 to 22.6
0 to 0.015
Residuals, % 0 to 0.3
0