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ASTM B685 Alloy vs. C12900 Copper

ASTM B685 alloy belongs to the otherwise unclassified metals classification, while C12900 copper belongs to the copper alloys. They have 40% of their average alloy composition in common. There are 17 material properties with values for both materials. Properties with values for just one material (13, in this case) are not shown.

For each property being compared, the top bar is ASTM B685 alloy and the bottom bar is C12900 copper.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 120
120
Poisson's Ratio 0.37
0.34
Shear Modulus, GPa 43
43
Tensile Strength: Ultimate (UTS), MPa 660 to 1060
220 to 420

Thermal Properties

Latent Heat of Fusion, J/g 180
210
Melting Completion (Liquidus), °C 1230
1080
Melting Onset (Solidus), °C 1200
1030
Specific Heat Capacity, J/kg-K 300
390
Thermal Expansion, µm/m-K 14
17

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 5.0
98
Electrical Conductivity: Equal Weight (Specific), % IACS 4.1
98

Otherwise Unclassified Properties

Density, g/cm3 11
9.0

Common Calculations

Stiffness to Weight: Axial, points 6.1
7.2
Stiffness to Weight: Bending, points 15
18
Strength to Weight: Axial, points 17 to 27
6.8 to 13
Strength to Weight: Bending, points 16 to 21
9.1 to 14
Thermal Shock Resistance, points 28 to 46
7.8 to 15

Alloy Composition

Aluminum (Al), % 0 to 0.0050
0
Antimony (Sb), % 0
0 to 0.0030
Arsenic (As), % 0
0 to 0.012
Bismuth (Bi), % 0
0 to 0.0030
Cadmium (Cd), % 0 to 0.050
0
Copper (Cu), % 39.5 to 40.5
99.88 to 100
Iron (Fe), % 0 to 0.050
0
Lead (Pb), % 0 to 0.030
0 to 0.0040
Nickel (Ni), % 0
0 to 0.050
Palladium (Pd), % 59 to 60.5
0
Silver (Ag), % 0 to 0.1
0 to 0.054
Tellurium (Te), % 0
0 to 0.025
Zinc (Zn), % 0 to 0.060
0
Residuals, % 0 to 0.2
0