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ASTM B628 Ag-Cu vs. EN 2.4964 Cobalt

ASTM B628 Ag-Cu belongs to the otherwise unclassified metals classification, while EN 2.4964 cobalt belongs to the cobalt alloys. There are 18 material properties with values for both materials. Properties with values for just one material (10, in this case) are not shown.

For each property being compared, the top bar is ASTM B628 Ag-Cu and the bottom bar is EN 2.4964 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 83
220
Elongation at Break, % 1.1 to 17
40
Poisson's Ratio 0.36
0.29
Shear Modulus, GPa 31
86
Tensile Strength: Ultimate (UTS), MPa 350 to 760
960

Thermal Properties

Latent Heat of Fusion, J/g 140
290
Melting Completion (Liquidus), °C 780
1630
Melting Onset (Solidus), °C 780
1550
Specific Heat Capacity, J/kg-K 280
400
Thermal Expansion, µm/m-K 19
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 84
1.9
Electrical Conductivity: Equal Weight (Specific), % IACS 75
1.8

Otherwise Unclassified Properties

Density, g/cm3 10
9.6

Common Calculations

Stiffness to Weight: Axial, points 4.6
13
Stiffness to Weight: Bending, points 14
21
Strength to Weight: Axial, points 9.5 to 21
28
Strength to Weight: Bending, points 11 to 18
23
Thermal Shock Resistance, points 16 to 34
25

Alloy Composition


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Aluminum (Al), % 0 to 0.0050
0
Cadmium (Cd), % 0 to 0.050
0
Carbon (C), % 0
0.050 to 0.15
Chromium (Cr), % 0
19 to 21
Cobalt (Co), % 0
46.4 to 58
Copper (Cu), % 26.6 to 29
0
Iron (Fe), % 0 to 0.050
0 to 3.0
Lead (Pb), % 0 to 0.030
0
Manganese (Mn), % 0
0 to 2.0
Nickel (Ni), % 0 to 0.010
9.0 to 11
Phosphorus (P), % 0 to 0.030
0 to 0.020
Silicon (Si), % 0
0 to 0.4
Silver (Ag), % 71 to 73
0
Sulfur (S), % 0
0 to 0.015
Tungsten (W), % 0
14 to 16
Zinc (Zn), % 0 to 0.060
0
Residuals, % 0 to 0.21
0