Full-hard ASTM B617 vs. Full-hard ASTM B628

Both full-hard ASTM B617 and full-hard ASTM B628 are otherwise unclassified metals. Both are furnished in the full-hard temper. They have 82% of their average alloy composition in common.

For each property being compared, the top bar is full-hard ASTM B617 and the bottom bar is full-hard ASTM B628.

Full-Hard ASTM B617 Coin Silver Alloy Full-Hard ASTM B628 Silver-Copper Eutectic Alloy

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa		75
Elastic (Young's, Tensile) Modulus, GPa		83

Elongation at Break, %		1.1
Elongation at Break, %		2.2

Poisson's Ratio		0.37
Poisson's Ratio		0.36

Shear Modulus, GPa		28
Shear Modulus, GPa		31

Shear Strength, MPa		260
Shear Strength, MPa		310

Tensile Strength: Ultimate (UTS), MPa		460
Tensile Strength: Ultimate (UTS), MPa		540

Thermal Properties

Latent Heat of Fusion, J/g		120
Latent Heat of Fusion, J/g		140

Melting Completion (Liquidus), °C		870
Melting Completion (Liquidus), °C		780

Melting Onset (Solidus), °C		780
Melting Onset (Solidus), °C		780

Specific Heat Capacity, J/kg-K		250
Specific Heat Capacity, J/kg-K		280

Thermal Expansion, µm/m-K		19
Thermal Expansion, µm/m-K		19

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS		83
Electrical Conductivity: Equal Volume, % IACS		84

Electrical Conductivity: Equal Weight (Specific), % IACS		72
Electrical Conductivity: Equal Weight (Specific), % IACS		75

Otherwise Unclassified Properties

Density, g/cm³		10
Density, g/cm³		10

Common Calculations

Stiffness to Weight: Axial, points		4.1
Stiffness to Weight: Axial, points		4.6

Stiffness to Weight: Bending, points		14
Stiffness to Weight: Bending, points		14

Strength to Weight: Axial, points		12
Strength to Weight: Axial, points		15

Strength to Weight: Bending, points		13
Strength to Weight: Bending, points		15

Thermal Shock Resistance, points		22
Thermal Shock Resistance, points		24

Alloy Composition

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Aluminum (Al), %		0 to 0.0050
Aluminum (Al), %		0 to 0.0050

Cadmium (Cd), %		0 to 0.050
Cadmium (Cd), %		0 to 0.050

Copper (Cu), %		9.0 to 10.4
Copper (Cu), %		26.6 to 29

Iron (Fe), %		0 to 0.050
Iron (Fe), %		0 to 0.050

Lead (Pb), %		0 to 0.030
Lead (Pb), %		0 to 0.030

Nickel (Ni), %		0 to 0.010
Nickel (Ni), %		0 to 0.010

Phosphorus (P), %		0 to 0.020
Phosphorus (P), %		0 to 0.030

Silver (Ag), %		89.6 to 91
Silver (Ag), %		71 to 73

Zinc (Zn), %		0 to 0.060
Zinc (Zn), %		0 to 0.060

Residuals, %		0 to 0.060
Residuals, %		0 to 0.21