ASTM B628 Ag-Cu vs. AWS E320LR

ASTM B628 Ag-Cu belongs to the otherwise unclassified metals classification, while AWS E320LR belongs to the iron alloys. There are 16 material properties with values for both materials. Properties with values for just one material (8, in this case) are not shown.

For each property being compared, the top bar is ASTM B628 Ag-Cu and the bottom bar is AWS E320LR.

ASTM B628 Silver-Copper Eutectic Electrical Contact Alloy AWS E320LR (W88022) Weld Metal

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa		83
Elastic (Young's, Tensile) Modulus, GPa		200

Elongation at Break, %		1.1 to 17
Elongation at Break, %		34

Poisson's Ratio		0.36
Poisson's Ratio		0.28

Shear Modulus, GPa		31
Shear Modulus, GPa		77

Tensile Strength: Ultimate (UTS), MPa		350 to 760
Tensile Strength: Ultimate (UTS), MPa		580

Thermal Properties

Latent Heat of Fusion, J/g		140
Latent Heat of Fusion, J/g		300

Melting Completion (Liquidus), °C		780
Melting Completion (Liquidus), °C		1410

Melting Onset (Solidus), °C		780
Melting Onset (Solidus), °C		1360

Specific Heat Capacity, J/kg-K		280
Specific Heat Capacity, J/kg-K		460

Thermal Expansion, µm/m-K		19
Thermal Expansion, µm/m-K		14

Otherwise Unclassified Properties

Density, g/cm³		10
Density, g/cm³		8.2

Common Calculations

Stiffness to Weight: Axial, points		4.6
Stiffness to Weight: Axial, points		13

Stiffness to Weight: Bending, points		14
Stiffness to Weight: Bending, points		24

Strength to Weight: Axial, points		9.5 to 21
Strength to Weight: Axial, points		20

Strength to Weight: Bending, points		11 to 18
Strength to Weight: Bending, points		19

Thermal Shock Resistance, points		16 to 34
Thermal Shock Resistance, points		15

Alloy Composition

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

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

Carbon (C), %		0
Carbon (C), %		0 to 0.030

Chromium (Cr), %		0
Chromium (Cr), %		19 to 21

Copper (Cu), %		26.6 to 29
Copper (Cu), %		3.0 to 4.0

Iron (Fe), %		0 to 0.050
Iron (Fe), %		32.7 to 42.5

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

Manganese (Mn), %		0
Manganese (Mn), %		1.5 to 2.5

Molybdenum (Mo), %		0
Molybdenum (Mo), %		2.0 to 3.0

Nickel (Ni), %		0 to 0.010
Nickel (Ni), %		32 to 36

Niobium (Nb), %		0
Niobium (Nb), %		0 to 0.4

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

Silicon (Si), %		0
Silicon (Si), %		0 to 0.3

Silver (Ag), %		71 to 73
Silver (Ag), %		0

Sulfur (S), %		0
Sulfur (S), %		0 to 0.015

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

Residuals, %		0 to 0.21
Residuals, %		0