ASTM B541 Gold vs. CR018A Copper

ASTM B541 gold belongs to the otherwise unclassified metals classification, while CR018A copper belongs to the copper alloys. There are 21 material properties with values for both materials. Properties with values for just one material (9, in this case) are not shown.

For each property being compared, the top bar is ASTM B541 gold and the bottom bar is CR018A copper.

ASTM B541 Gold Electrical Contact Alloy EN CR018A (CuAg0.07(OF)) Silver-Bearing Oxygen-Free Copper

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa		110
Elastic (Young's, Tensile) Modulus, GPa		120

Elongation at Break, %		6.0 to 14
Elongation at Break, %		15

Poisson's Ratio		0.4
Poisson's Ratio		0.34

Shear Modulus, GPa		38
Shear Modulus, GPa		43

Tensile Strength: Ultimate (UTS), MPa		670 to 1180
Tensile Strength: Ultimate (UTS), MPa		220

Tensile Strength: Yield (Proof), MPa		480 to 900
Tensile Strength: Yield (Proof), MPa		130

Thermal Properties

Latent Heat of Fusion, J/g		90
Latent Heat of Fusion, J/g		210

Melting Completion (Liquidus), °C		1110
Melting Completion (Liquidus), °C		1090

Melting Onset (Solidus), °C		930
Melting Onset (Solidus), °C		1040

Specific Heat Capacity, J/kg-K		170
Specific Heat Capacity, J/kg-K		390

Thermal Expansion, µm/m-K		13
Thermal Expansion, µm/m-K		17

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS		7.7 to 12
Electrical Conductivity: Equal Volume, % IACS		100

Electrical Conductivity: Equal Weight (Specific), % IACS		4.0 to 6.2
Electrical Conductivity: Equal Weight (Specific), % IACS		100

Otherwise Unclassified Properties

Density, g/cm³		17
Density, g/cm³		9.0

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m³		65 to 91
Resilience: Ultimate (Unit Rupture Work), MJ/m³		29

Resilience: Unit (Modulus of Resilience), kJ/m³		1090 to 3830
Resilience: Unit (Modulus of Resilience), kJ/m³		76

Stiffness to Weight: Axial, points		3.4
Stiffness to Weight: Axial, points		7.2

Stiffness to Weight: Bending, points		9.0
Stiffness to Weight: Bending, points		18

Strength to Weight: Axial, points		11 to 19
Strength to Weight: Axial, points		6.8

Strength to Weight: Bending, points		9.8 to 14
Strength to Weight: Bending, points		9.0

Thermal Shock Resistance, points		36 to 63
Thermal Shock Resistance, points		7.8

Alloy Composition

Bismuth (Bi), %		0
Bismuth (Bi), %		0 to 0.00050

Copper (Cu), %		13.5 to 15.5
Copper (Cu), %		99.914 to 99.94

Gold (Au), %		70.5 to 72.5
Gold (Au), %		0

Platinum (Pt), %		8.0 to 9.0
Platinum (Pt), %		0

Silver (Ag), %		4.0 to 5.0
Silver (Ag), %		0.060 to 0.080

Zinc (Zn), %		0.7 to 1.3
Zinc (Zn), %		0

Residuals, %		0 to 0.4
Residuals, %		0