ASTM B522 Class I vs. C70400 Copper-nickel

ASTM B522 class I belongs to the otherwise unclassified metals classification, while C70400 copper-nickel belongs to the copper alloys. There are 19 material properties with values for both materials. Properties with values for just one material (11, in this case) are not shown.

For each property being compared, the top bar is ASTM B522 class I and the bottom bar is C70400 copper-nickel.

ASTM B522 Class I Gold-Silver-Platinum Electrical Contact Alloy UNS C70400 Copper-Nickel

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa		96
Elastic (Young's, Tensile) Modulus, GPa		120

Poisson's Ratio		0.41
Poisson's Ratio		0.34

Shear Modulus, GPa		34
Shear Modulus, GPa		45

Tensile Strength: Ultimate (UTS), MPa		280 to 490
Tensile Strength: Ultimate (UTS), MPa		300 to 310

Tensile Strength: Yield (Proof), MPa		120 to 210
Tensile Strength: Yield (Proof), MPa		95 to 230

Thermal Properties

Latent Heat of Fusion, J/g		77
Latent Heat of Fusion, J/g		210

Melting Completion (Liquidus), °C		1030
Melting Completion (Liquidus), °C		1120

Melting Onset (Solidus), °C		1030
Melting Onset (Solidus), °C		1060

Specific Heat Capacity, J/kg-K		160
Specific Heat Capacity, J/kg-K		390

Thermal Expansion, µm/m-K		15
Thermal Expansion, µm/m-K		17

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS		11
Electrical Conductivity: Equal Volume, % IACS		14

Electrical Conductivity: Equal Weight (Specific), % IACS		5.8
Electrical Conductivity: Equal Weight (Specific), % IACS		14

Otherwise Unclassified Properties

Density, g/cm³		17
Density, g/cm³		8.9

Common Calculations

Resilience: Unit (Modulus of Resilience), kJ/m³		75 to 230
Resilience: Unit (Modulus of Resilience), kJ/m³		38 to 220

Stiffness to Weight: Axial, points		3.1
Stiffness to Weight: Axial, points		7.5

Stiffness to Weight: Bending, points		8.9
Stiffness to Weight: Bending, points		19

Strength to Weight: Axial, points		4.4 to 7.8
Strength to Weight: Axial, points		9.3 to 9.8

Strength to Weight: Bending, points		5.5 to 8.0
Strength to Weight: Bending, points		11 to 12

Thermal Shock Resistance, points		13 to 24
Thermal Shock Resistance, points		10 to 11

Alloy Composition

Copper (Cu), %		0
Copper (Cu), %		89.8 to 93.6

Gold (Au), %		68 to 70
Gold (Au), %		0

Iron (Fe), %		0
Iron (Fe), %		1.3 to 1.7

Lead (Pb), %		0
Lead (Pb), %		0 to 0.050

Manganese (Mn), %		0
Manganese (Mn), %		0.3 to 0.8

Nickel (Ni), %		0
Nickel (Ni), %		4.8 to 6.2

Platinum (Pt), %		5.0 to 7.0
Platinum (Pt), %		0

Silver (Ag), %		23.5 to 26.5
Silver (Ag), %		0

Zinc (Zn), %		0
Zinc (Zn), %		0 to 1.0

Residuals, %		0
Residuals, %		0 to 0.5