C72900 Copper-nickel vs. AWS BAg-20

C72900 copper-nickel belongs to the copper alloys classification, while AWS BAg-20 belongs to the otherwise unclassified metals. They have a modest 38% of their average alloy composition in common, which, by itself, doesn't mean much. There are 17 material properties with values for both materials. Properties with values for just one material (13, in this case) are not shown.

For each property being compared, the top bar is C72900 copper-nickel and the bottom bar is AWS BAg-20.

UNS C72900 Tin-Bearing Copper-Nickel AWS BAg-20 (P07301) Filler Metal

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa		120
Elastic (Young's, Tensile) Modulus, GPa		93

Poisson's Ratio		0.34
Poisson's Ratio		0.32

Shear Modulus, GPa		45
Shear Modulus, GPa		35

Tensile Strength: Ultimate (UTS), MPa		870 to 1080
Tensile Strength: Ultimate (UTS), MPa		160

Thermal Properties

Latent Heat of Fusion, J/g		210
Latent Heat of Fusion, J/g		150

Melting Completion (Liquidus), °C		1120
Melting Completion (Liquidus), °C		770

Melting Onset (Solidus), °C		950
Melting Onset (Solidus), °C		680

Specific Heat Capacity, J/kg-K		380
Specific Heat Capacity, J/kg-K		340

Thermal Expansion, µm/m-K		17
Thermal Expansion, µm/m-K		21

Otherwise Unclassified Properties

Density, g/cm³		8.8
Density, g/cm³		8.6

Embodied Carbon, kg CO₂/kg material		4.6
Embodied Carbon, kg CO₂/kg material		30

Embodied Energy, MJ/kg		72
Embodied Energy, MJ/kg		480

Common Calculations

Stiffness to Weight: Axial, points		7.6
Stiffness to Weight: Axial, points		6.0

Stiffness to Weight: Bending, points		19
Stiffness to Weight: Bending, points		17

Strength to Weight: Axial, points		27 to 34
Strength to Weight: Axial, points		5.1

Strength to Weight: Bending, points		23 to 27
Strength to Weight: Bending, points		7.6

Thermal Shock Resistance, points		31 to 38
Thermal Shock Resistance, points		5.9

Alloy Composition

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Copper (Cu), %		74.1 to 78
Copper (Cu), %		37 to 39

Iron (Fe), %		0 to 0.5
Iron (Fe), %		0

Lead (Pb), %		0 to 0.020
Lead (Pb), %		0

Magnesium (Mg), %		0 to 0.15
Magnesium (Mg), %		0

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

Nickel (Ni), %		14.5 to 15.5
Nickel (Ni), %		0

Niobium (Nb), %		0 to 0.1
Niobium (Nb), %		0

Silver (Ag), %		0
Silver (Ag), %		29 to 31

Tin (Sn), %		7.5 to 8.5
Tin (Sn), %		0

Zinc (Zn), %		0 to 0.5
Zinc (Zn), %		30 to 34

Residuals, %		0 to 0.3
Residuals, %		0 to 0.15