AWS BAg-26 vs. Solder Alloy 702

Both AWS BAg-26 and solder alloy 702 are otherwise unclassified metals. Both are furnished in the as-fabricated (no temper or treatment) condition. There are 17 material properties with values for both materials. Properties with values for just one material (6, in this case) are not shown.

For each property being compared, the top bar is AWS BAg-26 and the bottom bar is solder alloy 702.

AWS BAg-26 (P07250) Filler Metal ISO Solder Alloy 702 (IEC A30, Sn97Ag3)

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa		98
Elastic (Young's, Tensile) Modulus, GPa		51

Poisson's Ratio		0.32
Poisson's Ratio		0.36

Shear Modulus, GPa		37
Shear Modulus, GPa		19

Tensile Strength: Ultimate (UTS), MPa		160
Tensile Strength: Ultimate (UTS), MPa		53

Thermal Properties

Latent Heat of Fusion, J/g		160
Latent Heat of Fusion, J/g		61

Melting Completion (Liquidus), °C		800
Melting Completion (Liquidus), °C		220

Melting Onset (Solidus), °C		710
Melting Onset (Solidus), °C		220

Specific Heat Capacity, J/kg-K		350
Specific Heat Capacity, J/kg-K		220

Thermal Expansion, µm/m-K		21
Thermal Expansion, µm/m-K		22

Otherwise Unclassified Properties

Density, g/cm³		8.5
Density, g/cm³		7.4

Embodied Carbon, kg CO₂/kg material		26
Embodied Carbon, kg CO₂/kg material		17

Embodied Energy, MJ/kg		410
Embodied Energy, MJ/kg		290

Common Calculations

Stiffness to Weight: Axial, points		6.4
Stiffness to Weight: Axial, points		3.8

Stiffness to Weight: Bending, points		18
Stiffness to Weight: Bending, points		17

Strength to Weight: Axial, points		5.2
Strength to Weight: Axial, points		2.0

Strength to Weight: Bending, points		7.7
Strength to Weight: Bending, points		4.2

Thermal Shock Resistance, points		5.6
Thermal Shock Resistance, points		3.4

Alloy Composition

Aluminum (Al), %		0
Aluminum (Al), %		0 to 0.0010

Antimony (Sb), %		0
Antimony (Sb), %		0 to 0.1

Arsenic (As), %		0
Arsenic (As), %		0 to 0.030

Bismuth (Bi), %		0
Bismuth (Bi), %		0 to 0.1

Cadmium (Cd), %		0
Cadmium (Cd), %		0 to 0.0020

Copper (Cu), %		37 to 39
Copper (Cu), %		0 to 0.050

Gold (Au), %		0
Gold (Au), %		0 to 0.050

Indium (In), %		0
Indium (In), %		0 to 0.1

Iron (Fe), %		0
Iron (Fe), %		0 to 0.020

Lead (Pb), %		0
Lead (Pb), %		0 to 0.070

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

Nickel (Ni), %		1.5 to 2.5
Nickel (Ni), %		0 to 0.010

Silver (Ag), %		24 to 26
Silver (Ag), %		2.8 to 3.2

Tin (Sn), %		0
Tin (Sn), %		96.3 to 97.2

Zinc (Zn), %		31 to 35
Zinc (Zn), %		0 to 0.0010

Residuals, %		0 to 0.15
Residuals, %		0