Solder Alloy 703 vs. AWS BVAg-18

Both solder alloy 703 and AWS BVAg-18 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 (7, in this case) are not shown.

For each property being compared, the top bar is solder alloy 703 and the bottom bar is AWS BVAg-18.

ISO Solder Alloy 703 (IEC A35, Sn96.5Ag3.5)AWS BVAg-18 (P07607) Vacuum Service Filler Metal

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa		51
Elastic (Young's, Tensile) Modulus, GPa		82

Poisson's Ratio		0.36
Poisson's Ratio		0.36

Shear Modulus, GPa		19
Shear Modulus, GPa		30

Tensile Strength: Ultimate (UTS), MPa		57
Tensile Strength: Ultimate (UTS), MPa		180

Thermal Properties

Latent Heat of Fusion, J/g		61
Latent Heat of Fusion, J/g		140

Melting Completion (Liquidus), °C		220
Melting Completion (Liquidus), °C		720

Melting Onset (Solidus), °C		220
Melting Onset (Solidus), °C		600

Specific Heat Capacity, J/kg-K		220
Specific Heat Capacity, J/kg-K		280

Thermal Expansion, µm/m-K		22
Thermal Expansion, µm/m-K		19

Otherwise Unclassified Properties

Density, g/cm³		7.4
Density, g/cm³		9.7

Embodied Carbon, kg CO₂/kg material		18
Embodied Carbon, kg CO₂/kg material		59

Embodied Energy, MJ/kg		300
Embodied Energy, MJ/kg		930

Common Calculations

Stiffness to Weight: Axial, points		3.8
Stiffness to Weight: Axial, points		4.7

Stiffness to Weight: Bending, points		17
Stiffness to Weight: Bending, points		15

Strength to Weight: Axial, points		2.1
Strength to Weight: Axial, points		5.1

Strength to Weight: Bending, points		4.4
Strength to Weight: Bending, points		7.3

Thermal Shock Resistance, points		3.7
Thermal Shock Resistance, points		8.1

Alloy Composition

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

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

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

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

Cadmium (Cd), %		0 to 0.0020
Cadmium (Cd), %		0 to 0.0010

Carbon (C), %		0
Carbon (C), %		0 to 0.0050

Copper (Cu), %		0 to 0.050
Copper (Cu), %		28.5 to 31.5

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

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

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

Lead (Pb), %		0 to 0.070
Lead (Pb), %		0 to 0.0020

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

Phosphorus (P), %		0
Phosphorus (P), %		0 to 0.0020

Silver (Ag), %		3.3 to 3.7
Silver (Ag), %		59 to 61

Tin (Sn), %		95.8 to 96.7
Tin (Sn), %		9.5 to 10.5

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