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Solder Alloy 704 vs. K94200 Alloy

Solder alloy 704 belongs to the otherwise unclassified metals classification, while K94200 alloy belongs to the iron alloys. There are 18 material properties with values for both materials. Properties with values for just one material (10, in this case) are not shown.

For each property being compared, the top bar is solder alloy 704 and the bottom bar is K94200 alloy.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 51
140
Elongation at Break, % 30
5.0 to 32
Poisson's Ratio 0.36
0.34
Shear Modulus, GPa 19
54
Tensile Strength: Ultimate (UTS), MPa 55
500 to 710

Thermal Properties

Melting Onset (Solidus), °C 220
1440
Specific Heat Capacity, J/kg-K 220
500
Thermal Conductivity, W/m-K 50
15
Thermal Expansion, µm/m-K 22
5.0

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 13
2.7
Electrical Conductivity: Equal Weight (Specific), % IACS 15
3.0

Otherwise Unclassified Properties

Density, g/cm3 7.5
8.2

Common Calculations

Stiffness to Weight: Axial, points 3.8
9.8
Stiffness to Weight: Bending, points 17
21
Strength to Weight: Axial, points 2.1
17 to 24
Strength to Weight: Bending, points 4.3
17 to 22
Thermal Diffusivity, mm2/s 30
3.7
Thermal Shock Resistance, points 3.5
49 to 70