Solder Alloy 704 vs. ACI-ASTM CB7Cu-2 Steel
Solder alloy 704 belongs to the otherwise unclassified metals classification, while ACI-ASTM CB7Cu-2 steel belongs to the iron alloys. There are 23 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 704 and the bottom bar is ACI-ASTM CB7Cu-2 steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Brinell Hardness | 14 | |
| 300 to 420 |
| Elastic (Young's, Tensile) Modulus, GPa | 51 | |
| 190 |
| Elongation at Break, % | 30 | |
| 5.7 to 11 |
| Poisson's Ratio | 0.36 | |
| 0.28 |
| Shear Modulus, GPa | 19 | |
| 75 |
| Tensile Strength: Ultimate (UTS), MPa | 55 | |
| 960 to 1350 |
Thermal Properties
| Latent Heat of Fusion, J/g | 62 | |
| 280 |
| Melting Completion (Liquidus), °C | 240 | |
| 1430 |
| Melting Onset (Solidus), °C | 220 | |
| 1380 |
| Specific Heat Capacity, J/kg-K | 220 | |
| 480 |
| Thermal Conductivity, W/m-K | 50 | |
| 17 |
| Thermal Expansion, µm/m-K | 22 | |
| 11 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 13 | |
| 2.1 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 15 | |
| 2.4 |
Otherwise Unclassified Properties
| Density, g/cm3 | 7.5 | |
| 7.8 |
| Embodied Carbon, kg CO2/kg material | 19 | |
| 2.6 |
| Embodied Energy, MJ/kg | 320 | |
| 38 |
Common Calculations
| Stiffness to Weight: Axial, points | 3.8 | |
| 14 |
| Stiffness to Weight: Bending, points | 17 | |
| 25 |
| Strength to Weight: Axial, points | 2.1 | |
| 34 to 48 |
| Strength to Weight: Bending, points | 4.3 | |
| 28 to 35 |
| Thermal Diffusivity, mm2/s | 30 | |
| 4.6 |
| Thermal Shock Resistance, points | 3.5 | |
| 32 to 45 |
Alloy Composition
| Aluminum (Al), % | 0 to 0.0010 | |
| 0 |
| Antimony (Sb), % | 0 to 0.1 | |
| 0 |
| Arsenic (As), % | 0 to 0.030 | |
| 0 |
| Bismuth (Bi), % | 0 to 0.1 | |
| 0 |
| Cadmium (Cd), % | 0 to 0.0020 | |
| 0 |
| Carbon (C), % | 0 | |
| 0 to 0.070 |
| Chromium (Cr), % | 0 | |
| 14 to 15.5 |
| Copper (Cu), % | 0 to 0.050 | |
| 2.5 to 3.2 |
| Gold (Au), % | 0 to 0.050 | |
| 0 |
| Indium (In), % | 0 to 0.1 | |
| 0 |
| Iron (Fe), % | 0 to 0.020 | |
| 73.6 to 79 |
| Lead (Pb), % | 0 to 0.070 | |
| 0 |
| Manganese (Mn), % | 0 | |
| 0 to 0.7 |
| Nickel (Ni), % | 0 to 0.010 | |
| 4.5 to 5.5 |
| Niobium (Nb), % | 0 | |
| 0 to 0.35 |
| Nitrogen (N), % | 0 | |
| 0 to 0.050 |
| Phosphorus (P), % | 0 | |
| 0 to 0.035 |
| Silicon (Si), % | 0 | |
| 0 to 1.0 |
| Silver (Ag), % | 4.8 to 5.2 | |
| 0 |
| Sulfur (S), % | 0 | |
| 0 to 0.030 |
| Tin (Sn), % | 94.3 to 95.2 | |
| 0 |
| Zinc (Zn), % | 0 to 0.0010 | |
| 0 |