Solder Alloy 171 vs. SAE-AISI P21 Steel
Solder alloy 171 belongs to the otherwise unclassified metals classification, while SAE-AISI P21 steel belongs to the iron alloys. There are 21 material properties with values for both materials. Properties with values for just one material (5, in this case) are not shown.
For each property being compared, the top bar is solder alloy 171 and the bottom bar is SAE-AISI P21 steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 38 | |
| 190 |
| Poisson's Ratio | 0.39 | |
| 0.29 |
| Shear Modulus, GPa | 14 | |
| 73 |
| Tensile Strength: Ultimate (UTS), MPa | 48 | |
| 1130 |
Thermal Properties
| Latent Heat of Fusion, J/g | 47 | |
| 250 |
| Melting Completion (Liquidus), °C | 180 | |
| 1450 |
| Melting Onset (Solidus), °C | 180 | |
| 1410 |
| Specific Heat Capacity, J/kg-K | 190 | |
| 470 |
| Thermal Conductivity, W/m-K | 50 | |
| 41 |
| Thermal Expansion, µm/m-K | 24 | |
| 12 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 12 | |
| 7.9 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 12 | |
| 9.0 |
Otherwise Unclassified Properties
| Density, g/cm3 | 8.8 | |
| 7.9 |
| Embodied Carbon, kg CO2/kg material | 13 | |
| 2.3 |
| Embodied Energy, MJ/kg | 210 | |
| 32 |
Common Calculations
| Stiffness to Weight: Axial, points | 2.4 | |
| 13 |
| Stiffness to Weight: Bending, points | 13 | |
| 24 |
| Strength to Weight: Axial, points | 1.5 | |
| 40 |
| Strength to Weight: Bending, points | 3.3 | |
| 31 |
| Thermal Diffusivity, mm2/s | 30 | |
| 11 |
| Thermal Shock Resistance, points | 3.7 | |
| 37 |
Alloy Composition
| Aluminum (Al), % | 0 to 0.0010 | |
| 0 |
| Antimony (Sb), % | 0 to 0.2 | |
| 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 | |
| 0.18 to 0.22 |
| Chromium (Cr), % | 0 | |
| 0 to 0.5 |
| Cobalt (Co), % | 0 | |
| 1.1 to 1.3 |
| Copper (Cu), % | 0 to 0.080 | |
| 0 to 0.25 |
| Gold (Au), % | 0 to 0.050 | |
| 0 |
| Indium (In), % | 0 to 0.1 | |
| 0 |
| Iron (Fe), % | 0 to 0.020 | |
| 92.1 to 94.2 |
| Lead (Pb), % | 34.7 to 36.7 | |
| 0 |
| Manganese (Mn), % | 0 | |
| 0.35 to 0.72 |
| Nickel (Ni), % | 0 to 0.010 | |
| 3.9 to 4.3 |
| Phosphorus (P), % | 0 | |
| 0 to 0.030 |
| Silicon (Si), % | 0 | |
| 0.2 to 0.4 |
| Silver (Ag), % | 1.8 to 2.2 | |
| 0 |
| Sulfur (S), % | 0 | |
| 0 to 0.030 |
| Tin (Sn), % | 61.5 to 62.5 | |
| 0 |
| Vanadium (V), % | 0 | |
| 0.15 to 0.25 |
| Zinc (Zn), % | 0 to 0.0010 | |
| 0 |