Solder Alloy 181 vs. Austempered Cast Iron
Solder alloy 181 belongs to the otherwise unclassified metals classification, while austempered cast iron belongs to the iron alloys. There are 20 material properties with values for both materials. Properties with values for just one material (8, in this case) are not shown.
For each property being compared, the top bar is solder alloy 181 and the bottom bar is austempered cast iron.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 18 | |
| 180 |
| Elongation at Break, % | 41 | |
| 1.1 to 13 |
| Poisson's Ratio | 0.44 | |
| 0.29 |
| Shear Modulus, GPa | 6.1 | |
| 62 to 69 |
| Tensile Strength: Ultimate (UTS), MPa | 27 | |
| 860 to 1800 |
Thermal Properties
| Latent Heat of Fusion, J/g | 26 | |
| 280 |
| Melting Completion (Liquidus), °C | 310 | |
| 1380 |
| Melting Onset (Solidus), °C | 300 | |
| 1340 |
| Specific Heat Capacity, J/kg-K | 130 | |
| 490 |
| Thermal Conductivity, W/m-K | 24 | |
| 42 |
| Thermal Expansion, µm/m-K | 29 | |
| 13 |
Otherwise Unclassified Properties
| Density, g/cm3 | 11 | |
| 7.5 |
| Embodied Carbon, kg CO2/kg material | 6.2 | |
| 1.8 |
| Embodied Energy, MJ/kg | 100 | |
| 25 |
Common Calculations
| Stiffness to Weight: Axial, points | 0.86 | |
| 13 |
| Stiffness to Weight: Bending, points | 7.7 | |
| 25 |
| Strength to Weight: Axial, points | 0.66 | |
| 32 to 66 |
| Strength to Weight: Bending, points | 1.8 | |
| 27 to 44 |
| Thermal Diffusivity, mm2/s | 16 | |
| 11 |
| Thermal Shock Resistance, points | 3.8 | |
| 25 to 53 |
Alloy Composition
| Aluminum (Al), % | 0 to 0.0010 | |
| 0 to 0.050 |
| Antimony (Sb), % | 0 to 0.2 | |
| 0 |
| Arsenic (As), % | 0 to 0.030 | |
| 0 to 0.020 |
| Bismuth (Bi), % | 0 to 0.1 | |
| 0 |
| Cadmium (Cd), % | 0 to 0.0020 | |
| 0 |
| Carbon (C), % | 0 | |
| 3.4 to 3.8 |
| Chromium (Cr), % | 0 | |
| 0 to 0.1 |
| Copper (Cu), % | 0 to 0.080 | |
| 0 to 0.8 |
| Gold (Au), % | 0 to 0.050 | |
| 0 |
| Indium (In), % | 0 to 0.1 | |
| 0 |
| Iron (Fe), % | 0 to 0.020 | |
| 89.6 to 94 |
| Lead (Pb), % | 96.2 to 98 | |
| 0 |
| Magnesium (Mg), % | 0 | |
| 0 to 0.040 |
| Manganese (Mn), % | 0 | |
| 0.3 to 0.4 |
| Molybdenum (Mo), % | 0 | |
| 0 to 0.3 |
| Nickel (Ni), % | 0 to 0.010 | |
| 0 to 2.0 |
| Phosphorus (P), % | 0 | |
| 0 to 0.040 |
| Selenium (Se), % | 0 | |
| 0 to 0.030 |
| Silicon (Si), % | 0 | |
| 2.3 to 2.7 |
| Silver (Ag), % | 2.0 to 3.0 | |
| 0 |
| Sulfur (S), % | 0 | |
| 0 to 0.020 |
| Tin (Sn), % | 0 to 0.25 | |
| 0 to 0.020 |
| Vanadium (V), % | 0 | |
| 0 to 0.1 |
| Zinc (Zn), % | 0 to 0.0010 | |
| 0 |