Solder Alloy 191 vs. SAE-AISI M2 Steel
Solder alloy 191 belongs to the otherwise unclassified metals classification, while SAE-AISI M2 steel belongs to the iron alloys. There are 19 material properties with values for both materials. Properties with values for just one material (6, in this case) are not shown.
For each property being compared, the top bar is solder alloy 191 and the bottom bar is SAE-AISI M2 steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 19 | |
| 200 |
| Poisson's Ratio | 0.43 | |
| 0.29 |
| Shear Modulus, GPa | 6.5 | |
| 77 |
| Tensile Strength: Ultimate (UTS), MPa | 29 | |
| 760 to 2150 |
Thermal Properties
| Latent Heat of Fusion, J/g | 27 | |
| 260 |
| Melting Completion (Liquidus), °C | 300 | |
| 1610 |
| Melting Onset (Solidus), °C | 300 | |
| 1570 |
| Specific Heat Capacity, J/kg-K | 130 | |
| 440 |
| Thermal Conductivity, W/m-K | 24 | |
| 22 |
| Thermal Expansion, µm/m-K | 29 | |
| 10 |
Otherwise Unclassified Properties
| Density, g/cm3 | 11 | |
| 8.4 |
| Embodied Carbon, kg CO2/kg material | 5.8 | |
| 8.8 |
| Embodied Energy, MJ/kg | 95 | |
| 130 |
Common Calculations
| Stiffness to Weight: Axial, points | 0.93 | |
| 13 |
| Stiffness to Weight: Bending, points | 8.0 | |
| 23 |
| Strength to Weight: Axial, points | 0.72 | |
| 25 to 71 |
| Strength to Weight: Bending, points | 1.9 | |
| 22 to 44 |
| Thermal Diffusivity, mm2/s | 16 | |
| 5.9 |
| Thermal Shock Resistance, points | 3.9 | |
| 27 to 76 |
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 | |
| 0.78 to 1.1 |
| Chromium (Cr), % | 0 | |
| 3.8 to 4.5 |
| 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 | |
| 78.5 to 83.4 |
| Lead (Pb), % | 92.4 to 94 | |
| 0 |
| Manganese (Mn), % | 0 | |
| 0.15 to 0.4 |
| Molybdenum (Mo), % | 0 | |
| 4.5 to 5.5 |
| Nickel (Ni), % | 0 to 0.010 | |
| 0 to 0.3 |
| Phosphorus (P), % | 0 | |
| 0 to 0.030 |
| Silicon (Si), % | 0 | |
| 0.2 to 0.45 |
| Silver (Ag), % | 1.2 to 1.8 | |
| 0 |
| Sulfur (S), % | 0 | |
| 0 to 0.030 |
| Tin (Sn), % | 4.8 to 5.2 | |
| 0 |
| Tungsten (W), % | 0 | |
| 5.5 to 6.8 |
| Vanadium (V), % | 0 | |
| 1.8 to 2.2 |
| Zinc (Zn), % | 0 to 0.0010 | |
| 0 |