Solder Alloy 121 vs. ASTM A732 Cast Steel
Solder alloy 121 belongs to the otherwise unclassified metals classification, while ASTM A732 cast steel belongs to the iron alloys. There are 25 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 121 and the bottom bar is ASTM A732 cast steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Brinell Hardness | 11 | |
| 140 to 440 |
| Elastic (Young's, Tensile) Modulus, GPa | 21 | |
| 190 |
| Elongation at Break, % | 25 | |
| 4.0 to 25 |
| Poisson's Ratio | 0.43 | |
| 0.29 |
| Shear Modulus, GPa | 7.5 | |
| 72 to 73 |
| Tensile Strength: Ultimate (UTS), MPa | 32 | |
| 460 to 1470 |
Thermal Properties
| Latent Heat of Fusion, J/g | 29 | |
| 250 to 260 |
| Melting Completion (Liquidus), °C | 290 | |
| 1440 to 1460 |
| Melting Onset (Solidus), °C | 230 | |
| 1400 to 1420 |
| Specific Heat Capacity, J/kg-K | 140 | |
| 470 to 480 |
| Thermal Conductivity, W/m-K | 31 | |
| 39 to 50 |
| Thermal Expansion, µm/m-K | 28 | |
| 13 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 8.8 | |
| 7.1 to 7.7 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 7.4 | |
| 8.2 to 8.9 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 80 | |
| 2.0 to 3.8 |
| Density, g/cm3 | 11 | |
| 7.8 to 7.9 |
| Embodied Carbon, kg CO2/kg material | 5.6 | |
| 1.4 to 1.7 |
| Embodied Energy, MJ/kg | 93 | |
| 19 to 24 |
| Embodied Water, L/kg | 580 | |
| 47 to 54 |
Common Calculations
| Stiffness to Weight: Axial, points | 1.1 | |
| 13 |
| Stiffness to Weight: Bending, points | 8.6 | |
| 24 |
| Strength to Weight: Axial, points | 0.84 | |
| 16 to 52 |
| Strength to Weight: Bending, points | 2.1 | |
| 17 to 37 |
| Thermal Diffusivity, mm2/s | 20 | |
| 10 to 14 |
| Thermal Shock Resistance, points | 3.9 | |
| 14 to 43 |