ASTM A302 Alloy Steel vs. Solder Alloy 121
ASTM A302 alloy steel belongs to the iron alloys classification, while solder alloy 121 belongs to the otherwise unclassified metals. There are 25 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 ASTM A302 alloy steel and the bottom bar is solder alloy 121.
Metric UnitsUS Customary Units
Mechanical Properties
| Brinell Hardness | 180 to 190 | |
| 11 |
| Elastic (Young's, Tensile) Modulus, GPa | 190 | |
| 21 |
| Elongation at Break, % | 20 to 23 | |
| 25 |
| Poisson's Ratio | 0.29 | |
| 0.43 |
| Shear Modulus, GPa | 73 | |
| 7.5 |
| Tensile Strength: Ultimate (UTS), MPa | 590 to 620 | |
| 32 |
Thermal Properties
| Latent Heat of Fusion, J/g | 250 | |
| 29 |
| Melting Completion (Liquidus), °C | 1460 | |
| 290 |
| Melting Onset (Solidus), °C | 1420 | |
| 230 |
| Specific Heat Capacity, J/kg-K | 470 | |
| 140 |
| Thermal Conductivity, W/m-K | 39 to 51 | |
| 31 |
| Thermal Expansion, µm/m-K | 13 | |
| 28 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 7.2 to 7.4 | |
| 8.8 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 8.2 to 8.4 | |
| 7.4 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 2.4 to 3.0 | |
| 80 |
| Density, g/cm3 | 7.8 to 7.9 | |
| 11 |
| Embodied Carbon, kg CO2/kg material | 1.5 to 1.6 | |
| 5.6 |
| Embodied Energy, MJ/kg | 20 to 21 | |
| 93 |
| Embodied Water, L/kg | 48 to 50 | |
| 580 |
Common Calculations
| Stiffness to Weight: Axial, points | 13 | |
| 1.1 |
| Stiffness to Weight: Bending, points | 24 | |
| 8.6 |
| Strength to Weight: Axial, points | 21 to 22 | |
| 0.84 |
| Strength to Weight: Bending, points | 20 to 21 | |
| 2.1 |
| Thermal Diffusivity, mm2/s | 10 to 14 | |
| 20 |
| Thermal Shock Resistance, points | 17 to 18 | |
| 3.9 |