ASTM A387 Grade 21 Steel vs. Grade 8 Babbitt Metal
ASTM A387 grade 21 steel belongs to the iron alloys classification, while grade 8 Babbitt Metal belongs to the otherwise unclassified metals. There are 20 material properties with values for both materials. Properties with values for just one material (13, in this case) are not shown.
For each property being compared, the top bar is ASTM A387 grade 21 steel and the bottom bar is grade 8 Babbitt Metal.
Metric UnitsUS Customary Units
Mechanical Properties
| Brinell Hardness | 150 to 180 | |
| 15 |
| Elastic (Young's, Tensile) Modulus, GPa | 190 | |
| 24 |
| Poisson's Ratio | 0.29 | |
| 0.41 |
| Shear Modulus, GPa | 74 | |
| 8.5 |
| Tensile Strength: Yield (Proof), MPa | 230 to 350 | |
| 23 |
Thermal Properties
| Latent Heat of Fusion, J/g | 260 | |
| 46 |
| Melting Completion (Liquidus), °C | 1470 | |
| 270 |
| Melting Onset (Solidus), °C | 1430 | |
| 240 |
| Specific Heat Capacity, J/kg-K | 470 | |
| 150 |
| Thermal Conductivity, W/m-K | 41 | |
| 24 |
| Thermal Expansion, µm/m-K | 13 | |
| 24 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 4.1 | |
| 19 |
| Density, g/cm3 | 7.9 | |
| 10 |
| Embodied Carbon, kg CO2/kg material | 1.8 | |
| 3.9 |
| Embodied Energy, MJ/kg | 23 | |
| 53 |
| Embodied Water, L/kg | 62 | |
| 840 |
Common Calculations
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 140 to 320 | |
| 11 |
| Stiffness to Weight: Axial, points | 13 | |
| 1.3 |
| Stiffness to Weight: Bending, points | 24 | |
| 9.2 |
| Thermal Diffusivity, mm2/s | 11 | |
| 16 |
Alloy Composition
| Aluminum (Al), % | 0 | |
| 0 to 0.0050 |
| Antimony (Sb), % | 0 | |
| 14 to 16 |
| Arsenic (As), % | 0 | |
| 0.3 to 0.6 |
| Bismuth (Bi), % | 0 | |
| 0 to 0.1 |
| Cadmium (Cd), % | 0 | |
| 0 to 0.050 |
| Carbon (C), % | 0.050 to 0.15 | |
| 0 |
| Chromium (Cr), % | 2.8 to 3.3 | |
| 0 |
| Copper (Cu), % | 0 | |
| 0 to 0.5 |
| Iron (Fe), % | 94.4 to 96 | |
| 0 to 0.1 |
| Lead (Pb), % | 0 | |
| 77.1 to 81.2 |
| Manganese (Mn), % | 0.3 to 0.6 | |
| 0 |
| Molybdenum (Mo), % | 0.9 to 1.1 | |
| 0 |
| Phosphorus (P), % | 0 to 0.025 | |
| 0 |
| Silicon (Si), % | 0 to 0.5 | |
| 0 |
| Sulfur (S), % | 0 to 0.025 | |
| 0 |
| Tin (Sn), % | 0 | |
| 4.5 to 5.5 |
| Zinc (Zn), % | 0 | |
| 0 to 0.0050 |