ASTM A387 Grade 21 Steel vs. Type 2 Pewter
ASTM A387 grade 21 steel belongs to the iron alloys classification, while Type 2 pewter belongs to the otherwise unclassified metals. There are 20 material properties with values for both materials. Properties with values for just one material (12, 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 Type 2 pewter.
Metric UnitsUS Customary Units
Mechanical Properties
| Brinell Hardness | 150 to 180 | |
| 13 to 23 |
| Elastic (Young's, Tensile) Modulus, GPa | 190 | |
| 52 |
| Poisson's Ratio | 0.29 | |
| 0.35 |
| Shear Modulus, GPa | 74 | |
| 19 |
| Tensile Strength: Ultimate (UTS), MPa | 500 to 590 | |
| 52 to 68 |
Thermal Properties
| Latent Heat of Fusion, J/g | 260 | |
| 69 |
| Melting Completion (Liquidus), °C | 1470 | |
| 300 |
| Melting Onset (Solidus), °C | 1430 | |
| 240 |
| Specific Heat Capacity, J/kg-K | 470 | |
| 220 |
| Thermal Expansion, µm/m-K | 13 | |
| 21 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 4.1 | |
| 75 |
| Density, g/cm3 | 7.9 | |
| 7.3 |
| Embodied Carbon, kg CO2/kg material | 1.8 | |
| 12 |
| Embodied Energy, MJ/kg | 23 | |
| 210 |
| Embodied Water, L/kg | 62 | |
| 1220 |
Common Calculations
| Stiffness to Weight: Axial, points | 13 | |
| 3.9 |
| Stiffness to Weight: Bending, points | 24 | |
| 17 |
| Strength to Weight: Axial, points | 18 to 21 | |
| 2.0 to 2.6 |
| Strength to Weight: Bending, points | 18 to 20 | |
| 4.3 to 5.1 |
| Thermal Shock Resistance, points | 14 to 17 | |
| 3.4 to 4.4 |
Alloy Composition
| Antimony (Sb), % | 0 | |
| 5.0 to 7.5 |
| Arsenic (As), % | 0 | |
| 0 to 0.050 |
| Carbon (C), % | 0.050 to 0.15 | |
| 0 |
| Chromium (Cr), % | 2.8 to 3.3 | |
| 0 |
| Copper (Cu), % | 0 | |
| 1.5 to 3.0 |
| Iron (Fe), % | 94.4 to 96 | |
| 0 to 0.015 |
| Lead (Pb), % | 0 | |
| 0 to 0.050 |
| 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 | |
| 90 to 93 |
| Zinc (Zn), % | 0 | |
| 0 to 0.0050 |