ASTM A387 Grade 21L Class 1 vs. Type 2 Magnetic Alloy
Both ASTM A387 grade 21L class 1 and Type 2 magnetic alloy are iron alloys. They have 52% of their average alloy composition in common. There are 25 material properties with values for both materials. Properties with values for just one material (8, in this case) are not shown.
For each property being compared, the top bar is ASTM A387 grade 21L class 1 and the bottom bar is Type 2 magnetic alloy.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 190 | |
| 190 |
| Elongation at Break, % | 21 | |
| 2.0 to 38 |
| Poisson's Ratio | 0.29 | |
| 0.3 |
| Shear Modulus, GPa | 74 | |
| 72 |
| Tensile Strength: Ultimate (UTS), MPa | 500 | |
| 510 to 910 |
| Tensile Strength: Yield (Proof), MPa | 230 | |
| 260 to 870 |
Thermal Properties
| Latent Heat of Fusion, J/g | 260 | |
| 270 |
| Melting Completion (Liquidus), °C | 1470 | |
| 1420 |
| Melting Onset (Solidus), °C | 1430 | |
| 1370 |
| Specific Heat Capacity, J/kg-K | 470 | |
| 460 |
| Thermal Expansion, µm/m-K | 13 | |
| 12 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 7.6 | |
| 3.9 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 8.8 | |
| 4.2 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 4.1 | |
| 33 |
| Density, g/cm3 | 7.9 | |
| 8.4 |
| Embodied Carbon, kg CO2/kg material | 1.8 | |
| 5.9 |
| Embodied Energy, MJ/kg | 23 | |
| 81 |
| Embodied Water, L/kg | 62 | |
| 140 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 84 | |
| 18 to 160 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 140 | |
| 170 to 2010 |
| Stiffness to Weight: Axial, points | 13 | |
| 12 |
| Stiffness to Weight: Bending, points | 24 | |
| 23 |
| Strength to Weight: Axial, points | 18 | |
| 17 to 30 |
| Strength to Weight: Bending, points | 18 | |
| 17 to 25 |
| Thermal Shock Resistance, points | 14 | |
| 16 to 29 |
Alloy Composition
| Carbon (C), % | 0 to 0.1 | |
| 0 to 0.050 |
| Chromium (Cr), % | 2.8 to 3.3 | |
| 0 to 0.3 |
| Cobalt (Co), % | 0 | |
| 0 to 0.5 |
| Copper (Cu), % | 0 | |
| 0 to 0.3 |
| Iron (Fe), % | 94.4 to 96.1 | |
| 48.2 to 53 |
| Manganese (Mn), % | 0.3 to 0.6 | |
| 0 to 0.8 |
| Molybdenum (Mo), % | 0.9 to 1.1 | |
| 0 to 0.3 |
| Nickel (Ni), % | 0 | |
| 47 to 49 |
| Phosphorus (P), % | 0 to 0.025 | |
| 0 to 0.010 |
| Silicon (Si), % | 0 to 0.5 | |
| 0 to 0.5 |
| Sulfur (S), % | 0 to 0.025 | |
| 0 to 0.030 |