Grade 300 Maraging Steel vs. ASTM A387 Grade 21 Steel
Both grade 300 maraging steel and ASTM A387 grade 21 steel are iron alloys. They have 68% of their average alloy composition in common. There are 24 material properties with values for both materials. Properties with values for just one material (10, in this case) are not shown.
For each property being compared, the top bar is grade 300 maraging steel and the bottom bar is ASTM A387 grade 21 steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 190 | |
| 190 |
| Elongation at Break, % | 6.5 to 18 | |
| 21 |
| Poisson's Ratio | 0.3 | |
| 0.29 |
| Shear Modulus, GPa | 75 | |
| 74 |
| Shear Strength, MPa | 640 to 1190 | |
| 310 to 370 |
| Tensile Strength: Ultimate (UTS), MPa | 1030 to 2030 | |
| 500 to 590 |
| Tensile Strength: Yield (Proof), MPa | 760 to 1990 | |
| 230 to 350 |
Thermal Properties
| Latent Heat of Fusion, J/g | 270 | |
| 260 |
| Melting Completion (Liquidus), °C | 1480 | |
| 1470 |
| Melting Onset (Solidus), °C | 1430 | |
| 1430 |
| Specific Heat Capacity, J/kg-K | 450 | |
| 470 |
| Thermal Expansion, µm/m-K | 12 | |
| 13 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 34 | |
| 4.1 |
| Density, g/cm3 | 8.2 | |
| 7.9 |
| Embodied Carbon, kg CO2/kg material | 5.1 | |
| 1.8 |
| Embodied Energy, MJ/kg | 68 | |
| 23 |
| Embodied Water, L/kg | 150 | |
| 62 |
Common Calculations
| PREN (Pitting Resistance) | 16 | |
| 6.4 |
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 130 to 170 | |
| 84 to 110 |
| Stiffness to Weight: Axial, points | 13 | |
| 13 |
| Stiffness to Weight: Bending, points | 23 | |
| 24 |
| Strength to Weight: Axial, points | 35 to 68 | |
| 18 to 21 |
| Strength to Weight: Bending, points | 28 to 43 | |
| 18 to 20 |
| Thermal Shock Resistance, points | 31 to 62 | |
| 14 to 17 |
Alloy Composition
| Aluminum (Al), % | 0.050 to 0.15 | |
| 0 |
| Boron (B), % | 0 to 0.0030 | |
| 0 |
| Calcium (Ca), % | 0 to 0.050 | |
| 0 |
| Carbon (C), % | 0 to 0.030 | |
| 0.050 to 0.15 |
| Chromium (Cr), % | 0 | |
| 2.8 to 3.3 |
| Cobalt (Co), % | 8.5 to 9.5 | |
| 0 |
| Iron (Fe), % | 65 to 68.4 | |
| 94.4 to 96 |
| Manganese (Mn), % | 0 to 0.1 | |
| 0.3 to 0.6 |
| Molybdenum (Mo), % | 4.6 to 5.2 | |
| 0.9 to 1.1 |
| Nickel (Ni), % | 18 to 19 | |
| 0 |
| Phosphorus (P), % | 0 to 0.010 | |
| 0 to 0.025 |
| Silicon (Si), % | 0 to 0.1 | |
| 0 to 0.5 |
| Sulfur (S), % | 0 to 0.010 | |
| 0 to 0.025 |
| Titanium (Ti), % | 0.5 to 0.8 | |
| 0 |
| Zirconium (Zr), % | 0 to 0.020 | |
| 0 |