Grade 200 Maraging Steel vs. ASTM A387 Grade 21 Steel
Both grade 200 maraging steel and ASTM A387 grade 21 steel are iron alloys. They have 71% of their average alloy composition in common. There are 25 material properties with values for both materials. Properties with values for just one material (9, in this case) are not shown.
For each property being compared, the top bar is grade 200 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, % | 9.1 to 18 | |
| 21 |
| Poisson's Ratio | 0.3 | |
| 0.29 |
| Shear Modulus, GPa | 74 | |
| 74 |
| Shear Strength, MPa | 600 to 890 | |
| 310 to 370 |
| Tensile Strength: Ultimate (UTS), MPa | 970 to 1500 | |
| 500 to 590 |
| Tensile Strength: Yield (Proof), MPa | 690 to 1490 | |
| 230 to 350 |
Thermal Properties
| Latent Heat of Fusion, J/g | 260 | |
| 260 |
| Melting Completion (Liquidus), °C | 1460 | |
| 1470 |
| Melting Onset (Solidus), °C | 1420 | |
| 1430 |
| Specific Heat Capacity, J/kg-K | 460 | |
| 470 |
| Thermal Expansion, µm/m-K | 12 | |
| 13 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 31 | |
| 4.1 |
| Density, g/cm3 | 8.2 | |
| 7.9 |
| Embodied Carbon, kg CO2/kg material | 4.5 | |
| 1.8 |
| Embodied Energy, MJ/kg | 59 | |
| 23 |
| Embodied Water, L/kg | 140 | |
| 62 |
Common Calculations
| PREN (Pitting Resistance) | 11 | |
| 6.4 |
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 140 to 160 | |
| 84 to 110 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 1240 to 5740 | |
| 140 to 320 |
| Stiffness to Weight: Axial, points | 13 | |
| 13 |
| Stiffness to Weight: Bending, points | 23 | |
| 24 |
| Strength to Weight: Axial, points | 33 to 51 | |
| 18 to 21 |
| Strength to Weight: Bending, points | 27 to 35 | |
| 18 to 20 |
| Thermal Shock Resistance, points | 29 to 45 | |
| 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), % | 8.0 to 9.0 | |
| 0 |
| Iron (Fe), % | 67.8 to 71.8 | |
| 94.4 to 96 |
| Manganese (Mn), % | 0 to 0.1 | |
| 0.3 to 0.6 |
| Molybdenum (Mo), % | 3.0 to 3.5 | |
| 0.9 to 1.1 |
| Nickel (Ni), % | 17 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), % | 0.15 to 0.25 | |
| 0 |
| Zirconium (Zr), % | 0 to 0.020 | |
| 0 |