Annealed 250 Maraging Steel vs. Annealed 300 Maraging Steel
Both annealed 250 maraging steel and annealed 300 maraging steel are iron alloys. Both are furnished in the annealed condition. They have a very high 98% of their average alloy composition in common.
For each property being compared, the top bar is annealed 250 maraging steel and the bottom bar is annealed 300 maraging steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Compressive (Crushing) Strength, MPa | 730 | |
| 730 |
| Elastic (Young's, Tensile) Modulus, GPa | 190 | |
| 190 |
| Elongation at Break, % | 17 | |
| 18 |
| Poisson's Ratio | 0.3 | |
| 0.3 |
| Rockwell C Hardness | 30 | |
| 31 |
| Shear Modulus, GPa | 75 | |
| 75 |
| Shear Strength, MPa | 600 | |
| 640 |
| Tensile Strength: Ultimate (UTS), MPa | 970 | |
| 1030 |
| Tensile Strength: Yield (Proof), MPa | 660 | |
| 760 |
Thermal Properties
| Latent Heat of Fusion, J/g | 270 | |
| 270 |
| Melting Completion (Liquidus), °C | 1480 | |
| 1480 |
| Melting Onset (Solidus), °C | 1430 | |
| 1430 |
| Specific Heat Capacity, J/kg-K | 450 | |
| 450 |
| Thermal Expansion, µm/m-K | 12 | |
| 12 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 32 | |
| 34 |
| Density, g/cm3 | 8.2 | |
| 8.2 |
| Embodied Carbon, kg CO2/kg material | 4.9 | |
| 5.1 |
| Embodied Energy, MJ/kg | 65 | |
| 68 |
| Embodied Water, L/kg | 140 | |
| 150 |
Common Calculations
| PREN (Pitting Resistance) | 16 | |
| 16 |
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 150 | |
| 170 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 1120 | |
| 1490 |
| Stiffness to Weight: Axial, points | 13 | |
| 13 |
| Stiffness to Weight: Bending, points | 23 | |
| 23 |
| Strength to Weight: Axial, points | 33 | |
| 35 |
| Strength to Weight: Bending, points | 26 | |
| 28 |
| Thermal Shock Resistance, points | 29 | |
| 31 |
Alloy Composition
| Aluminum (Al), % | 0.050 to 0.15 | |
| 0.050 to 0.15 |
| Boron (B), % | 0 to 0.0030 | |
| 0 to 0.0030 |
| Calcium (Ca), % | 0 to 0.050 | |
| 0 to 0.050 |
| Carbon (C), % | 0 to 0.030 | |
| 0 to 0.030 |
| Cobalt (Co), % | 7.0 to 8.5 | |
| 8.5 to 9.5 |
| Iron (Fe), % | 66.3 to 71.1 | |
| 65 to 68.4 |
| Manganese (Mn), % | 0 to 0.1 | |
| 0 to 0.1 |
| Molybdenum (Mo), % | 4.6 to 5.2 | |
| 4.6 to 5.2 |
| Nickel (Ni), % | 17 to 19 | |
| 18 to 19 |
| Phosphorus (P), % | 0 to 0.010 | |
| 0 to 0.010 |
| Silicon (Si), % | 0 to 0.1 | |
| 0 to 0.1 |
| Sulfur (S), % | 0 to 0.010 | |
| 0 to 0.010 |
| Titanium (Ti), % | 0.3 to 0.5 | |
| 0.5 to 0.8 |
| Zirconium (Zr), % | 0 to 0.020 | |
| 0 to 0.020 |