Grade 300 Maraging Steel vs. Grade 250 Maraging Steel
Both grade 300 maraging steel and grade 250 maraging steel are iron alloys. They have a very high 98% of their average alloy composition in common.
For each property being compared, the top bar is grade 300 maraging steel and the bottom bar is grade 250 maraging steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Compressive (Crushing) Strength, MPa | 730 to 1880 | |
| 730 to 1660 |
| Elastic (Young's, Tensile) Modulus, GPa | 190 | |
| 190 |
| Elongation at Break, % | 6.5 to 18 | |
| 7.3 to 17 |
| Poisson's Ratio | 0.3 | |
| 0.3 |
| Rockwell C Hardness | 31 to 56 | |
| 30 to 53 |
| Shear Modulus, GPa | 75 | |
| 75 |
| Shear Strength, MPa | 640 to 1190 | |
| 600 to 1060 |
| Tensile Strength: Ultimate (UTS), MPa | 1030 to 2030 | |
| 970 to 1800 |
| Tensile Strength: Yield (Proof), MPa | 760 to 1990 | |
| 660 to 1740 |
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 | 34 | |
| 32 |
| Density, g/cm3 | 8.2 | |
| 8.2 |
| Embodied Carbon, kg CO2/kg material | 5.1 | |
| 4.9 |
| Embodied Energy, MJ/kg | 68 | |
| 65 |
| Embodied Water, L/kg | 150 | |
| 140 |
Common Calculations
| PREN (Pitting Resistance) | 16 | |
| 16 |
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 130 to 170 | |
| 130 to 150 |
| Stiffness to Weight: Axial, points | 13 | |
| 13 |
| Stiffness to Weight: Bending, points | 23 | |
| 23 |
| Strength to Weight: Axial, points | 35 to 68 | |
| 33 to 61 |
| Strength to Weight: Bending, points | 28 to 43 | |
| 26 to 40 |
| Thermal Shock Resistance, points | 31 to 62 | |
| 29 to 54 |
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), % | 8.5 to 9.5 | |
| 7.0 to 8.5 |
| Iron (Fe), % | 65 to 68.4 | |
| 66.3 to 71.1 |
| Manganese (Mn), % | 0 to 0.1 | |
| 0 to 0.1 |
| Molybdenum (Mo), % | 4.6 to 5.2 | |
| 4.6 to 5.2 |
| Nickel (Ni), % | 18 to 19 | |
| 17 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), % | 0.5 to 0.8 | |
| 0.3 to 0.5 |
| Zirconium (Zr), % | 0 to 0.020 | |
| 0 to 0.020 |