Aged 300 Maraging Steel vs. Aged 350 Maraging Steel
Both aged 300 maraging steel and aged 350 maraging steel are iron alloys. Both are furnished in the aged (precipitation hardened) condition. They have a very high 96% of their average alloy composition in common.
For each property being compared, the top bar is aged 300 maraging steel and the bottom bar is aged 350 maraging steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Compressive (Crushing) Strength, MPa | 1880 | |
| 2400 |
| Elastic (Young's, Tensile) Modulus, GPa | 190 | |
| 190 |
| Elongation at Break, % | 6.5 | |
| 4.1 |
| Fatigue Strength, MPa | 860 | |
| 760 |
| Fracture Toughness, MPa-m1/2 | 77 | |
| 38 |
| Impact Strength: V-Notched Charpy, J | 18 | |
| 9.6 |
| Poisson's Ratio | 0.3 | |
| 0.3 |
| Rockwell C Hardness | 56 | |
| 60 |
| Shear Modulus, GPa | 75 | |
| 75 |
| Shear Strength, MPa | 1190 | |
| 1400 |
| Tensile Strength: Ultimate (UTS), MPa | 2030 | |
| 2420 |
| Tensile Strength: Yield (Proof), MPa | 1990 | |
| 2300 |
Thermal Properties
| Latent Heat of Fusion, J/g | 270 | |
| 270 |
| Melting Completion (Liquidus), °C | 1480 | |
| 1470 |
| Melting Onset (Solidus), °C | 1430 | |
| 1420 |
| Specific Heat Capacity, J/kg-K | 450 | |
| 450 |
| Thermal Expansion, µm/m-K | 12 | |
| 12 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 34 | |
| 39 |
| Density, g/cm3 | 8.2 | |
| 8.2 |
| Embodied Carbon, kg CO2/kg material | 5.1 | |
| 5.6 |
| Embodied Energy, MJ/kg | 68 | |
| 74 |
| Embodied Water, L/kg | 150 | |
| 160 |
Common Calculations
| PREN (Pitting Resistance) | 16 | |
| 16 |
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 130 | |
| 98 |
| Stiffness to Weight: Axial, points | 13 | |
| 13 |
| Stiffness to Weight: Bending, points | 23 | |
| 23 |
| Strength to Weight: Axial, points | 68 | |
| 82 |
| Strength to Weight: Bending, points | 43 | |
| 49 |
| Thermal Shock Resistance, points | 62 | |
| 74 |
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 | |
| 11.5 to 12.5 |
| Iron (Fe), % | 65 to 68.4 | |
| 61.2 to 64.6 |
| 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 | |
| 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), % | 0.5 to 0.8 | |
| 1.3 to 1.6 |
| Zirconium (Zr), % | 0 to 0.020 | |
| 0 to 0.020 |