Grade 350 Maraging Steel vs. Grade 300 Maraging Steel
Both grade 350 maraging steel and grade 300 maraging steel are iron alloys. They have a very high 96% of their average alloy composition in common.
For each property being compared, the top bar is grade 350 maraging steel and the bottom bar is grade 300 maraging steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Compressive (Crushing) Strength, MPa | 750 to 2400 | |
| 730 to 1880 |
| Elastic (Young's, Tensile) Modulus, GPa | 190 | |
| 190 |
| Elongation at Break, % | 4.1 to 18 | |
| 6.5 to 18 |
| Poisson's Ratio | 0.3 | |
| 0.3 |
| Rockwell C Hardness | 34 to 60 | |
| 31 to 56 |
| Shear Modulus, GPa | 75 | |
| 75 |
| Shear Strength, MPa | 710 to 1400 | |
| 640 to 1190 |
| Tensile Strength: Ultimate (UTS), MPa | 1140 to 2420 | |
| 1030 to 2030 |
| Tensile Strength: Yield (Proof), MPa | 830 to 2300 | |
| 760 to 1990 |
Thermal Properties
| Latent Heat of Fusion, J/g | 270 | |
| 270 |
| Melting Completion (Liquidus), °C | 1470 | |
| 1480 |
| Melting Onset (Solidus), °C | 1420 | |
| 1430 |
| Specific Heat Capacity, J/kg-K | 450 | |
| 450 |
| Thermal Expansion, µm/m-K | 12 | |
| 12 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 39 | |
| 34 |
| Density, g/cm3 | 8.2 | |
| 8.2 |
| Embodied Carbon, kg CO2/kg material | 5.6 | |
| 5.1 |
| Embodied Energy, MJ/kg | 74 | |
| 68 |
| Embodied Water, L/kg | 160 | |
| 150 |
Common Calculations
| PREN (Pitting Resistance) | 16 | |
| 16 |
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 98 to 190 | |
| 130 to 170 |
| Stiffness to Weight: Axial, points | 13 | |
| 13 |
| Stiffness to Weight: Bending, points | 23 | |
| 23 |
| Strength to Weight: Axial, points | 38 to 82 | |
| 35 to 68 |
| Strength to Weight: Bending, points | 29 to 49 | |
| 28 to 43 |
| Thermal Shock Resistance, points | 35 to 74 | |
| 31 to 62 |
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), % | 11.5 to 12.5 | |
| 8.5 to 9.5 |
| Iron (Fe), % | 61.2 to 64.6 | |
| 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), % | 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), % | 1.3 to 1.6 | |
| 0.5 to 0.8 |
| Zirconium (Zr), % | 0 to 0.020 | |
| 0 to 0.020 |