Grade 300 Maraging Steel vs. Grade 350 Maraging Steel
Both grade 300 maraging steel and grade 350 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 300 maraging steel and the bottom bar is grade 350 maraging steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Compressive (Crushing) Strength, MPa | 730 to 1880 | |
| 750 to 2400 |
| Elastic (Young's, Tensile) Modulus, GPa | 190 | |
| 190 |
| Elongation at Break, % | 6.5 to 18 | |
| 4.1 to 18 |
| Poisson's Ratio | 0.3 | |
| 0.3 |
| Rockwell C Hardness | 31 to 56 | |
| 34 to 60 |
| Shear Modulus, GPa | 75 | |
| 75 |
| Shear Strength, MPa | 640 to 1190 | |
| 710 to 1400 |
| Tensile Strength: Ultimate (UTS), MPa | 1030 to 2030 | |
| 1140 to 2420 |
| Tensile Strength: Yield (Proof), MPa | 760 to 1990 | |
| 830 to 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 to 170 | |
| 98 to 190 |
| Stiffness to Weight: Axial, points | 13 | |
| 13 |
| Stiffness to Weight: Bending, points | 23 | |
| 23 |
| Strength to Weight: Axial, points | 35 to 68 | |
| 38 to 82 |
| Strength to Weight: Bending, points | 28 to 43 | |
| 29 to 49 |
| Thermal Shock Resistance, points | 31 to 62 | |
| 35 to 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 |