SAE-AISI 4340M Steel vs. Grade 350 Maraging Steel
Both SAE-AISI 4340M steel and grade 350 maraging steel are iron alloys. They have 65% of their average alloy composition in common. There are 25 material properties with values for both materials. Properties with values for just one material (11, in this case) are not shown.
For each property being compared, the top bar is SAE-AISI 4340M steel and the bottom bar is grade 350 maraging steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 190 | |
| 190 |
| Elongation at Break, % | 6.0 | |
| 4.1 to 18 |
| Poisson's Ratio | 0.29 | |
| 0.3 |
| Rockwell C Hardness | 55 | |
| 34 to 60 |
| Shear Modulus, GPa | 72 | |
| 75 |
| Shear Strength, MPa | 1360 | |
| 710 to 1400 |
| Tensile Strength: Ultimate (UTS), MPa | 2340 | |
| 1140 to 2420 |
| Tensile Strength: Yield (Proof), MPa | 1240 | |
| 830 to 2300 |
Thermal Properties
| Latent Heat of Fusion, J/g | 280 | |
| 270 |
| Melting Completion (Liquidus), °C | 1440 | |
| 1470 |
| Melting Onset (Solidus), °C | 1400 | |
| 1420 |
| Specific Heat Capacity, J/kg-K | 480 | |
| 450 |
| Thermal Expansion, µm/m-K | 13 | |
| 12 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 3.9 | |
| 39 |
| Density, g/cm3 | 7.8 | |
| 8.2 |
| Embodied Carbon, kg CO2/kg material | 1.9 | |
| 5.6 |
| Embodied Energy, MJ/kg | 26 | |
| 74 |
| Embodied Water, L/kg | 55 | |
| 160 |
Common Calculations
| PREN (Pitting Resistance) | 2.2 | |
| 16 |
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 120 | |
| 98 to 190 |
| Stiffness to Weight: Axial, points | 13 | |
| 13 |
| Stiffness to Weight: Bending, points | 25 | |
| 23 |
| Strength to Weight: Axial, points | 84 | |
| 38 to 82 |
| Strength to Weight: Bending, points | 51 | |
| 29 to 49 |
| Thermal Shock Resistance, points | 70 | |
| 35 to 74 |
Alloy Composition
| Aluminum (Al), % | 0 | |
| 0.050 to 0.15 |
| Boron (B), % | 0 | |
| 0 to 0.0030 |
| Calcium (Ca), % | 0 | |
| 0 to 0.050 |
| Carbon (C), % | 0.38 to 0.43 | |
| 0 to 0.030 |
| Chromium (Cr), % | 0.7 to 1.0 | |
| 0 |
| Cobalt (Co), % | 0 | |
| 11.5 to 12.5 |
| Iron (Fe), % | 93.3 to 94.8 | |
| 61.2 to 64.6 |
| Manganese (Mn), % | 0.65 to 0.9 | |
| 0 to 0.1 |
| Molybdenum (Mo), % | 0.35 to 0.45 | |
| 4.6 to 5.2 |
| Nickel (Ni), % | 1.7 to 2.0 | |
| 18 to 19 |
| Phosphorus (P), % | 0 to 0.012 | |
| 0 to 0.010 |
| Silicon (Si), % | 1.5 to 1.8 | |
| 0 to 0.1 |
| Sulfur (S), % | 0 to 0.012 | |
| 0 to 0.010 |
| Titanium (Ti), % | 0 | |
| 1.3 to 1.6 |
| Vanadium (V), % | 0.050 to 0.1 | |
| 0 |
| Zirconium (Zr), % | 0 | |
| 0 to 0.020 |