ASTM A372 Grade M Steel vs. Grade 300 Maraging Steel
Both ASTM A372 grade M steel and grade 300 maraging steel are iron alloys. They have 71% of their average alloy composition in common. There are 24 material properties with values for both materials. Properties with values for just one material (10, in this case) are not shown.
For each property being compared, the top bar is ASTM A372 grade M steel and the bottom bar is grade 300 maraging steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 190 | |
| 190 |
| Elongation at Break, % | 18 to 21 | |
| 6.5 to 18 |
| Poisson's Ratio | 0.29 | |
| 0.3 |
| Shear Modulus, GPa | 73 | |
| 75 |
| Shear Strength, MPa | 510 to 570 | |
| 640 to 1190 |
| Tensile Strength: Ultimate (UTS), MPa | 810 to 910 | |
| 1030 to 2030 |
| Tensile Strength: Yield (Proof), MPa | 660 to 770 | |
| 760 to 1990 |
Thermal Properties
| Latent Heat of Fusion, J/g | 250 | |
| 270 |
| Melting Completion (Liquidus), °C | 1460 | |
| 1480 |
| Melting Onset (Solidus), °C | 1420 | |
| 1430 |
| Specific Heat Capacity, J/kg-K | 470 | |
| 450 |
| Thermal Expansion, µm/m-K | 13 | |
| 12 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 5.0 | |
| 34 |
| Density, g/cm3 | 7.9 | |
| 8.2 |
| Embodied Carbon, kg CO2/kg material | 2.0 | |
| 5.1 |
| Embodied Energy, MJ/kg | 27 | |
| 68 |
| Embodied Water, L/kg | 61 | |
| 150 |
Common Calculations
| PREN (Pitting Resistance) | 3.4 | |
| 16 |
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 160 | |
| 130 to 170 |
| Stiffness to Weight: Axial, points | 13 | |
| 13 |
| Stiffness to Weight: Bending, points | 24 | |
| 23 |
| Strength to Weight: Axial, points | 29 to 32 | |
| 35 to 68 |
| Strength to Weight: Bending, points | 24 to 27 | |
| 28 to 43 |
| Thermal Shock Resistance, points | 24 to 27 | |
| 31 to 62 |
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 to 0.23 | |
| 0 to 0.030 |
| Chromium (Cr), % | 1.5 to 2.0 | |
| 0 |
| Cobalt (Co), % | 0 | |
| 8.5 to 9.5 |
| Iron (Fe), % | 92.5 to 95.1 | |
| 65 to 68.4 |
| Manganese (Mn), % | 0.2 to 0.4 | |
| 0 to 0.1 |
| Molybdenum (Mo), % | 0.4 to 0.6 | |
| 4.6 to 5.2 |
| Nickel (Ni), % | 2.8 to 3.9 | |
| 18 to 19 |
| Phosphorus (P), % | 0 to 0.015 | |
| 0 to 0.010 |
| Silicon (Si), % | 0 to 0.3 | |
| 0 to 0.1 |
| Sulfur (S), % | 0 to 0.010 | |
| 0 to 0.010 |
| Titanium (Ti), % | 0 | |
| 0.5 to 0.8 |
| Vanadium (V), % | 0 to 0.080 | |
| 0 |
| Zirconium (Zr), % | 0 | |
| 0 to 0.020 |