ASTM Grade HI Steel vs. Grade 300 Maraging Steel
Both ASTM grade HI steel and grade 300 maraging steel are iron alloys. They have 70% of their average alloy composition in common. There are 23 material properties with values for both materials. Properties with values for just one material (12, in this case) are not shown.
For each property being compared, the top bar is ASTM grade HI steel and the bottom bar is grade 300 maraging steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 200 | |
| 190 |
| Elongation at Break, % | 11 | |
| 6.5 to 18 |
| Poisson's Ratio | 0.27 | |
| 0.3 |
| Shear Modulus, GPa | 79 | |
| 75 |
| Tensile Strength: Ultimate (UTS), MPa | 550 | |
| 1030 to 2030 |
| Tensile Strength: Yield (Proof), MPa | 270 | |
| 760 to 1990 |
Thermal Properties
| Latent Heat of Fusion, J/g | 310 | |
| 270 |
| Melting Completion (Liquidus), °C | 1400 | |
| 1480 |
| Melting Onset (Solidus), °C | 1350 | |
| 1430 |
| Specific Heat Capacity, J/kg-K | 490 | |
| 450 |
| Thermal Expansion, µm/m-K | 17 | |
| 12 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 23 | |
| 34 |
| Density, g/cm3 | 7.8 | |
| 8.2 |
| Embodied Carbon, kg CO2/kg material | 4.1 | |
| 5.1 |
| Embodied Energy, MJ/kg | 59 | |
| 68 |
| Embodied Water, L/kg | 200 | |
| 150 |
Common Calculations
| PREN (Pitting Resistance) | 29 | |
| 16 |
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 52 | |
| 130 to 170 |
| Stiffness to Weight: Axial, points | 14 | |
| 13 |
| Stiffness to Weight: Bending, points | 25 | |
| 23 |
| Strength to Weight: Axial, points | 20 | |
| 35 to 68 |
| Strength to Weight: Bending, points | 19 | |
| 28 to 43 |
| Thermal Shock Resistance, points | 12 | |
| 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), % | 0.2 to 0.5 | |
| 0 to 0.030 |
| Chromium (Cr), % | 26 to 30 | |
| 0 |
| Cobalt (Co), % | 0 | |
| 8.5 to 9.5 |
| Iron (Fe), % | 46.9 to 59.8 | |
| 65 to 68.4 |
| Manganese (Mn), % | 0 to 2.0 | |
| 0 to 0.1 |
| Molybdenum (Mo), % | 0 to 0.5 | |
| 4.6 to 5.2 |
| Nickel (Ni), % | 14 to 18 | |
| 18 to 19 |
| Phosphorus (P), % | 0 to 0.040 | |
| 0 to 0.010 |
| Silicon (Si), % | 0 to 2.0 | |
| 0 to 0.1 |
| Sulfur (S), % | 0 to 0.040 | |
| 0 to 0.010 |
| Titanium (Ti), % | 0 | |
| 0.5 to 0.8 |
| Zirconium (Zr), % | 0 | |
| 0 to 0.020 |