ASTM Grade HN Steel vs. ASTM A387 Grade 12 Steel
Both ASTM grade HN steel and ASTM A387 grade 12 steel are iron alloys. They have 54% of their average alloy composition in common. There are 25 material properties with values for both materials. Properties with values for just one material (8, in this case) are not shown.
For each property being compared, the top bar is ASTM grade HN steel and the bottom bar is ASTM A387 grade 12 steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Brinell Hardness | 140 | |
| 140 to 160 |
| Elastic (Young's, Tensile) Modulus, GPa | 200 | |
| 190 |
| Elongation at Break, % | 9.0 | |
| 25 |
| Poisson's Ratio | 0.28 | |
| 0.29 |
| Shear Modulus, GPa | 77 | |
| 73 |
| Tensile Strength: Ultimate (UTS), MPa | 500 | |
| 470 to 520 |
Thermal Properties
| Latent Heat of Fusion, J/g | 310 | |
| 250 |
| Maximum Temperature: Mechanical, °C | 1080 | |
| 430 |
| Melting Completion (Liquidus), °C | 1400 | |
| 1470 |
| Melting Onset (Solidus), °C | 1350 | |
| 1420 |
| Specific Heat Capacity, J/kg-K | 480 | |
| 470 |
| Thermal Conductivity, W/m-K | 13 | |
| 44 |
| Thermal Expansion, µm/m-K | 16 | |
| 13 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 26 | |
| 2.8 |
| Density, g/cm3 | 7.9 | |
| 7.8 |
| Embodied Carbon, kg CO2/kg material | 4.6 | |
| 1.6 |
| Embodied Energy, MJ/kg | 66 | |
| 21 |
| Embodied Water, L/kg | 180 | |
| 51 |
Common Calculations
| PREN (Pitting Resistance) | 22 | |
| 2.7 |
| Stiffness to Weight: Axial, points | 14 | |
| 13 |
| Stiffness to Weight: Bending, points | 25 | |
| 24 |
| Strength to Weight: Axial, points | 17 | |
| 16 to 18 |
| Strength to Weight: Bending, points | 18 | |
| 17 to 18 |
| Thermal Diffusivity, mm2/s | 3.5 | |
| 12 |
| Thermal Shock Resistance, points | 11 | |
| 14 to 15 |
Alloy Composition
| Carbon (C), % | 0.2 to 0.5 | |
| 0.050 to 0.17 |
| Chromium (Cr), % | 19 to 23 | |
| 0.8 to 1.2 |
| Iron (Fe), % | 44.9 to 57.8 | |
| 97 to 98.2 |
| Manganese (Mn), % | 0 to 2.0 | |
| 0.4 to 0.65 |
| Molybdenum (Mo), % | 0 to 0.5 | |
| 0.45 to 0.6 |
| Nickel (Ni), % | 23 to 27 | |
| 0 |
| Phosphorus (P), % | 0 to 0.040 | |
| 0 to 0.025 |
| Silicon (Si), % | 0 to 2.0 | |
| 0.15 to 0.4 |
| Sulfur (S), % | 0 to 0.040 | |
| 0 to 0.025 |