SAE-AISI 5140 Steel vs. ASTM Grade HP Steel
Both SAE-AISI 5140 steel and ASTM grade HP steel are iron alloys. They have a modest 38% of their average alloy composition in common, which, by itself, doesn't mean much. There are 28 material properties with values for both materials. Properties with values for just one material (5, in this case) are not shown.
For each property being compared, the top bar is SAE-AISI 5140 steel and the bottom bar is ASTM grade HP steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Brinell Hardness | 170 to 290 | |
| 140 |
| Elastic (Young's, Tensile) Modulus, GPa | 190 | |
| 200 |
| Elongation at Break, % | 12 to 29 | |
| 5.1 |
| Fatigue Strength, MPa | 220 to 570 | |
| 130 |
| Poisson's Ratio | 0.29 | |
| 0.28 |
| Shear Modulus, GPa | 73 | |
| 78 |
| Tensile Strength: Ultimate (UTS), MPa | 560 to 970 | |
| 490 |
| Tensile Strength: Yield (Proof), MPa | 290 to 840 | |
| 260 |
Thermal Properties
| Latent Heat of Fusion, J/g | 250 | |
| 320 |
| Maximum Temperature: Mechanical, °C | 420 | |
| 1100 |
| Melting Completion (Liquidus), °C | 1460 | |
| 1370 |
| Melting Onset (Solidus), °C | 1420 | |
| 1330 |
| Specific Heat Capacity, J/kg-K | 470 | |
| 480 |
| Thermal Conductivity, W/m-K | 45 | |
| 12 |
| Thermal Expansion, µm/m-K | 13 | |
| 16 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 2.1 | |
| 34 |
| Density, g/cm3 | 7.8 | |
| 7.9 |
| Embodied Carbon, kg CO2/kg material | 1.4 | |
| 5.8 |
| Embodied Energy, MJ/kg | 19 | |
| 82 |
| Embodied Water, L/kg | 49 | |
| 220 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 76 to 180 | |
| 21 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 220 to 1880 | |
| 170 |
| Stiffness to Weight: Axial, points | 13 | |
| 14 |
| Stiffness to Weight: Bending, points | 24 | |
| 25 |
| Strength to Weight: Axial, points | 20 to 34 | |
| 17 |
| Strength to Weight: Bending, points | 19 to 28 | |
| 17 |
| Thermal Diffusivity, mm2/s | 12 | |
| 3.2 |
| Thermal Shock Resistance, points | 16 to 29 | |
| 11 |
Alloy Composition
| Carbon (C), % | 0.38 to 0.43 | |
| 0.35 to 0.75 |
| Chromium (Cr), % | 0.7 to 0.9 | |
| 24 to 28 |
| Iron (Fe), % | 97.3 to 98.1 | |
| 29.2 to 42.7 |
| Manganese (Mn), % | 0.7 to 0.9 | |
| 0 to 2.0 |
| Molybdenum (Mo), % | 0 | |
| 0 to 0.5 |
| Nickel (Ni), % | 0 | |
| 33 to 37 |
| Phosphorus (P), % | 0 to 0.035 | |
| 0 to 0.040 |
| Silicon (Si), % | 0.15 to 0.35 | |
| 0 to 2.5 |
| Sulfur (S), % | 0 to 0.040 | |
| 0 to 0.040 |