ASTM Grade HP Steel vs. AISI 304L Stainless Steel
Both ASTM grade HP steel and AISI 304L stainless steel are iron alloys. They have 66% of their average alloy composition in common. There are 30 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 ASTM grade HP steel and the bottom bar is AISI 304L stainless steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Brinell Hardness | 140 | |
| 160 to 350 |
| Elastic (Young's, Tensile) Modulus, GPa | 200 | |
| 200 |
| Elongation at Break, % | 5.1 | |
| 6.7 to 46 |
| Fatigue Strength, MPa | 130 | |
| 170 to 430 |
| Poisson's Ratio | 0.28 | |
| 0.28 |
| Shear Modulus, GPa | 78 | |
| 77 |
| Tensile Strength: Ultimate (UTS), MPa | 490 | |
| 540 to 1160 |
| Tensile Strength: Yield (Proof), MPa | 260 | |
| 190 to 870 |
Thermal Properties
| Latent Heat of Fusion, J/g | 320 | |
| 290 |
| Maximum Temperature: Corrosion, °C | 440 | |
| 420 |
| Maximum Temperature: Mechanical, °C | 1100 | |
| 540 |
| Melting Completion (Liquidus), °C | 1370 | |
| 1450 |
| Melting Onset (Solidus), °C | 1330 | |
| 1400 |
| Specific Heat Capacity, J/kg-K | 480 | |
| 480 |
| Thermal Conductivity, W/m-K | 12 | |
| 16 |
| Thermal Expansion, µm/m-K | 16 | |
| 17 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 34 | |
| 16 |
| Density, g/cm3 | 7.9 | |
| 7.8 |
| Embodied Carbon, kg CO2/kg material | 5.8 | |
| 3.1 |
| Embodied Energy, MJ/kg | 82 | |
| 44 |
| Embodied Water, L/kg | 220 | |
| 150 |
Common Calculations
| PREN (Pitting Resistance) | 27 | |
| 20 |
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 21 | |
| 71 to 240 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 170 | |
| 92 to 1900 |
| Stiffness to Weight: Axial, points | 14 | |
| 14 |
| Stiffness to Weight: Bending, points | 25 | |
| 25 |
| Strength to Weight: Axial, points | 17 | |
| 19 to 41 |
| Strength to Weight: Bending, points | 17 | |
| 19 to 31 |
| Thermal Diffusivity, mm2/s | 3.2 | |
| 4.2 |
| Thermal Shock Resistance, points | 11 | |
| 12 to 25 |
Alloy Composition
| Carbon (C), % | 0.35 to 0.75 | |
| 0 to 0.030 |
| Chromium (Cr), % | 24 to 28 | |
| 18 to 20 |
| Iron (Fe), % | 29.2 to 42.7 | |
| 65 to 74 |
| Manganese (Mn), % | 0 to 2.0 | |
| 0 to 2.0 |
| Molybdenum (Mo), % | 0 to 0.5 | |
| 0 |
| Nickel (Ni), % | 33 to 37 | |
| 8.0 to 12 |
| Nitrogen (N), % | 0 | |
| 0 to 0.1 |
| Phosphorus (P), % | 0 to 0.040 | |
| 0 to 0.045 |
| Silicon (Si), % | 0 to 2.5 | |
| 0 to 0.75 |
| Sulfur (S), % | 0 to 0.040 | |
| 0 to 0.030 |