AISI 303 Stainless Steel vs. ASTM Grade HP Steel
Both AISI 303 stainless steel and ASTM grade HP steel are iron alloys. They have 65% of their average alloy composition in common. There are 30 material properties with values for both materials. Properties with values for just one material (4, in this case) are not shown.
For each property being compared, the top bar is AISI 303 stainless steel and the bottom bar is ASTM grade HP steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Brinell Hardness | 170 to 210 | |
| 140 |
| Elastic (Young's, Tensile) Modulus, GPa | 200 | |
| 200 |
| Elongation at Break, % | 40 to 51 | |
| 5.1 |
| Fatigue Strength, MPa | 230 to 360 | |
| 130 |
| Poisson's Ratio | 0.28 | |
| 0.28 |
| Shear Modulus, GPa | 77 | |
| 78 |
| Tensile Strength: Ultimate (UTS), MPa | 600 to 690 | |
| 490 |
| Tensile Strength: Yield (Proof), MPa | 230 to 420 | |
| 260 |
Thermal Properties
| Latent Heat of Fusion, J/g | 290 | |
| 320 |
| Maximum Temperature: Corrosion, °C | 410 | |
| 440 |
| Maximum Temperature: Mechanical, °C | 930 | |
| 1100 |
| Melting Completion (Liquidus), °C | 1450 | |
| 1370 |
| Melting Onset (Solidus), °C | 1400 | |
| 1330 |
| Specific Heat Capacity, J/kg-K | 480 | |
| 480 |
| Thermal Conductivity, W/m-K | 16 | |
| 12 |
| Thermal Expansion, µm/m-K | 17 | |
| 16 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 15 | |
| 34 |
| Density, g/cm3 | 7.8 | |
| 7.9 |
| Embodied Carbon, kg CO2/kg material | 3.0 | |
| 5.8 |
| Embodied Energy, MJ/kg | 42 | |
| 82 |
| Embodied Water, L/kg | 140 | |
| 220 |
Common Calculations
| PREN (Pitting Resistance) | 18 | |
| 27 |
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 240 | |
| 21 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 140 to 440 | |
| 170 |
| Stiffness to Weight: Axial, points | 14 | |
| 14 |
| Stiffness to Weight: Bending, points | 25 | |
| 25 |
| Strength to Weight: Axial, points | 21 to 25 | |
| 17 |
| Strength to Weight: Bending, points | 20 to 22 | |
| 17 |
| Thermal Diffusivity, mm2/s | 4.4 | |
| 3.2 |
| Thermal Shock Resistance, points | 13 to 15 | |
| 11 |
Alloy Composition
| Carbon (C), % | 0 to 0.15 | |
| 0.35 to 0.75 |
| Chromium (Cr), % | 17 to 19 | |
| 24 to 28 |
| Iron (Fe), % | 67.3 to 74.9 | |
| 29.2 to 42.7 |
| Manganese (Mn), % | 0 to 2.0 | |
| 0 to 2.0 |
| Molybdenum (Mo), % | 0 | |
| 0 to 0.5 |
| Nickel (Ni), % | 8.0 to 10 | |
| 33 to 37 |
| Phosphorus (P), % | 0 to 0.2 | |
| 0 to 0.040 |
| Silicon (Si), % | 0 to 1.0 | |
| 0 to 2.5 |
| Sulfur (S), % | 0.15 to 0.35 | |
| 0 to 0.040 |