S31277 Stainless Steel vs. SAE-AISI 9255 Steel
Both S31277 stainless steel and SAE-AISI 9255 steel are iron alloys. Both are furnished in the annealed condition. They have 42% of their average alloy composition in common. There are 26 material properties with values for both materials. Properties with values for just one material (7, in this case) are not shown.
For each property being compared, the top bar is S31277 stainless steel and the bottom bar is SAE-AISI 9255 steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 210 | |
| 190 |
| Elongation at Break, % | 45 | |
| 21 |
| Fatigue Strength, MPa | 380 | |
| 270 |
| Poisson's Ratio | 0.28 | |
| 0.29 |
| Shear Modulus, GPa | 80 | |
| 72 |
| Shear Strength, MPa | 600 | |
| 430 |
| Tensile Strength: Ultimate (UTS), MPa | 860 | |
| 680 |
| Tensile Strength: Yield (Proof), MPa | 410 | |
| 390 |
Thermal Properties
| Latent Heat of Fusion, J/g | 310 | |
| 280 |
| Maximum Temperature: Mechanical, °C | 1100 | |
| 400 |
| Melting Completion (Liquidus), °C | 1460 | |
| 1430 |
| Melting Onset (Solidus), °C | 1410 | |
| 1390 |
| Specific Heat Capacity, J/kg-K | 460 | |
| 480 |
| Thermal Expansion, µm/m-K | 16 | |
| 13 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 36 | |
| 2.0 |
| Density, g/cm3 | 8.1 | |
| 7.7 |
| Embodied Carbon, kg CO2/kg material | 6.7 | |
| 1.5 |
| Embodied Energy, MJ/kg | 90 | |
| 20 |
| Embodied Water, L/kg | 220 | |
| 46 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 320 | |
| 120 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 410 | |
| 400 |
| Stiffness to Weight: Axial, points | 14 | |
| 13 |
| Stiffness to Weight: Bending, points | 24 | |
| 25 |
| Strength to Weight: Axial, points | 29 | |
| 24 |
| Strength to Weight: Bending, points | 25 | |
| 22 |
| Thermal Shock Resistance, points | 19 | |
| 21 |
Alloy Composition
| Carbon (C), % | 0 to 0.020 | |
| 0.51 to 0.59 |
| Chromium (Cr), % | 20.5 to 23 | |
| 0 |
| Copper (Cu), % | 0.5 to 1.5 | |
| 0 |
| Iron (Fe), % | 35.5 to 46.2 | |
| 96.2 to 97 |
| Manganese (Mn), % | 0 to 3.0 | |
| 0.7 to 1.0 |
| Molybdenum (Mo), % | 6.5 to 8.0 | |
| 0 |
| Nickel (Ni), % | 26 to 28 | |
| 0 |
| Nitrogen (N), % | 0.3 to 0.4 | |
| 0 |
| Phosphorus (P), % | 0 to 0.030 | |
| 0 to 0.035 |
| Silicon (Si), % | 0 to 0.5 | |
| 1.8 to 2.2 |
| Sulfur (S), % | 0 to 0.010 | |
| 0 to 0.040 |