EN 1.3551 Steel vs. S81921 Stainless Steel
Both EN 1.3551 steel and S81921 stainless steel are iron alloys. They have 77% of their average alloy composition in common. There are 26 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 EN 1.3551 steel and the bottom bar is S81921 stainless steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Brinell Hardness | 220 | |
| 260 |
| Elastic (Young's, Tensile) Modulus, GPa | 190 | |
| 200 |
| Poisson's Ratio | 0.29 | |
| 0.28 |
| Shear Modulus, GPa | 75 | |
| 79 |
| Tensile Strength: Ultimate (UTS), MPa | 720 | |
| 710 |
Thermal Properties
| Latent Heat of Fusion, J/g | 260 | |
| 290 |
| Maximum Temperature: Mechanical, °C | 530 | |
| 990 |
| Melting Completion (Liquidus), °C | 1490 | |
| 1430 |
| Melting Onset (Solidus), °C | 1450 | |
| 1390 |
| Specific Heat Capacity, J/kg-K | 460 | |
| 480 |
| Thermal Conductivity, W/m-K | 36 | |
| 15 |
| Thermal Expansion, µm/m-K | 13 | |
| 13 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 8.6 | |
| 2.2 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 9.9 | |
| 2.5 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 9.0 | |
| 14 |
| Density, g/cm3 | 7.9 | |
| 7.7 |
| Embodied Carbon, kg CO2/kg material | 4.9 | |
| 2.9 |
| Embodied Energy, MJ/kg | 71 | |
| 41 |
| Embodied Water, L/kg | 82 | |
| 150 |
Common Calculations
| PREN (Pitting Resistance) | 18 | |
| 28 |
| Stiffness to Weight: Axial, points | 14 | |
| 14 |
| Stiffness to Weight: Bending, points | 24 | |
| 25 |
| Strength to Weight: Axial, points | 26 | |
| 25 |
| Strength to Weight: Bending, points | 23 | |
| 23 |
| Thermal Diffusivity, mm2/s | 9.8 | |
| 4.0 |
| Thermal Shock Resistance, points | 21 | |
| 20 |
Alloy Composition
| Carbon (C), % | 0.77 to 0.85 | |
| 0 to 0.030 |
| Chromium (Cr), % | 3.9 to 4.3 | |
| 19 to 22 |
| Copper (Cu), % | 0 to 0.3 | |
| 0 |
| Iron (Fe), % | 88.8 to 91.1 | |
| 66.7 to 75.9 |
| Manganese (Mn), % | 0.15 to 0.35 | |
| 2.0 to 4.0 |
| Molybdenum (Mo), % | 4.0 to 4.5 | |
| 1.0 to 2.0 |
| Nickel (Ni), % | 0 | |
| 2.0 to 4.0 |
| Nitrogen (N), % | 0 | |
| 0.14 to 0.2 |
| Phosphorus (P), % | 0 to 0.025 | |
| 0 to 0.040 |
| Silicon (Si), % | 0 to 0.4 | |
| 0 to 1.0 |
| Sulfur (S), % | 0 to 0.015 | |
| 0 to 0.030 |
| Tungsten (W), % | 0 to 0.25 | |
| 0 |
| Vanadium (V), % | 0.9 to 1.1 | |
| 0 |