S21904 Stainless Steel vs. EN 1.1191 Steel
Both S21904 stainless steel and EN 1.1191 steel are iron alloys. They have 65% of their average alloy composition in common. There are 31 material properties with values for both materials. Properties with values for just one material (3, in this case) are not shown.
For each property being compared, the top bar is S21904 stainless steel and the bottom bar is EN 1.1191 steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Brinell Hardness | 210 to 300 | |
| 180 to 200 |
| Elastic (Young's, Tensile) Modulus, GPa | 200 | |
| 190 |
| Elongation at Break, % | 17 to 51 | |
| 16 to 17 |
| Fatigue Strength, MPa | 380 to 550 | |
| 210 to 290 |
| Poisson's Ratio | 0.28 | |
| 0.29 |
| Shear Modulus, GPa | 78 | |
| 72 |
| Shear Strength, MPa | 510 to 620 | |
| 380 to 430 |
| Tensile Strength: Ultimate (UTS), MPa | 700 to 1000 | |
| 630 to 700 |
| Tensile Strength: Yield (Proof), MPa | 390 to 910 | |
| 310 to 440 |
Thermal Properties
| Latent Heat of Fusion, J/g | 290 | |
| 250 |
| Maximum Temperature: Mechanical, °C | 980 | |
| 400 |
| Melting Completion (Liquidus), °C | 1400 | |
| 1460 |
| Melting Onset (Solidus), °C | 1350 | |
| 1420 |
| Specific Heat Capacity, J/kg-K | 480 | |
| 470 |
| Thermal Conductivity, W/m-K | 14 | |
| 48 |
| Thermal Expansion, µm/m-K | 17 | |
| 12 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 2.5 | |
| 7.2 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 2.9 | |
| 8.3 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 15 | |
| 2.1 |
| Density, g/cm3 | 7.7 | |
| 7.8 |
| Embodied Carbon, kg CO2/kg material | 3.0 | |
| 1.4 |
| Embodied Energy, MJ/kg | 43 | |
| 19 |
| Embodied Water, L/kg | 160 | |
| 47 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 160 to 310 | |
| 83 to 100 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 380 to 2070 | |
| 260 to 510 |
| Stiffness to Weight: Axial, points | 14 | |
| 13 |
| Stiffness to Weight: Bending, points | 25 | |
| 24 |
| Strength to Weight: Axial, points | 25 to 36 | |
| 22 to 25 |
| Strength to Weight: Bending, points | 23 to 29 | |
| 21 to 22 |
| Thermal Diffusivity, mm2/s | 3.8 | |
| 13 |
| Thermal Shock Resistance, points | 15 to 21 | |
| 20 to 22 |
Alloy Composition
| Carbon (C), % | 0 to 0.040 | |
| 0.42 to 0.5 |
| Chromium (Cr), % | 19 to 21.5 | |
| 0 to 0.4 |
| Iron (Fe), % | 59.5 to 67.4 | |
| 97.3 to 99.08 |
| Manganese (Mn), % | 8.0 to 10 | |
| 0.5 to 0.8 |
| Molybdenum (Mo), % | 0 | |
| 0 to 0.1 |
| Nickel (Ni), % | 5.5 to 7.5 | |
| 0 to 0.4 |
| Nitrogen (N), % | 0.15 to 0.4 | |
| 0 |
| Phosphorus (P), % | 0 to 0.045 | |
| 0 to 0.035 |
| Silicon (Si), % | 0 to 1.0 | |
| 0 to 0.4 |
| Sulfur (S), % | 0 to 0.030 | |
| 0 to 0.035 |