S21904 Stainless Steel vs. EN 1.4945 Stainless Steel
Both S21904 stainless steel and EN 1.4945 stainless steel are iron alloys. They have 86% of their average alloy composition in common.
For each property being compared, the top bar is S21904 stainless steel and the bottom bar is EN 1.4945 stainless steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Brinell Hardness | 210 to 300 | |
| 200 to 220 |
| Elastic (Young's, Tensile) Modulus, GPa | 200 | |
| 200 |
| Elongation at Break, % | 17 to 51 | |
| 19 to 34 |
| Fatigue Strength, MPa | 380 to 550 | |
| 230 to 350 |
| Poisson's Ratio | 0.28 | |
| 0.28 |
| Shear Modulus, GPa | 78 | |
| 77 |
| Shear Strength, MPa | 510 to 620 | |
| 430 to 460 |
| Tensile Strength: Ultimate (UTS), MPa | 700 to 1000 | |
| 640 to 740 |
| Tensile Strength: Yield (Proof), MPa | 390 to 910 | |
| 290 to 550 |
Thermal Properties
| Latent Heat of Fusion, J/g | 290 | |
| 290 |
| Maximum Temperature: Corrosion, °C | 430 | |
| 520 |
| Maximum Temperature: Mechanical, °C | 980 | |
| 920 |
| Melting Completion (Liquidus), °C | 1400 | |
| 1490 |
| Melting Onset (Solidus), °C | 1350 | |
| 1440 |
| Specific Heat Capacity, J/kg-K | 480 | |
| 470 |
| Thermal Conductivity, W/m-K | 14 | |
| 14 |
| Thermal Expansion, µm/m-K | 17 | |
| 17 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 2.5 | |
| 2.9 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 2.9 | |
| 3.2 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 15 | |
| 30 |
| Density, g/cm3 | 7.7 | |
| 8.1 |
| Embodied Carbon, kg CO2/kg material | 3.0 | |
| 5.0 |
| Embodied Energy, MJ/kg | 43 | |
| 73 |
| Embodied Water, L/kg | 160 | |
| 150 |
Common Calculations
| PREN (Pitting Resistance) | 25 | |
| 23 |
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 160 to 310 | |
| 130 to 180 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 380 to 2070 | |
| 210 to 760 |
| Stiffness to Weight: Axial, points | 14 | |
| 14 |
| 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 | |
| 20 to 22 |
| Thermal Diffusivity, mm2/s | 3.8 | |
| 3.7 |
| Thermal Shock Resistance, points | 15 to 21 | |
| 14 to 16 |
Alloy Composition
| Carbon (C), % | 0 to 0.040 | |
| 0.040 to 0.1 |
| Chromium (Cr), % | 19 to 21.5 | |
| 15.5 to 17.5 |
| Iron (Fe), % | 59.5 to 67.4 | |
| 57.9 to 65.7 |
| Manganese (Mn), % | 8.0 to 10 | |
| 0 to 1.5 |
| Nickel (Ni), % | 5.5 to 7.5 | |
| 15.5 to 17.5 |
| Niobium (Nb), % | 0 | |
| 0.4 to 1.2 |
| Nitrogen (N), % | 0.15 to 0.4 | |
| 0.060 to 0.14 |
| Phosphorus (P), % | 0 to 0.045 | |
| 0 to 0.035 |
| Silicon (Si), % | 0 to 1.0 | |
| 0.3 to 0.6 |
| Sulfur (S), % | 0 to 0.030 | |
| 0 to 0.015 |
| Tungsten (W), % | 0 | |
| 2.5 to 3.5 |