EN 1.4945 Stainless Steel vs. S21904 Stainless Steel
Both EN 1.4945 stainless steel and S21904 stainless steel are iron alloys. They have 86% of their average alloy composition in common.
For each property being compared, the top bar is EN 1.4945 stainless steel and the bottom bar is S21904 stainless steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Brinell Hardness | 200 to 220 | |
| 210 to 300 |
| Elastic (Young's, Tensile) Modulus, GPa | 200 | |
| 200 |
| Elongation at Break, % | 19 to 34 | |
| 17 to 51 |
| Fatigue Strength, MPa | 230 to 350 | |
| 380 to 550 |
| Poisson's Ratio | 0.28 | |
| 0.28 |
| Shear Modulus, GPa | 77 | |
| 78 |
| Shear Strength, MPa | 430 to 460 | |
| 510 to 620 |
| Tensile Strength: Ultimate (UTS), MPa | 640 to 740 | |
| 700 to 1000 |
| Tensile Strength: Yield (Proof), MPa | 290 to 550 | |
| 390 to 910 |
Thermal Properties
| Latent Heat of Fusion, J/g | 290 | |
| 290 |
| Maximum Temperature: Corrosion, °C | 520 | |
| 430 |
| Maximum Temperature: Mechanical, °C | 920 | |
| 980 |
| Melting Completion (Liquidus), °C | 1490 | |
| 1400 |
| Melting Onset (Solidus), °C | 1440 | |
| 1350 |
| Specific Heat Capacity, J/kg-K | 470 | |
| 480 |
| Thermal Conductivity, W/m-K | 14 | |
| 14 |
| Thermal Expansion, µm/m-K | 17 | |
| 17 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 2.9 | |
| 2.5 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 3.2 | |
| 2.9 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 30 | |
| 15 |
| Density, g/cm3 | 8.1 | |
| 7.7 |
| Embodied Carbon, kg CO2/kg material | 5.0 | |
| 3.0 |
| Embodied Energy, MJ/kg | 73 | |
| 43 |
| Embodied Water, L/kg | 150 | |
| 160 |
Common Calculations
| PREN (Pitting Resistance) | 23 | |
| 25 |
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 130 to 180 | |
| 160 to 310 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 210 to 760 | |
| 380 to 2070 |
| Stiffness to Weight: Axial, points | 14 | |
| 14 |
| Stiffness to Weight: Bending, points | 24 | |
| 25 |
| Strength to Weight: Axial, points | 22 to 25 | |
| 25 to 36 |
| Strength to Weight: Bending, points | 20 to 22 | |
| 23 to 29 |
| Thermal Diffusivity, mm2/s | 3.7 | |
| 3.8 |
| Thermal Shock Resistance, points | 14 to 16 | |
| 15 to 21 |
Alloy Composition
| Carbon (C), % | 0.040 to 0.1 | |
| 0 to 0.040 |
| Chromium (Cr), % | 15.5 to 17.5 | |
| 19 to 21.5 |
| Iron (Fe), % | 57.9 to 65.7 | |
| 59.5 to 67.4 |
| Manganese (Mn), % | 0 to 1.5 | |
| 8.0 to 10 |
| Nickel (Ni), % | 15.5 to 17.5 | |
| 5.5 to 7.5 |
| Niobium (Nb), % | 0.4 to 1.2 | |
| 0 |
| Nitrogen (N), % | 0.060 to 0.14 | |
| 0.15 to 0.4 |
| Phosphorus (P), % | 0 to 0.035 | |
| 0 to 0.045 |
| Silicon (Si), % | 0.3 to 0.6 | |
| 0 to 1.0 |
| Sulfur (S), % | 0 to 0.015 | |
| 0 to 0.030 |
| Tungsten (W), % | 2.5 to 3.5 | |
| 0 |