EN 1.4903 Stainless Steel vs. EN 1.4901 Stainless Steel
Both EN 1.4903 stainless steel and EN 1.4901 stainless steel are iron alloys. They have a very high 98% of their average alloy composition in common.
For each property being compared, the top bar is EN 1.4903 stainless steel and the bottom bar is EN 1.4901 stainless steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 190 | |
| 190 |
| Elongation at Break, % | 20 to 21 | |
| 19 |
| Fatigue Strength, MPa | 320 to 330 | |
| 310 |
| Impact Strength: V-Notched Charpy, J | 42 to 46 | |
| 38 |
| Poisson's Ratio | 0.28 | |
| 0.28 |
| Shear Modulus, GPa | 75 | |
| 76 |
| Shear Strength, MPa | 420 | |
| 460 |
| Tensile Strength: Ultimate (UTS), MPa | 670 to 680 | |
| 740 |
| Tensile Strength: Yield (Proof), MPa | 500 | |
| 490 |
Thermal Properties
| Latent Heat of Fusion, J/g | 270 | |
| 260 |
| Maximum Temperature: Corrosion, °C | 380 | |
| 380 |
| Maximum Temperature: Mechanical, °C | 650 | |
| 650 |
| Melting Completion (Liquidus), °C | 1460 | |
| 1490 |
| Melting Onset (Solidus), °C | 1420 | |
| 1450 |
| Specific Heat Capacity, J/kg-K | 470 | |
| 470 |
| Thermal Conductivity, W/m-K | 26 | |
| 26 |
| Thermal Expansion, µm/m-K | 11 | |
| 12 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 3.4 | |
| 8.2 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 4.0 | |
| 9.3 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 7.0 | |
| 11 |
| Density, g/cm3 | 7.8 | |
| 7.9 |
| Embodied Carbon, kg CO2/kg material | 2.6 | |
| 2.8 |
| Embodied Energy, MJ/kg | 36 | |
| 40 |
| Embodied Water, L/kg | 88 | |
| 89 |
Common Calculations
| PREN (Pitting Resistance) | 13 | |
| 14 |
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 120 to 130 | |
| 120 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 650 | |
| 620 |
| Stiffness to Weight: Axial, points | 14 | |
| 14 |
| Stiffness to Weight: Bending, points | 25 | |
| 24 |
| Strength to Weight: Axial, points | 24 | |
| 26 |
| Strength to Weight: Bending, points | 22 | |
| 23 |
| Thermal Diffusivity, mm2/s | 7.0 | |
| 6.9 |
| Thermal Shock Resistance, points | 23 | |
| 23 |
Alloy Composition
| Aluminum (Al), % | 0 to 0.040 | |
| 0 to 0.020 |
| Boron (B), % | 0 | |
| 0.0010 to 0.0060 |
| Carbon (C), % | 0.080 to 0.12 | |
| 0.070 to 0.13 |
| Chromium (Cr), % | 8.0 to 9.5 | |
| 8.5 to 9.5 |
| Copper (Cu), % | 0 to 0.3 | |
| 0 |
| Iron (Fe), % | 87.1 to 90.5 | |
| 85.8 to 89.1 |
| Manganese (Mn), % | 0.3 to 0.6 | |
| 0.3 to 0.6 |
| Molybdenum (Mo), % | 0.85 to 1.1 | |
| 0.3 to 0.6 |
| Nickel (Ni), % | 0 to 0.4 | |
| 0 to 0.4 |
| Niobium (Nb), % | 0.060 to 0.1 | |
| 0.040 to 0.090 |
| Nitrogen (N), % | 0.030 to 0.070 | |
| 0.030 to 0.070 |
| Phosphorus (P), % | 0 to 0.025 | |
| 0 to 0.020 |
| Silicon (Si), % | 0 to 0.5 | |
| 0 to 0.5 |
| Sulfur (S), % | 0 to 0.015 | |
| 0 to 0.010 |
| Titanium (Ti), % | 0 | |
| 0 to 0.010 |
| Tungsten (W), % | 0 | |
| 1.5 to 2.0 |
| Vanadium (V), % | 0.18 to 0.25 | |
| 0.15 to 0.25 |
| Zirconium (Zr), % | 0 | |
| 0 to 0.010 |