EN 1.4640 Stainless Steel vs. EN 1.4938 Stainless Steel
Both EN 1.4640 stainless steel and EN 1.4938 stainless steel are iron alloys. They have 86% of their average alloy composition in common. There are 32 material properties with values for both materials. Properties with values for just one material (1, in this case) are not shown.
For each property being compared, the top bar is EN 1.4640 stainless steel and the bottom bar is EN 1.4938 stainless steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 200 | |
| 200 |
| Elongation at Break, % | 51 | |
| 16 to 17 |
| Fatigue Strength, MPa | 230 to 250 | |
| 390 to 520 |
| Poisson's Ratio | 0.28 | |
| 0.28 |
| Shear Modulus, GPa | 77 | |
| 76 |
| Shear Strength, MPa | 440 to 460 | |
| 540 to 630 |
| Tensile Strength: Ultimate (UTS), MPa | 620 to 650 | |
| 870 to 1030 |
| Tensile Strength: Yield (Proof), MPa | 240 to 260 | |
| 640 to 870 |
Thermal Properties
| Latent Heat of Fusion, J/g | 280 | |
| 270 |
| Maximum Temperature: Corrosion, °C | 420 | |
| 390 |
| Maximum Temperature: Mechanical, °C | 930 | |
| 750 |
| Melting Completion (Liquidus), °C | 1420 | |
| 1460 |
| Melting Onset (Solidus), °C | 1380 | |
| 1420 |
| Specific Heat Capacity, J/kg-K | 480 | |
| 470 |
| Thermal Conductivity, W/m-K | 15 | |
| 30 |
| Thermal Expansion, µm/m-K | 16 | |
| 11 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 2.4 | |
| 2.9 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 2.7 | |
| 3.3 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 14 | |
| 10 |
| Density, g/cm3 | 7.8 | |
| 7.8 |
| Embodied Carbon, kg CO2/kg material | 2.8 | |
| 3.3 |
| Embodied Energy, MJ/kg | 40 | |
| 47 |
| Embodied Water, L/kg | 150 | |
| 110 |
Common Calculations
| PREN (Pitting Resistance) | 20 | |
| 18 |
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 250 to 260 | |
| 140 to 160 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 150 to 170 | |
| 1050 to 1920 |
| Stiffness to Weight: Axial, points | 14 | |
| 14 |
| Stiffness to Weight: Bending, points | 25 | |
| 25 |
| Strength to Weight: Axial, points | 22 to 23 | |
| 31 to 37 |
| Strength to Weight: Bending, points | 21 | |
| 26 to 29 |
| Thermal Diffusivity, mm2/s | 4.0 | |
| 8.1 |
| Thermal Shock Resistance, points | 14 to 15 | |
| 30 to 35 |
Alloy Composition
| Carbon (C), % | 0.030 to 0.080 | |
| 0.080 to 0.15 |
| Chromium (Cr), % | 18 to 19 | |
| 11 to 12.5 |
| Copper (Cu), % | 1.3 to 2.0 | |
| 0 |
| Iron (Fe), % | 67.4 to 73.6 | |
| 80.5 to 84.8 |
| Manganese (Mn), % | 1.5 to 4.0 | |
| 0.4 to 0.9 |
| Molybdenum (Mo), % | 0 | |
| 1.5 to 2.0 |
| Nickel (Ni), % | 5.5 to 6.9 | |
| 2.0 to 3.0 |
| Nitrogen (N), % | 0.030 to 0.11 | |
| 0.020 to 0.040 |
| Phosphorus (P), % | 0 to 0.045 | |
| 0 to 0.025 |
| Silicon (Si), % | 0 to 0.5 | |
| 0 to 0.5 |
| Sulfur (S), % | 0 to 0.015 | |
| 0 to 0.015 |
| Vanadium (V), % | 0 | |
| 0.25 to 0.4 |