EN 1.4634 Stainless Steel vs. EN 1.4740 Stainless Steel
Both EN 1.4634 stainless steel and EN 1.4740 stainless steel are iron alloys. Both are furnished in the annealed condition. They have a very high 98% of their average alloy composition in common. There are 23 material properties with values for both materials. Properties with values for just one material (10, in this case) are not shown.
For each property being compared, the top bar is EN 1.4634 stainless steel and the bottom bar is EN 1.4740 stainless steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 200 | |
| 200 |
| Elongation at Break, % | 21 | |
| 22 |
| Poisson's Ratio | 0.28 | |
| 0.28 |
| Shear Modulus, GPa | 77 | |
| 77 |
Thermal Properties
| Latent Heat of Fusion, J/g | 290 | |
| 300 |
| Maximum Temperature: Corrosion, °C | 500 | |
| 410 |
| Maximum Temperature: Mechanical, °C | 900 | |
| 900 |
| Melting Completion (Liquidus), °C | 1430 | |
| 1420 |
| Melting Onset (Solidus), °C | 1390 | |
| 1370 |
| Specific Heat Capacity, J/kg-K | 480 | |
| 490 |
| Thermal Conductivity, W/m-K | 21 | |
| 18 |
| Thermal Expansion, µm/m-K | 10 | |
| 10 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 2.5 | |
| 2.2 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 3.0 | |
| 2.6 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 13 | |
| 9.5 |
| Density, g/cm3 | 7.7 | |
| 7.6 |
| Embodied Carbon, kg CO2/kg material | 2.9 | |
| 2.3 |
| Embodied Energy, MJ/kg | 42 | |
| 32 |
| Embodied Water, L/kg | 140 | |
| 120 |
Common Calculations
| PREN (Pitting Resistance) | 19 | |
| 18 |
| Stiffness to Weight: Axial, points | 14 | |
| 14 |
| Stiffness to Weight: Bending, points | 25 | |
| 25 |
| Thermal Diffusivity, mm2/s | 5.8 | |
| 4.8 |
Alloy Composition
| Aluminum (Al), % | 0.2 to 1.5 | |
| 0 |
| Carbon (C), % | 0 to 0.030 | |
| 0.3 to 0.5 |
| Chromium (Cr), % | 17.5 to 18.5 | |
| 16 to 19 |
| Copper (Cu), % | 0 to 0.5 | |
| 0 |
| Iron (Fe), % | 74.9 to 81.8 | |
| 75.4 to 82.7 |
| Manganese (Mn), % | 0 to 1.0 | |
| 0 to 1.0 |
| Molybdenum (Mo), % | 0 to 0.5 | |
| 0 to 0.5 |
| Nickel (Ni), % | 0 to 0.5 | |
| 0 to 1.0 |
| Niobium (Nb), % | 0.3 to 1.0 | |
| 0 |
| Phosphorus (P), % | 0 to 0.050 | |
| 0 to 0.040 |
| Silicon (Si), % | 0.2 to 1.5 | |
| 1.0 to 2.5 |
| Sulfur (S), % | 0 to 0.050 | |
| 0 to 0.030 |