EN 1.4640 Stainless Steel vs. AISI 304 Stainless Steel
Both EN 1.4640 stainless steel and AISI 304 stainless steel are iron alloys. They have a very high 96% of their average alloy composition in common. There are 33 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 AISI 304 stainless steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Brinell Hardness | 190 to 200 | |
| 170 to 360 |
| Elastic (Young's, Tensile) Modulus, GPa | 200 | |
| 200 |
| Elongation at Break, % | 51 | |
| 8.0 to 43 |
| Fatigue Strength, MPa | 230 to 250 | |
| 210 to 440 |
| Poisson's Ratio | 0.28 | |
| 0.28 |
| Shear Modulus, GPa | 77 | |
| 77 |
| Shear Strength, MPa | 440 to 460 | |
| 400 to 690 |
| Tensile Strength: Ultimate (UTS), MPa | 620 to 650 | |
| 580 to 1180 |
| Tensile Strength: Yield (Proof), MPa | 240 to 260 | |
| 230 to 860 |
Thermal Properties
| Latent Heat of Fusion, J/g | 280 | |
| 290 |
| Maximum Temperature: Corrosion, °C | 420 | |
| 420 |
| Maximum Temperature: Mechanical, °C | 930 | |
| 710 |
| Melting Completion (Liquidus), °C | 1420 | |
| 1450 |
| Melting Onset (Solidus), °C | 1380 | |
| 1400 |
| Specific Heat Capacity, J/kg-K | 480 | |
| 480 |
| Thermal Conductivity, W/m-K | 15 | |
| 16 |
| Thermal Expansion, µm/m-K | 16 | |
| 17 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 2.4 | |
| 2.4 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 2.7 | |
| 2.7 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 14 | |
| 15 |
| Density, g/cm3 | 7.8 | |
| 7.8 |
| Embodied Carbon, kg CO2/kg material | 2.8 | |
| 3.0 |
| Embodied Energy, MJ/kg | 40 | |
| 43 |
| Embodied Water, L/kg | 150 | |
| 150 |
Common Calculations
| PREN (Pitting Resistance) | 20 | |
| 20 |
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 250 to 260 | |
| 86 to 250 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 150 to 170 | |
| 140 to 1870 |
| Stiffness to Weight: Axial, points | 14 | |
| 14 |
| Stiffness to Weight: Bending, points | 25 | |
| 25 |
| Strength to Weight: Axial, points | 22 to 23 | |
| 21 to 42 |
| Strength to Weight: Bending, points | 21 | |
| 20 to 32 |
| Thermal Diffusivity, mm2/s | 4.0 | |
| 4.2 |
| Thermal Shock Resistance, points | 14 to 15 | |
| 12 to 25 |
Alloy Composition
| Carbon (C), % | 0.030 to 0.080 | |
| 0 to 0.080 |
| Chromium (Cr), % | 18 to 19 | |
| 18 to 20 |
| Copper (Cu), % | 1.3 to 2.0 | |
| 0 |
| Iron (Fe), % | 67.4 to 73.6 | |
| 66.5 to 74 |
| Manganese (Mn), % | 1.5 to 4.0 | |
| 0 to 2.0 |
| Nickel (Ni), % | 5.5 to 6.9 | |
| 8.0 to 10.5 |
| Nitrogen (N), % | 0.030 to 0.11 | |
| 0 to 0.1 |
| Phosphorus (P), % | 0 to 0.045 | |
| 0 to 0.045 |
| Silicon (Si), % | 0 to 0.5 | |
| 0 to 0.75 |
| Sulfur (S), % | 0 to 0.015 | |
| 0 to 0.030 |