EN 1.4640 Stainless Steel vs. ACI-ASTM CF20 Steel
Both EN 1.4640 stainless steel and ACI-ASTM CF20 steel are iron alloys. They have a moderately high 95% 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 ACI-ASTM CF20 steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Brinell Hardness | 190 to 200 | |
| 160 |
| Elastic (Young's, Tensile) Modulus, GPa | 200 | |
| 200 |
| Elongation at Break, % | 51 | |
| 50 |
| Fatigue Strength, MPa | 230 to 250 | |
| 240 |
| Poisson's Ratio | 0.28 | |
| 0.28 |
| Shear Modulus, GPa | 77 | |
| 77 |
| Tensile Strength: Ultimate (UTS), MPa | 620 to 650 | |
| 530 |
| Tensile Strength: Yield (Proof), MPa | 240 to 260 | |
| 250 |
Thermal Properties
| Latent Heat of Fusion, J/g | 280 | |
| 300 |
| Maximum Temperature: Corrosion, °C | 420 | |
| 420 |
| Maximum Temperature: Mechanical, °C | 930 | |
| 970 |
| Melting Completion (Liquidus), °C | 1420 | |
| 1420 |
| Melting Onset (Solidus), °C | 1380 | |
| 1410 |
| 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 | |
| 2.0 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 2.7 | |
| 2.3 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 14 | |
| 16 |
| Density, g/cm3 | 7.8 | |
| 7.8 |
| Embodied Carbon, kg CO2/kg material | 2.8 | |
| 3.1 |
| Embodied Energy, MJ/kg | 40 | |
| 44 |
| Embodied Water, L/kg | 150 | |
| 150 |
Common Calculations
| PREN (Pitting Resistance) | 20 | |
| 20 |
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 250 to 260 | |
| 220 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 150 to 170 | |
| 160 |
| Stiffness to Weight: Axial, points | 14 | |
| 14 |
| Stiffness to Weight: Bending, points | 25 | |
| 25 |
| Strength to Weight: Axial, points | 22 to 23 | |
| 19 |
| Strength to Weight: Bending, points | 21 | |
| 19 |
| Thermal Diffusivity, mm2/s | 4.0 | |
| 4.3 |
| Thermal Shock Resistance, points | 14 to 15 | |
| 11 |
Alloy Composition
| Carbon (C), % | 0.030 to 0.080 | |
| 0 to 0.2 |
| Chromium (Cr), % | 18 to 19 | |
| 18 to 21 |
| Copper (Cu), % | 1.3 to 2.0 | |
| 0 |
| Iron (Fe), % | 67.4 to 73.6 | |
| 64.2 to 74 |
| Manganese (Mn), % | 1.5 to 4.0 | |
| 0 to 1.5 |
| Nickel (Ni), % | 5.5 to 6.9 | |
| 8.0 to 11 |
| Nitrogen (N), % | 0.030 to 0.11 | |
| 0 |
| Phosphorus (P), % | 0 to 0.045 | |
| 0 to 0.040 |
| Silicon (Si), % | 0 to 0.5 | |
| 0 to 2.0 |
| Sulfur (S), % | 0 to 0.015 | |
| 0 to 0.040 |