ACI-ASTM CF20 Steel vs. AISI 414 Stainless Steel
Both ACI-ASTM CF20 steel and AISI 414 stainless steel are iron alloys. They have 85% of their average alloy composition in common. There are 31 material properties with values for both materials. Properties with values for just one material (3, in this case) are not shown.
For each property being compared, the top bar is ACI-ASTM CF20 steel and the bottom bar is AISI 414 stainless steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 200 | |
| 190 |
| Elongation at Break, % | 50 | |
| 17 |
| Fatigue Strength, MPa | 240 | |
| 430 to 480 |
| Poisson's Ratio | 0.28 | |
| 0.28 |
| Shear Modulus, GPa | 77 | |
| 76 |
| Tensile Strength: Ultimate (UTS), MPa | 530 | |
| 900 to 960 |
| Tensile Strength: Yield (Proof), MPa | 250 | |
| 700 to 790 |
Thermal Properties
| Latent Heat of Fusion, J/g | 300 | |
| 280 |
| Maximum Temperature: Corrosion, °C | 420 | |
| 390 |
| Maximum Temperature: Mechanical, °C | 970 | |
| 750 |
| Melting Completion (Liquidus), °C | 1420 | |
| 1440 |
| Melting Onset (Solidus), °C | 1410 | |
| 1400 |
| Specific Heat Capacity, J/kg-K | 480 | |
| 480 |
| Thermal Conductivity, W/m-K | 16 | |
| 25 |
| Thermal Expansion, µm/m-K | 17 | |
| 10 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 2.0 | |
| 2.5 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 2.3 | |
| 2.9 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 16 | |
| 8.0 |
| Density, g/cm3 | 7.8 | |
| 7.8 |
| Embodied Carbon, kg CO2/kg material | 3.1 | |
| 2.1 |
| Embodied Energy, MJ/kg | 44 | |
| 29 |
| Embodied Water, L/kg | 150 | |
| 100 |
Common Calculations
| PREN (Pitting Resistance) | 20 | |
| 13 |
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 220 | |
| 140 to 150 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 160 | |
| 1260 to 1590 |
| Stiffness to Weight: Axial, points | 14 | |
| 14 |
| Stiffness to Weight: Bending, points | 25 | |
| 25 |
| Strength to Weight: Axial, points | 19 | |
| 32 to 34 |
| Strength to Weight: Bending, points | 19 | |
| 27 to 28 |
| Thermal Diffusivity, mm2/s | 4.3 | |
| 6.7 |
| Thermal Shock Resistance, points | 11 | |
| 33 to 35 |
Alloy Composition
| Carbon (C), % | 0 to 0.2 | |
| 0 to 0.15 |
| Chromium (Cr), % | 18 to 21 | |
| 11.5 to 13.5 |
| Iron (Fe), % | 64.2 to 74 | |
| 81.8 to 87.3 |
| Manganese (Mn), % | 0 to 1.5 | |
| 0 to 1.0 |
| Nickel (Ni), % | 8.0 to 11 | |
| 1.3 to 2.5 |
| Phosphorus (P), % | 0 to 0.040 | |
| 0 to 0.040 |
| Silicon (Si), % | 0 to 2.0 | |
| 0 to 1.0 |
| Sulfur (S), % | 0 to 0.040 | |
| 0 to 0.030 |