EN 1.4945 Stainless Steel vs. SAE-AISI 8740 Steel
Both EN 1.4945 stainless steel and SAE-AISI 8740 steel are iron alloys. They have 64% of their average alloy composition in common. There are 31 material properties with values for both materials. Properties with values for just one material (2, in this case) are not shown.
For each property being compared, the top bar is EN 1.4945 stainless steel and the bottom bar is SAE-AISI 8740 steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Brinell Hardness | 200 to 220 | |
| 170 to 200 |
| Elastic (Young's, Tensile) Modulus, GPa | 200 | |
| 190 |
| Elongation at Break, % | 19 to 34 | |
| 11 to 23 |
| Fatigue Strength, MPa | 230 to 350 | |
| 270 to 350 |
| Poisson's Ratio | 0.28 | |
| 0.29 |
| Shear Modulus, GPa | 77 | |
| 73 |
| Shear Strength, MPa | 430 to 460 | |
| 370 to 400 |
| Tensile Strength: Ultimate (UTS), MPa | 640 to 740 | |
| 580 to 670 |
| Tensile Strength: Yield (Proof), MPa | 290 to 550 | |
| 380 to 570 |
Thermal Properties
| Latent Heat of Fusion, J/g | 290 | |
| 250 |
| Maximum Temperature: Mechanical, °C | 920 | |
| 410 |
| Melting Completion (Liquidus), °C | 1490 | |
| 1460 |
| Melting Onset (Solidus), °C | 1440 | |
| 1420 |
| Specific Heat Capacity, J/kg-K | 470 | |
| 470 |
| Thermal Conductivity, W/m-K | 14 | |
| 39 |
| Thermal Expansion, µm/m-K | 17 | |
| 13 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 2.9 | |
| 7.3 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 3.2 | |
| 8.4 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 30 | |
| 2.6 |
| Density, g/cm3 | 8.1 | |
| 7.8 |
| Embodied Carbon, kg CO2/kg material | 5.0 | |
| 1.5 |
| Embodied Energy, MJ/kg | 73 | |
| 20 |
| Embodied Water, L/kg | 150 | |
| 50 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 130 to 180 | |
| 71 to 120 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 210 to 760 | |
| 390 to 850 |
| Stiffness to Weight: Axial, points | 14 | |
| 13 |
| Stiffness to Weight: Bending, points | 24 | |
| 24 |
| Strength to Weight: Axial, points | 22 to 25 | |
| 20 to 24 |
| Strength to Weight: Bending, points | 20 to 22 | |
| 20 to 22 |
| Thermal Diffusivity, mm2/s | 3.7 | |
| 10 |
| Thermal Shock Resistance, points | 14 to 16 | |
| 17 to 20 |
Alloy Composition
| Carbon (C), % | 0.040 to 0.1 | |
| 0.38 to 0.43 |
| Chromium (Cr), % | 15.5 to 17.5 | |
| 0.4 to 0.6 |
| Iron (Fe), % | 57.9 to 65.7 | |
| 96.5 to 97.7 |
| Manganese (Mn), % | 0 to 1.5 | |
| 0.75 to 1.0 |
| Molybdenum (Mo), % | 0 | |
| 0.2 to 0.3 |
| Nickel (Ni), % | 15.5 to 17.5 | |
| 0.4 to 0.7 |
| Niobium (Nb), % | 0.4 to 1.2 | |
| 0 |
| Nitrogen (N), % | 0.060 to 0.14 | |
| 0 |
| Phosphorus (P), % | 0 to 0.035 | |
| 0 to 0.035 |
| Silicon (Si), % | 0.3 to 0.6 | |
| 0.15 to 0.35 |
| Sulfur (S), % | 0 to 0.015 | |
| 0 to 0.040 |
| Tungsten (W), % | 2.5 to 3.5 | |
| 0 |