SAE-AISI 4340M Steel vs. EN 1.4477 Stainless Steel
Both SAE-AISI 4340M steel and EN 1.4477 stainless steel are iron alloys. They have 64% of their average alloy composition in common. There are 33 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 SAE-AISI 4340M steel and the bottom bar is EN 1.4477 stainless steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Brinell Hardness | 710 | |
| 270 |
| Elastic (Young's, Tensile) Modulus, GPa | 190 | |
| 210 |
| Elongation at Break, % | 6.0 | |
| 22 to 23 |
| Fatigue Strength, MPa | 690 | |
| 420 to 490 |
| Impact Strength: V-Notched Charpy, J | 18 | |
| 110 |
| Poisson's Ratio | 0.29 | |
| 0.27 |
| Shear Modulus, GPa | 72 | |
| 81 |
| Shear Strength, MPa | 1360 | |
| 550 to 580 |
| Tensile Strength: Ultimate (UTS), MPa | 2340 | |
| 880 to 930 |
| Tensile Strength: Yield (Proof), MPa | 1240 | |
| 620 to 730 |
Thermal Properties
| Latent Heat of Fusion, J/g | 280 | |
| 300 |
| Maximum Temperature: Mechanical, °C | 430 | |
| 1100 |
| Melting Completion (Liquidus), °C | 1440 | |
| 1430 |
| Melting Onset (Solidus), °C | 1400 | |
| 1380 |
| Specific Heat Capacity, J/kg-K | 480 | |
| 480 |
| Thermal Conductivity, W/m-K | 38 | |
| 13 |
| Thermal Expansion, µm/m-K | 13 | |
| 13 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 7.8 | |
| 2.2 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 9.1 | |
| 2.5 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 3.9 | |
| 20 |
| Density, g/cm3 | 7.8 | |
| 7.7 |
| Embodied Carbon, kg CO2/kg material | 1.9 | |
| 3.7 |
| Embodied Energy, MJ/kg | 26 | |
| 52 |
| Embodied Water, L/kg | 55 | |
| 190 |
Common Calculations
| PREN (Pitting Resistance) | 2.2 | |
| 41 |
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 120 | |
| 180 to 190 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 4120 | |
| 940 to 1290 |
| Stiffness to Weight: Axial, points | 13 | |
| 15 |
| Stiffness to Weight: Bending, points | 25 | |
| 25 |
| Strength to Weight: Axial, points | 84 | |
| 31 to 33 |
| Strength to Weight: Bending, points | 51 | |
| 26 to 27 |
| Thermal Diffusivity, mm2/s | 10 | |
| 3.5 |
| Thermal Shock Resistance, points | 70 | |
| 23 to 25 |
Alloy Composition
| Carbon (C), % | 0.38 to 0.43 | |
| 0 to 0.030 |
| Chromium (Cr), % | 0.7 to 1.0 | |
| 28 to 30 |
| Copper (Cu), % | 0 | |
| 0 to 0.8 |
| Iron (Fe), % | 93.3 to 94.8 | |
| 56.6 to 63.6 |
| Manganese (Mn), % | 0.65 to 0.9 | |
| 0.8 to 1.5 |
| Molybdenum (Mo), % | 0.35 to 0.45 | |
| 1.5 to 2.6 |
| Nickel (Ni), % | 1.7 to 2.0 | |
| 5.8 to 7.5 |
| Nitrogen (N), % | 0 | |
| 0.3 to 0.4 |
| Phosphorus (P), % | 0 to 0.012 | |
| 0 to 0.030 |
| Silicon (Si), % | 1.5 to 1.8 | |
| 0 to 0.5 |
| Sulfur (S), % | 0 to 0.012 | |
| 0 to 0.015 |
| Vanadium (V), % | 0.050 to 0.1 | |
| 0 |