EN 1.4525 Stainless Steel vs. SAE-AISI 4340M Steel
Both EN 1.4525 stainless steel and SAE-AISI 4340M steel are iron alloys. They have 79% of their average alloy composition in common. There are 30 material properties with values for both materials. Properties with values for just one material (6, in this case) are not shown.
For each property being compared, the top bar is EN 1.4525 stainless steel and the bottom bar is SAE-AISI 4340M steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 190 | |
| 190 |
| Elongation at Break, % | 5.6 to 13 | |
| 6.0 |
| Fatigue Strength, MPa | 480 to 540 | |
| 690 |
| Poisson's Ratio | 0.28 | |
| 0.29 |
| Shear Modulus, GPa | 76 | |
| 72 |
| Tensile Strength: Ultimate (UTS), MPa | 1030 to 1250 | |
| 2340 |
| Tensile Strength: Yield (Proof), MPa | 840 to 1120 | |
| 1240 |
Thermal Properties
| Latent Heat of Fusion, J/g | 280 | |
| 280 |
| Maximum Temperature: Mechanical, °C | 860 | |
| 430 |
| Melting Completion (Liquidus), °C | 1430 | |
| 1440 |
| Melting Onset (Solidus), °C | 1390 | |
| 1400 |
| Specific Heat Capacity, J/kg-K | 480 | |
| 480 |
| Thermal Conductivity, W/m-K | 18 | |
| 38 |
| Thermal Expansion, µm/m-K | 11 | |
| 13 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 2.2 | |
| 7.8 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 2.6 | |
| 9.1 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 13 | |
| 3.9 |
| Density, g/cm3 | 7.8 | |
| 7.8 |
| Embodied Carbon, kg CO2/kg material | 2.8 | |
| 1.9 |
| Embodied Energy, MJ/kg | 39 | |
| 26 |
| Embodied Water, L/kg | 130 | |
| 55 |
Common Calculations
| PREN (Pitting Resistance) | 18 | |
| 2.2 |
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 68 to 130 | |
| 120 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 1820 to 3230 | |
| 4120 |
| Stiffness to Weight: Axial, points | 14 | |
| 13 |
| Stiffness to Weight: Bending, points | 25 | |
| 25 |
| Strength to Weight: Axial, points | 36 to 45 | |
| 84 |
| Strength to Weight: Bending, points | 29 to 33 | |
| 51 |
| Thermal Diffusivity, mm2/s | 4.7 | |
| 10 |
| Thermal Shock Resistance, points | 34 to 41 | |
| 70 |
Alloy Composition
| Carbon (C), % | 0 to 0.070 | |
| 0.38 to 0.43 |
| Chromium (Cr), % | 15 to 17 | |
| 0.7 to 1.0 |
| Copper (Cu), % | 2.5 to 4.0 | |
| 0 |
| Iron (Fe), % | 70.4 to 79 | |
| 93.3 to 94.8 |
| Manganese (Mn), % | 0 to 1.0 | |
| 0.65 to 0.9 |
| Molybdenum (Mo), % | 0 to 0.8 | |
| 0.35 to 0.45 |
| Nickel (Ni), % | 3.5 to 5.5 | |
| 1.7 to 2.0 |
| Niobium (Nb), % | 0 to 0.35 | |
| 0 |
| Nitrogen (N), % | 0 to 0.050 | |
| 0 |
| Phosphorus (P), % | 0 to 0.035 | |
| 0 to 0.012 |
| Silicon (Si), % | 0 to 0.8 | |
| 1.5 to 1.8 |
| Sulfur (S), % | 0 to 0.025 | |
| 0 to 0.012 |
| Vanadium (V), % | 0 | |
| 0.050 to 0.1 |