SAE-AISI 1039 Steel vs. EN 1.7725 Steel
Both SAE-AISI 1039 steel and EN 1.7725 steel are iron alloys. They have a very high 98% of their average alloy composition in common. There are 30 material properties with values for both materials. Properties with values for just one material (4, in this case) are not shown.
For each property being compared, the top bar is SAE-AISI 1039 steel and the bottom bar is EN 1.7725 steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Brinell Hardness | 180 to 200 | |
| 250 to 300 |
| Elastic (Young's, Tensile) Modulus, GPa | 190 | |
| 190 |
| Elongation at Break, % | 14 to 18 | |
| 14 |
| Fatigue Strength, MPa | 230 to 370 | |
| 390 to 550 |
| Poisson's Ratio | 0.29 | |
| 0.29 |
| Shear Modulus, GPa | 73 | |
| 73 |
| Tensile Strength: Ultimate (UTS), MPa | 610 to 690 | |
| 830 to 1000 |
| Tensile Strength: Yield (Proof), MPa | 340 to 580 | |
| 610 to 860 |
Thermal Properties
| Latent Heat of Fusion, J/g | 250 | |
| 250 |
| Maximum Temperature: Mechanical, °C | 400 | |
| 440 |
| Melting Completion (Liquidus), °C | 1460 | |
| 1460 |
| Melting Onset (Solidus), °C | 1420 | |
| 1420 |
| Specific Heat Capacity, J/kg-K | 470 | |
| 470 |
| Thermal Conductivity, W/m-K | 51 | |
| 39 |
| Thermal Expansion, µm/m-K | 12 | |
| 13 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 7.0 | |
| 7.4 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 8.1 | |
| 8.6 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 1.8 | |
| 2.9 |
| Density, g/cm3 | 7.8 | |
| 7.8 |
| Embodied Carbon, kg CO2/kg material | 1.4 | |
| 1.8 |
| Embodied Energy, MJ/kg | 18 | |
| 24 |
| Embodied Water, L/kg | 46 | |
| 54 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 88 to 94 | |
| 110 to 130 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 310 to 890 | |
| 980 to 1940 |
| Stiffness to Weight: Axial, points | 13 | |
| 13 |
| Stiffness to Weight: Bending, points | 24 | |
| 24 |
| Strength to Weight: Axial, points | 22 to 24 | |
| 29 to 35 |
| Strength to Weight: Bending, points | 20 to 22 | |
| 25 to 28 |
| Thermal Diffusivity, mm2/s | 14 | |
| 11 |
| Thermal Shock Resistance, points | 19 to 22 | |
| 24 to 29 |
Alloy Composition
| Carbon (C), % | 0.37 to 0.44 | |
| 0.27 to 0.34 |
| Chromium (Cr), % | 0 | |
| 1.3 to 1.7 |
| Iron (Fe), % | 98.5 to 98.9 | |
| 95.7 to 97.5 |
| Manganese (Mn), % | 0.7 to 1.0 | |
| 0.6 to 1.0 |
| Molybdenum (Mo), % | 0 | |
| 0.3 to 0.5 |
| Phosphorus (P), % | 0 to 0.040 | |
| 0 to 0.025 |
| Silicon (Si), % | 0 | |
| 0 to 0.6 |
| Sulfur (S), % | 0 to 0.050 | |
| 0 to 0.030 |
| Vanadium (V), % | 0 | |
| 0.050 to 0.15 |