SAE-AISI 1039 Steel vs. SAE-AISI 4130 Steel
Both SAE-AISI 1039 steel and SAE-AISI 4130 steel are iron alloys. They have a very high 99% of their average alloy composition in common. There are 31 material properties with values for both materials. Properties with values for just one material (1, in this case) are not shown.
For each property being compared, the top bar is SAE-AISI 1039 steel and the bottom bar is SAE-AISI 4130 steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Brinell Hardness | 180 to 200 | |
| 200 to 300 |
| Elastic (Young's, Tensile) Modulus, GPa | 190 | |
| 190 |
| Elongation at Break, % | 14 to 18 | |
| 13 to 26 |
| Fatigue Strength, MPa | 230 to 370 | |
| 320 to 660 |
| Poisson's Ratio | 0.29 | |
| 0.29 |
| Shear Modulus, GPa | 73 | |
| 73 |
| Shear Strength, MPa | 380 to 420 | |
| 340 to 640 |
| Tensile Strength: Ultimate (UTS), MPa | 610 to 690 | |
| 530 to 1040 |
| Tensile Strength: Yield (Proof), MPa | 340 to 580 | |
| 440 to 980 |
Thermal Properties
| Latent Heat of Fusion, J/g | 250 | |
| 250 |
| Maximum Temperature: Mechanical, °C | 400 | |
| 420 |
| 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 | |
| 43 |
| Thermal Expansion, µm/m-K | 12 | |
| 13 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 7.0 | |
| 7.2 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 8.1 | |
| 8.3 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 1.8 | |
| 2.4 |
| Density, g/cm3 | 7.8 | |
| 7.8 |
| Embodied Carbon, kg CO2/kg material | 1.4 | |
| 1.5 |
| Embodied Energy, MJ/kg | 18 | |
| 20 |
| Embodied Water, L/kg | 46 | |
| 50 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 88 to 94 | |
| 83 to 180 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 310 to 890 | |
| 500 to 2550 |
| Stiffness to Weight: Axial, points | 13 | |
| 13 |
| Stiffness to Weight: Bending, points | 24 | |
| 24 |
| Strength to Weight: Axial, points | 22 to 24 | |
| 19 to 37 |
| Strength to Weight: Bending, points | 20 to 22 | |
| 19 to 29 |
| Thermal Diffusivity, mm2/s | 14 | |
| 12 |
| Thermal Shock Resistance, points | 19 to 22 | |
| 16 to 31 |
Alloy Composition
| Carbon (C), % | 0.37 to 0.44 | |
| 0.28 to 0.33 |
| Chromium (Cr), % | 0 | |
| 0.8 to 1.1 |
| Iron (Fe), % | 98.5 to 98.9 | |
| 97.3 to 98.2 |
| Manganese (Mn), % | 0.7 to 1.0 | |
| 0.4 to 0.6 |
| Molybdenum (Mo), % | 0 | |
| 0.15 to 0.25 |
| Phosphorus (P), % | 0 to 0.040 | |
| 0 to 0.035 |
| Silicon (Si), % | 0 | |
| 0.15 to 0.35 |
| Sulfur (S), % | 0 to 0.050 | |
| 0 to 0.040 |