Cold Finished SAE-AISI 4028 vs. Cold Finished SAE-AISI 4620
Both cold finished SAE-AISI 4028 and cold finished SAE-AISI 4620 are iron alloys. Both are furnished in the cold worked (strain hardened) condition. They have a very high 98% of their average alloy composition in common.
For each property being compared, the top bar is cold finished SAE-AISI 4028 and the bottom bar is cold finished SAE-AISI 4620.
Metric UnitsUS Customary Units
Mechanical Properties
| Brinell Hardness | 190 | |
| 210 |
| Elastic (Young's, Tensile) Modulus, GPa | 190 | |
| 190 |
| Elongation at Break, % | 14 | |
| 16 |
| Fatigue Strength, MPa | 330 | |
| 360 |
| Poisson's Ratio | 0.29 | |
| 0.29 |
| Shear Modulus, GPa | 73 | |
| 73 |
| Shear Strength, MPa | 380 | |
| 420 |
| Tensile Strength: Ultimate (UTS), MPa | 630 | |
| 680 |
| Tensile Strength: Yield (Proof), MPa | 520 | |
| 550 |
Thermal Properties
| Latent Heat of Fusion, J/g | 250 | |
| 250 |
| Maximum Temperature: Mechanical, °C | 400 | |
| 410 |
| 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 | 49 | |
| 47 |
| Thermal Expansion, µm/m-K | 12 | |
| 13 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 7.1 | |
| 7.3 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 8.1 | |
| 8.4 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 2.1 | |
| 3.2 |
| Density, g/cm3 | 7.8 | |
| 7.9 |
| Embodied Carbon, kg CO2/kg material | 1.5 | |
| 1.6 |
| Embodied Energy, MJ/kg | 19 | |
| 22 |
| Embodied Water, L/kg | 47 | |
| 50 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 81 | |
| 100 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 720 | |
| 800 |
| Stiffness to Weight: Axial, points | 13 | |
| 13 |
| Stiffness to Weight: Bending, points | 24 | |
| 24 |
| Strength to Weight: Axial, points | 22 | |
| 24 |
| Strength to Weight: Bending, points | 21 | |
| 22 |
| Thermal Diffusivity, mm2/s | 13 | |
| 13 |
| Thermal Shock Resistance, points | 20 | |
| 20 |
Alloy Composition
| Carbon (C), % | 0.25 to 0.3 | |
| 0.17 to 0.22 |
| Iron (Fe), % | 98.1 to 98.7 | |
| 96.4 to 97.4 |
| Manganese (Mn), % | 0.7 to 0.9 | |
| 0.45 to 0.65 |
| Molybdenum (Mo), % | 0.2 to 0.3 | |
| 0.2 to 0.3 |
| Nickel (Ni), % | 0 | |
| 1.7 to 2.0 |
| Phosphorus (P), % | 0 to 0.035 | |
| 0 to 0.035 |
| Silicon (Si), % | 0.15 to 0.35 | |
| 0.15 to 0.35 |
| Sulfur (S), % | 0.035 to 0.050 | |
| 0 to 0.040 |