Nickel 625 vs. SAE-AISI 4340 Steel
Nickel 625 belongs to the nickel alloys classification, while SAE-AISI 4340 steel belongs to the iron alloys. There are 30 material properties with values for both materials. Properties with values for just one material (2, in this case) are not shown.
For each property being compared, the top bar is nickel 625 and the bottom bar is SAE-AISI 4340 steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 200 | |
| 190 |
| Elongation at Break, % | 33 to 34 | |
| 12 to 22 |
| Fatigue Strength, MPa | 240 to 320 | |
| 330 to 740 |
| Poisson's Ratio | 0.29 | |
| 0.29 |
| Shear Modulus, GPa | 79 | |
| 73 |
| Shear Strength, MPa | 530 to 600 | |
| 430 to 770 |
| Tensile Strength: Ultimate (UTS), MPa | 790 to 910 | |
| 690 to 1280 |
| Tensile Strength: Yield (Proof), MPa | 320 to 450 | |
| 470 to 1150 |
Thermal Properties
| Latent Heat of Fusion, J/g | 330 | |
| 250 |
| Maximum Temperature: Mechanical, °C | 980 | |
| 430 |
| Melting Completion (Liquidus), °C | 1350 | |
| 1460 |
| Melting Onset (Solidus), °C | 1290 | |
| 1420 |
| Specific Heat Capacity, J/kg-K | 440 | |
| 470 |
| Thermal Conductivity, W/m-K | 11 | |
| 44 |
| Thermal Expansion, µm/m-K | 13 | |
| 13 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 1.3 | |
| 7.5 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 1.4 | |
| 8.6 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 80 | |
| 3.5 |
| Density, g/cm3 | 8.6 | |
| 7.8 |
| Embodied Carbon, kg CO2/kg material | 14 | |
| 1.7 |
| Embodied Energy, MJ/kg | 190 | |
| 22 |
| Embodied Water, L/kg | 290 | |
| 53 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 220 to 250 | |
| 79 to 170 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 260 to 490 | |
| 590 to 3490 |
| Stiffness to Weight: Axial, points | 13 | |
| 13 |
| Stiffness to Weight: Bending, points | 23 | |
| 24 |
| Strength to Weight: Axial, points | 26 to 29 | |
| 24 to 45 |
| Strength to Weight: Bending, points | 22 to 24 | |
| 22 to 33 |
| Thermal Diffusivity, mm2/s | 2.9 | |
| 12 |
| Thermal Shock Resistance, points | 22 to 25 | |
| 20 to 38 |
Alloy Composition
| Aluminum (Al), % | 0 to 0.4 | |
| 0 |
| Carbon (C), % | 0 to 0.1 | |
| 0.38 to 0.43 |
| Chromium (Cr), % | 20 to 23 | |
| 0.7 to 0.9 |
| Cobalt (Co), % | 0 to 1.0 | |
| 0 |
| Iron (Fe), % | 0 to 5.0 | |
| 95.1 to 96.3 |
| Manganese (Mn), % | 0 to 0.5 | |
| 0.6 to 0.8 |
| Molybdenum (Mo), % | 8.0 to 10 | |
| 0.2 to 0.3 |
| Nickel (Ni), % | 58 to 68.9 | |
| 1.7 to 2.0 |
| Niobium (Nb), % | 3.2 to 4.2 | |
| 0 |
| Phosphorus (P), % | 0 to 0.015 | |
| 0 to 0.035 |
| Silicon (Si), % | 0 to 0.5 | |
| 0.15 to 0.35 |
| Sulfur (S), % | 0 to 0.015 | |
| 0 to 0.040 |
| Titanium (Ti), % | 0 to 0.4 | |
| 0 |