Grade 1 Nickel 625 vs. Grade 2 Nickel 625
Both grade 1 nickel 625 and grade 2 nickel 625 are variants of the same material. They share alloy composition and many physical properties, but develop different mechanical properties as a result of different processing.
For each property being compared, the top bar is grade 1 nickel 625 and the bottom bar is grade 2 nickel 625.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 200 | |
| 200 |
| Elongation at Break, % | 33 | |
| 34 |
| Fatigue Strength, MPa | 320 | |
| 240 |
| Poisson's Ratio | 0.29 | |
| 0.29 |
| Shear Modulus, GPa | 79 | |
| 79 |
| Shear Strength, MPa | 600 | |
| 530 |
| Tensile Strength: Ultimate (UTS), MPa | 910 | |
| 790 |
| Tensile Strength: Yield (Proof), MPa | 450 | |
| 320 |
Thermal Properties
| Curie Temperature, °C | -200 | |
| -200 |
| Latent Heat of Fusion, J/g | 330 | |
| 330 |
| Maximum Temperature: Mechanical, °C | 980 | |
| 980 |
| Melting Completion (Liquidus), °C | 1350 | |
| 1350 |
| Melting Onset (Solidus), °C | 1290 | |
| 1290 |
| Specific Heat Capacity, J/kg-K | 440 | |
| 440 |
| Thermal Conductivity, W/m-K | 11 | |
| 11 |
| Thermal Expansion, µm/m-K | 13 | |
| 13 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 1.3 | |
| 1.3 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 1.4 | |
| 1.4 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 80 | |
| 80 |
| Density, g/cm3 | 8.6 | |
| 8.6 |
| Embodied Carbon, kg CO2/kg material | 14 | |
| 14 |
| Embodied Energy, MJ/kg | 190 | |
| 190 |
| Embodied Water, L/kg | 290 | |
| 290 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 250 | |
| 220 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 490 | |
| 260 |
| Stiffness to Weight: Axial, points | 13 | |
| 13 |
| Stiffness to Weight: Bending, points | 23 | |
| 23 |
| Strength to Weight: Axial, points | 29 | |
| 26 |
| Strength to Weight: Bending, points | 24 | |
| 22 |
| Thermal Diffusivity, mm2/s | 2.9 | |
| 2.9 |
| Thermal Shock Resistance, points | 25 | |
| 22 |
Alloy Composition
| Aluminum (Al), % | 0 to 0.4 | |
| 0 to 0.4 |
| Carbon (C), % | 0 to 0.1 | |
| 0 to 0.1 |
| Chromium (Cr), % | 20 to 23 | |
| 20 to 23 |
| Cobalt (Co), % | 0 to 1.0 | |
| 0 to 1.0 |
| Iron (Fe), % | 0 to 5.0 | |
| 0 to 5.0 |
| Manganese (Mn), % | 0 to 0.5 | |
| 0 to 0.5 |
| Molybdenum (Mo), % | 8.0 to 10 | |
| 8.0 to 10 |
| Nickel (Ni), % | 58 to 68.9 | |
| 58 to 68.9 |
| Niobium (Nb), % | 3.2 to 4.2 | |
| 3.2 to 4.2 |
| Phosphorus (P), % | 0 to 0.015 | |
| 0 to 0.015 |
| Silicon (Si), % | 0 to 0.5 | |
| 0 to 0.5 |
| Sulfur (S), % | 0 to 0.015 | |
| 0 to 0.015 |
| Titanium (Ti), % | 0 to 0.4 | |
| 0 to 0.4 |