Grade 2 (Solution Treated) Nickel Alloy 625
Grade 2 nickel 625 is nickel 625 in the solution annealed (AT) condition. The graph bars on the material properties cards below compare grade 2 nickel 625 to: wrought nickels (top), all nickel alloys (middle), and the entire database (bottom). A full bar means this is the highest value in the relevant set. A half-full bar means it's 50% of the highest, and so on.
Mechanical Properties
Elastic (Young's, Tensile) Modulus
200 GPa 30 x 106 psi
Elongation at Break
34 %
Fatigue Strength
240 MPa 34 x 103 psi
Poisson's Ratio
0.29
Shear Modulus
79 GPa 11 x 106 psi
Shear Strength
530 MPa 77 x 103 psi
Tensile Strength: Ultimate (UTS)
790 MPa 120 x 103 psi
Tensile Strength: Yield (Proof)
320 MPa 47 x 103 psi
Thermal Properties
Curie Temperature
-200 °C -320 °F
Latent Heat of Fusion
330 J/g
Maximum Temperature: Mechanical
980 °C 1800 °F
Melting Completion (Liquidus)
1350 °C 2460 °F
Melting Onset (Solidus)
1290 °C 2350 °F
Specific Heat Capacity
440 J/kg-K 0.1 BTU/lb-°F
Thermal Conductivity
11 W/m-K 6.4 BTU/h-ft-°F
Thermal Expansion
13 µm/m-K
Electrical Properties
Electrical Conductivity: Equal Volume
1.3 % IACS
Electrical Conductivity: Equal Weight (Specific)
1.4 % IACS
Otherwise Unclassified Properties
Base Metal Price
80 % relative
Density
8.6 g/cm3 540 lb/ft3
Embodied Carbon
14 kg CO2/kg material
Embodied Energy
190 MJ/kg 83 x 103 BTU/lb
Embodied Water
290 L/kg 35 gal/lb
Common Calculations
Resilience: Ultimate (Unit Rupture Work)
220 MJ/m3
Resilience: Unit (Modulus of Resilience)
260 kJ/m3
Stiffness to Weight: Axial
13 points
Stiffness to Weight: Bending
23 points
Strength to Weight: Axial
26 points
Strength to Weight: Bending
22 points
Thermal Diffusivity
2.9 mm2/s
Thermal Shock Resistance
22 points
Alloy Composition
| Ni | 58 to 68.9 | |
| Cr | 20 to 23 | |
| Mo | 8.0 to 10 | |
| Nb | 3.2 to 4.2 | |
| Fe | 0 to 5.0 | |
| Co | 0 to 1.0 | |
| Mn | 0 to 0.5 | |
| Si | 0 to 0.5 | |
| Al | 0 to 0.4 | |
| Ti | 0 to 0.4 | |
| C | 0 to 0.1 | |
| P | 0 to 0.015 | |
| S | 0 to 0.015 |
All values are % weight. Ranges represent what is permitted under applicable standards.
Followup Questions
Further Reading
ASTM B834: Standard Specification for Pressure Consolidated Powder Metallurgy Iron-Nickel-Chromium-Molybdenum (UNS N08367) and Nickel-Chromium-Molybdenum-Columbium (Nb) (UNS N06625) Alloy Pipe Flanges, Fittings, Valves, and Parts
ASTM B443: Standard Specification for Nickel-Chromium-Molybdenum-Columbium Alloy (UNS N06625) and Nickel-Chromium-Molybdenum-Silicon Alloy (UNS N06219) Plate, Sheet, and Strip
ASTM B444: Standard Specification for Nickel-Chromium-Molybdenum-Columbium Alloys (UNS N06625) and Nickel-Chromium-Molybdenum-Silicon Alloy (UNS N06219) Pipe and Tube
ASTM B704: Standard Specification for Welded UNS N06625, UNS N06219 and UNS N08825 Alloy Tubes
ASTM B446: Standard Specification for Nickel-Chromium-Molybdenum-Columbium Alloy (UNS N06625), Nickel-Chromium-Molybdenum-Silicon Alloy (UNS N06219), and Nickel-Chromium-Molybdenum-Tungsten Alloy (UNS N06650) Rod and Bar
ASTM B705: Standard Specification for Nickel-Alloy (UNS N06625, N06219 and N08825) Welded Pipe
Welding Metallurgy and Weldability of Nickel-Base Alloys, John C. Lippold et al., 2009
ASM Specialty Handbook: Nickel, Cobalt, and Their Alloys, Joseph R. Davis (editor), 2000
Engineering Properties of Nickel and Nickel Alloys, John L. Everhart, 1971
Nickel Alloys, Ulrich Heubner (editor), 1998