Incoloy 825* * Trade name of Special Metals Group of Companies
W.NR 2.4858
UNS N08825
AWS 022
UNS N08825
AWS 022
Incoloy 825 is a Nickel-Iron-Chromium alloy with additions
of
Molybdenum and Copper. It has excellent resistance to both reducing
and oxidising acids, to stress-corrosion cracking and to localised pitting and crevice corrosion. It is also especially resistant to sulphuric and phosphoric acids.
Molybdenum and Copper. It has excellent resistance to both reducing
and oxidising acids, to stress-corrosion cracking and to localised pitting and crevice corrosion. It is also especially resistant to sulphuric and phosphoric acids.
Applications include:
- Chemical Processing
- Nuclear Fuel Reprocessing
- Acid Production
- Pickling Equipment
| Approximate Chemical Composition | |
| Ni | 38 - 46% |
| Fe | 22% min |
| Cr | 19.5 - 23.5% |
| Mo | 2.5 - 3.5% max |
| Cu | 1.5 - 3% |
| Ti | 0.6 - 1.2% |
| DENSITY | 8.14 g/cm3 | 0.294 lb/in3 |
| MELTING POINT | 1400oC | 2550oF |
| COEFFICIENT OF EXPANSION | 14.0 µm/m °C ( 20 - 100°C) |
7.8 x 10-6 in/in
°F ( 70 - 212°F) |
| MODULUS OF RIGIDITY | 75.9 kN/mm2 | 11009 ksi |
| MODULUS OF ELASTICITY | 196 kN/mm2 | 28428 ksi |
| CONDITION OF SUPPLY | HEAT TREATMENT (AFTER FORMING) |
| Annealed/Spring Temper | Stress relieve at 450 - 470oC (840 - 880oF) for 30-60 minutes and air cool. |
| CONDITION |
APPROX TENSILE STRENGTH |
APPROX SERVICE TEMPERATURE |
||||
| Annealed | 600-800 N/mm2 | 87-116 ksi | -100o to +250oC | -145o to +480oF | ||
| Spring Temper | 800-1100 N/mm2 | 116-159 ksi | -100o to +250oC | -145o to +480oF | ||
| STANDARDS | |
| BS 3076 NA 16 | ASTM B425 |
