Nickel Incoloy Alloy 825 UNS N08825
As a leading supplier and manufacturer in China, GNEE Steel provides cost-effective nickel-based alloy products.
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UNS N08825 Incoloy 825 is a nickel-iron-chromium alloy that contains small amounts of titanium, copper, and molybdenum. Incoloy® 825's chemical composition provides great resistance to many corrosive environments, such as pitting, crevice corrosion, intergranular corrosion, and stress- corrosion cracking. Incoloy 825 nickel alloy has good mechanical properties from moderate to high temperatures, with a hot- working range of 1600 to 2150º F. Alloy 825 also maintains good weldability for all conventional processes.
Chemical Composition:
| Cr | Ni | Mo | Co | Nb (+Ta) | Ti | W | Cu | C | Mn | N | Si | P | S | Fe | Al | |
| Min | 19.50 | 38.00 | 2.50 | 0.60 | 1.50 | 22.00 | ||||||||||
| Max | 23.50 | 46.00 | 3.50 | 1.20 | 3.00 | 0.05 | 1.00 | 0.50 | 0.03 | 0.20 |
Mechanical Properties:
| 0.2% Proof Stress | 241 N/mm2 | 35 ksi |
| Tensile Strength | 590 N/mm2 | 86 ksi |
| Elongation, 5.65√S0 and 4D | 30% | |
| Reduction of Area | 40% | |
| Hardness (Brinell) | 327 max. |
Physical Properties:
| Density (Kg.m-1) | 81.4 |
| Magnetic Permeability (20°C) | 1.005 |
| Curie Temperature (°C) | -196 |
| Young's Modulus (N/mm2) | 196 |
| Specific Heat, 20°C (J/(g.K)) | 440 |
| Specific Electrical Resistance, 20°C (Ω-m) | 0.00113 |
| Thermal conductivity, 20°C (W/(m.K)) | 10.8 |
| Mean coefficient of thermal expansion, 20-100°C (/K) | 14.1 x 10-6 |
Incoloy 825 alloy offers users a number of benefits:
- Excellent resistance to both reducing and oxidizing acids like sulfuric and phosphoric
- Helps avoid stress-corrosion cracking
- Stops localized attacks such as pitting and crevice corrosion
- High level of resistance to variety of oxidizing substances such as nitric acid, nitrates, and oxidizing salt
Incoloy 825 is in use in a number of industries and applications including:
- Chemical processing
- Pollution control
- Calorifiers
- Oil and gas recovery
- Hot vessels for food, water, and seawater
- Acid production
- Pickling tank heaters, tanks, and equipment
- Nuclear fuel reprocessing
- Radioactive waste handling
- Marine exhaust systems
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