Beijing Hownew Energy Technology Group Co., Ltd vincent@hownewenergy.com 86-10-53681027
Incoloy 825 is a titanium-stabilized nickel-iron-molybdenum-copper corrosion-resistant alloy that effectively resists both uniform and localized corrosion, making it widely used in the chemical, energy, and hydrometallurgy sectors. The alloy also exhibits good toughness and performs well in the atmosphere, though it is susceptible to very slight pitting in humid conditions. It is resistant to freshwater corrosion and performs well in flowing seawater, but can develop pitting under stagnant or contaminated conditions.
The high nickel content of Incoloy 825 provides effective resistance to stress corrosion cracking. It exhibits good corrosion resistance in various media, such as sulfuric acid, phosphoric acid, nitric acid, and organic acids, as well as alkaline metals like sodium hydroxide, potassium hydroxide, and hydrochloric acid solutions. Incoloy 825 demonstrates high overall performance in diverse corrosion environments found in nuclear fuel dissolution systems, where it handles sulfuric acid, nitric acid, and sodium hydroxide in the same equipment.
Corresponding Grade
| high-temperature new name | High temperature old name | New name for corrosion resistance | Old name for corrosion resistance | China |
| NS1402 | NS142 | 0Cr21Ni42Mo3Cu2Ti | ||
| Japan JIS | American ASTM | American UNS、SAE | German DIN | Europe EN |
| ncf825 | Incoloy825 | No8065,No8825 | 2.4858 | MiCr21MC |
chemical composition
| % | C | Si | Mn | F | S | Cr | Ni | Mo | N | Cu | Fe |
| Min | — | — | 一 | — | — | 19.5 | 38 | 2.5 | 0.6 | 1.5 | Balance |
| ax | 0.05 | 0.5 | 1 | 0.04 | 0.03 | 23.5 | 46 | 3 | 1.2 | 3 | 一 |
physical property
|
Density g/cm |
Thermal conductivity /w/(m.k) | resistivity | Specific heat capacity | linear expansion coefficient |
| 0~1000℃ | C)/(Ω,mm2/m | C)/kg/(kg.k)℃ | /(10-6/k) | |
| 20℃ | 200~600℃ | 20~1000℃ | ||
| 8.09 | 14~28 | 1.07 | 580~800 | 12.7~17.5 |
| Temperature 0/℃ | room temperature | |||
| Hardness HBS | 200 |
Application Areas:
- Heating pipes, containers, baskets, and chains used in sulfuric acid pickling plants.
- Seawater cooling heat exchangers, marine product pipeline systems, and pipelines in acidic gas environments.
- Heat exchangers, evaporators, washing, and dipping pipes used in phosphoric acid production.
- Air heat exchangers in petroleum refining.
- Food engineering.
- Chemical processes.
- Flame-resistant alloys for oxygen-enriched environments.
