Incoloy 825 seamless steel pipe Supplier. Contact us to get free quote and sample!
As a high-performance material, Incoloy 825 seamless steel pipe has become an indispensable key material in modern industry. From its unique composition and complex manufacturing process to its diverse applications and broad market prospects. Our manufacturers can produce incoloy alloy 825 uns n08825 seamless and welded pipes to meet industry requirements. Contact us market@htpipe.com for more information and a free quote!
aisi alloy 825 pipe chemical composition
Incoloy 825 seamless steel pipe is a nickel-iron-chromium alloy. Its chemical composition is carefully designed: nickel (Ni) content is 42-46%, chromium (Cr) is 19-23%, and iron (Fe) serves as a matrix element. Other elements added include molybdenum (Mo 2.5-3.5%), copper (Cu 1.5-3.0%), and niobium and titanium (Nb + Ti 0.6-1.0%).
2.4858 Incoloy 825 Pipe Mechanical Properties
| 70°F | 200°F | 400°F | 600°F | 800°F | 1000°F | 1200°F | ||
| Density | lbs/in3 | 0.294 | - | - | - | - | - | - |
| Thermal Expansion | X10-6/°F | - | 7.8 | 8.3 | 8.5 | 8.7 | 9.5 | 9.6 |
| Elastic Modulus | 103 ksi | 28.3 | 27.9 | 27.1 | 26 | 25.2 | 23.52 | 22.37 |
| Poisson Ratio | - | 0.3 | 0.3 | 0.3 | - | - | 0.367 | 0.377 |
| Thermal Conductivity | Btu-in/h·ft2·°F | - | 85 | 97.5 | 109.6 | 119.7 | 139 | 152 |
| Specific Heat | Btu/lb·°F | 0.105 | 0.11 | 0.117 | 0.123 | 0.123 | 0.13 | 0.14 |
| Yield Strength | ksi | 35 | 30 | 26 | 25 | 23 | 12 | 11 |
| Tensile Strength | ksi | 85 | 77 | 75 | 73 | 71 | 52 | 44 |
alloy n08825 steel pipe Corrosion Resistance
This alloy exhibits excellent resistance to a wide range of corrosive media, including strong acids such as sulfuric acid, phosphoric acid, and hydrofluoric acid. The high nickel content (over 40%) ensures resistance to stress corrosion cracking. The addition of molybdenum and copper enhances resistance to reducing environments, such as sulfuric and phosphoric acids. The chromium content provides resistance to oxidizing environments, such as nitric acid. The addition of titanium effectively inhibits intergranular corrosion that can occur at high temperatures.
Incoloy N08825 High-Temperature Performance
Incoloy 825 seamless steel pipe maintains excellent performance stability even in high-temperature environments. It maintains excellent mechanical properties from low to medium-high temperatures (up to 540°C). However, it should be noted that at temperatures exceeding 540°C, a "brittle phase" may form in the material, affecting its long-term performance. Therefore, in practical applications, the maximum operating temperature for pressure vessels is typically below 525°C (AS1210, AS4041) or 538°C (ASME Boiler and Pressure Vessel Standard), depending on the standards.
Application of asme alloy n08825 pipe
Oil and gas: submarine pipelines, downhole tools for acid gas wells.
Chemical equipment: sulfuric acid reactors, phosphoric acid evaporators, pickling equipment.
Nuclear industry: containers and pipelines for nuclear waste treatment systems.
Marine engineering: seawater desalination devices, heat exchangers.
Environmental protection: key components of flue gas desulfurization (FGD) systems.
incoloy alloy steel tube 825 Processability
The manufacturing process typically utilizes vacuum induction melting (VIM) or electroslag remelting (ESR) techniques to ensure molten steel purity. During hot working, solution treatment requires precise control within the temperature range of 1120-1170°C, followed by water quenching or air cooling and tempering. This is crucial for achieving a stable microstructure.
The choice of cold and hot working processes depends on the specific size and application of the pipe. For precision pipes such as capillaries, processes such as cold drawing and hot drawing are often used. For large-diameter pipes, hot working techniques such as extrusion and piercing may be required.
astm alloy n08825 tubing Welding
Welding is a critical step in pipe manufacturing and application. Welding Incoloy 825 requires the use of compatible welding consumables and strict process control to ensure that the properties of the welded joint match those of the base material and to avoid problems such as intergranular corrosion and stress corrosion cracking.
