Incoloy 825 tubing and pipes are in the category of nickel-iron and chromium alloy form, which are made to endure severe corrosion by harsh chemicals and a high-temperature environment. They are commonly annealed and cooled under controlled temperatures in order to maintain desirable mechanical strength and resistance to corrosion. Alloy 825 is also an alloy that works well in oxidizing and reducing environments and can withstand corrosion by acids such as sulfuric, phosphoric, and nitric acids. In addition, it is resistant to stress corrosion cracking and localized corrosion due to chlorides and this is one of the reasons why it makes it an excellent option in demanding industrial uses. In high temperatures, it retains its mechanical strength, suitable to be used in high-temperature application scenarios.
Both Incoloy 825 seamless and welded pipes provide excellent strength and ductility performance from low to high temperatures, though dependent on the type of product and heat treatment performed. The controlled low carbon content and titanium stabilization of the alloys enable their weldable components to work under corrosive conditions without requiring any heat treatment after welding. The high resistance to carburizing, nitriding, and sulfidizing environments of the Incoloy 825 pipes and tubes can be easily interpreted as a longer working life and minimized maintenance and repair cycles, thereby making it an economical solution under stringent industry requirements.
Table of Contents
- Specifications of Incoloy 825 Pipe & Tube
- Grade 825 Incoloy Pipes & Tubes Chemical Composition
- Incoloy Alloy 825 Pipe & Tube Mechanical Properties
- Alloy 825 Pipes and Tubes Equivalent Grades
- Inconel 825 Pipe Dimensions Chart
- Alloy 825 Pipe Weight Chart
- Types of Incoloy 825 Pipes & Tubes
- Manufacturing Process of Incoloy 825 Pipes & Tubes
- Applications of Incoloy 825 Pipes & Tubes
- Frequently Asked Questions (FAQ)
Specifications of Incoloy 825 Pipe & Tube
| Parameter | Specification Details |
| Seamless Pipe & Tube Standard | ASTM B423 / ASME SB423 |
| Welded Pipe Standard | ASTM B705 / ASME SB705 |
| Welded Tube Standard | ASTM B704 / ASME SB704 |
| Industry Standards | ASTM, ASME, and API |
| Manufacturing Type | Seamless / ERW / Welded / Fabricated |
| Pipe Size Range | 15 NB up to 825 NB |
| Tube Size Range | 1 mm OD up to 254 mm OD (0.2 to 20 mm thickness) |
| Schedules | SCH 5S, 10S, 10, 20, 40S, 40, STD, 60, 80S, 80, XS, 100, 120, 140, 160 & XXS |
| Length | Single Random, Double Random, Cut Length, & Required Length |
| End Connections | Plain End, Beveled End, Threaded |
Grade 825 Incoloy Pipes & Tubes Chemical Composition
| Grade | Ni | Cr | Fe | Cu | Ti | Mn | Si | C | Al | S |
| Incoloy 825 | 38.0�46.0 | 19.5�23.5 | 22.0 min | 1.5�3.0 | 0.6�1.2 | 1.0 max | 0.5 max | 0.05 max | 0.2 max* | 0.03 max |
Incoloy Alloy 825 Pipe & Tube Mechanical Properties
| Property | Metric Value | Imperial Value |
| Density | 8.14 g/cm� | 0.294 lb/in� |
| Melting Point | 1400 �C | 2550 �F |
| Tensile Strength (min) | 550 MPa | 80,000 psi |
| Yield Strength (0.2% Offset) | 220 MPa | 32,000 psi |
| Elongation at Break (min) | 30% | 30% |
Alloy 825 Pipes and Tubes Equivalent Grades
| Grade | UNS | Werkstoff Nr. | JIS | AFNOR | BS | GOST | EN / DIN |
| Incoloy 825 | N08825 | 2.4858 | NCF 825 | NFE30C20DUM | NA 16 | ??703 / XH38BT | NiCr21Mo |
Inconel 825 Pipe Dimensions Chart
| NPS (in) | OD (in) | OD (mm) | Wall (in) | Wall (mm) | Weight (kg/m) |
| 1/2" | 0.840 | 21.3 | 0.109 | 2.77 | 1.27 |
| 3/4" | 1.050 | 26.7 | 0.113 | 2.87 | 1.69 |
| 1" | 1.315 | 33.4 | 0.133 | 3.38 | 2.50 |
| 1 1/2" | 1.900 | 48.3 | 0.145 | 3.68 | 4.05 |
| 2" | 2.375 | 60.3 | 0.154 | 3.91 | 5.44 |
| 3" | 3.500 | 88.9 | 0.216 | 5.49 | 11.29 |
| 4" | 4.500 | 114.3 | 0.237 | 6.02 | 16.07 |
| 6" | 6.625 | 168.3 | 0.280 | 7.11 | 28.26 |
| 8" | 8.625 | 219.1 | 0.322 | 8.18 | 42.55 |
| 10" | 10.750 | 273.0 | 0.365 | 9.27 | 60.31 |
| 12" | 12.750 | 323.8 | 0.406 | 10.31 | 79.73 |
Alloy 825 Pipe Weight Chart
| NPS (in) | Outside Diameter (mm) | Sch 40 Weight (kg/m) | Sch 80 Weight (kg/m) |
| 1/2" | 21.3 | 1.27 | 1.62 |
| 3/4" | 26.7 | 1.69 | 2.20 |
| 1" | 33.4 | 2.50 | 3.24 |
| 1 1/2" | 48.3 | 4.05 | 5.41 |
| 2" | 60.3 | 5.44 | 7.48 |
| 3" | 88.9 | 11.29 | 15.27 |
| 4" | 114.3 | 16.07 | 22.32 |
| 6" | 168.3 | 28.26 | 42.56 |
| 8" | 219.1 | 42.55 | 64.63 |
| 10" | 273.0 | 60.31 | 81.53 |
| 12" | 323.9 | 79.73 | 108.97 |
Types of Incoloy 825 Pipes & Tubes
Alloy 825 ERW Pipe
Incoloy 825 Seamless Pipe
Incoloy Alloy 825 Welded Pipe
Incoloy� Alloy 825 ERW Tube
Nickel Alloy 825 Welded Tube
UNS N08825 Seamless Tube
Manufacturing Process of Incoloy 825 Pipes & Tubes
Incoloy 825 pipes and tubes are made through controlled manufacturing procedures which result in high resistance against corrosion, oxidation and high temperatures. Their nickel-iron-chromium structure, coupled with molybdenum and copper provides quality performance and extended serviceability in harsh conditions.
- Raw Material Selection: Pure nickel, iron, chromium, molybdenum and copper are chosen and alloyed accurately to meet the necessary chemical composition and resistant to corrosion properties.
- Melting and Alloying: The melting of the alloy is done through the application of advanced techniques like electric arc furnace or vacuum induction melting in order to achieve homogeneous composition, low impurities and higher structural integrity.
- Hot Working and Forming: The molten alloy will be hot-worked to billets and then additional processing in the form of pipes and tubes is undertaken through extrusion or pilgering in order to attain the required size and thickness of the wall.
- Heat Treatment: Annealing of solutions is done to enhance resistance to corrosion, deform internal stresses, and maximize high-temperature and chemical service mechanical properties.
- Finalization and Quality Control: The last processes are the straightening, surface finishing, non-destructive testing, dimensional test, and chemical analysis to meet the international standards.
Applications of Incoloy 825 Pipes & Tubes
Incoloy 825 pipes and tubes find application in industries that have special resistance to corrosion, stress cracking, and high temperature applications. They have a high level of stability and durability, thus they can be used in harsh and long service conditions.
- Chemical and Petrochemical: Applied in heat exchangers, reactors, and piping systems in which acidic and corrosive media are involved because of a very good resistance to sulfuric and phosphoric acids.
- Oil and Gas Industry: It is used in sour gas service, offshore piping, and processing units where resistance to both chloride stress corrosion cracking and oxidation are required.
- Power Generation Plants: Applied in boiler parts, high-pressure heat exchangers, and condensers that are used at high operating temperatures and pressure.
- Maritime and Offshore Engineering: Applicable in seawater systems, cooling lines, and offshore platforms due to high-resistance to both pitting and crevice corrosion.
- Waste Treatment and Pollution Control: Applied in flue gas scrubbers, waste processing system and chemical neutralization system that are subjected to harsh chemical conditions.
- Pharmaceutical and Food Processing: Used in high-purity piping systems where corrosion resistance, cleanliness and stability of material are important.
Frequently Asked Questions (FAQ)
The Incoloy 825 Pipes and tubes are mostly used in chemical processing, oil and gas, power plants, and marine applications where corrosion and high temperatures are present.
It offers excellent resistance to acids, oxidation, and corrosion, making it suitable for harsh environments.
Yes, Incoloy 825 has good resistance to chloride stress corrosion cracking.
Incoloy 825 can typically operate at temperatures up to about 540�C (1000�F).
Yes, it can be welded using standard welding methods without special difficulty.
Other types of Incoloy Alloy 825 Pipes & Tubes
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