Incoloy 926 Alloy Steel Pipe, UNS N08926,W.Nr.1.4529, X1NiCrMoCu

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April 19, 2024

Incoloy 926 Alloy Steel Pipe: Unparalleled Corrosion Resistance and High Performance

Incoloy 926, also known as UNS N08926 or W.Nr. 1.4529, is a highly alloyed stainless steel that is primarily used in the production of wrought products. It falls under the category of superaustenitic stainless steels and is widely recognized in the industry as Alloy 926. This material possesses a high tensile strength, making it classified as a nickel alloy according to American standards.

One of the key features of Incoloy 926 is its exceptional resistance to various forms of corrosion, including intercrystalline, pitting, and stress corrosion. It is highly resistant to aggressive chemicals such as salt, sea water, chloride, sulfuric acid, phosphoric acid, and other concentrated liquids and gases. Additionally, this stainless steel grade can withstand elevated temperatures while maintaining its mechanical properties.

In addition to its high nickel and chromium content, Incoloy 926 also contains significant amounts of molybdenum and nitrogen. These elements play a crucial role in enhancing the material’s properties. The presence of molybdenum and nitrogen helps limit the formation of intermetallic phases, which can negatively impact the performance of the alloy. Furthermore, these elements contribute to improving the impact resistance of Incoloy 926.

Incoloy 926 (UNS N08926/W.Nr. 1.4529) is a highly versatile stainless steel grade that offers excellent corrosion resistance and mechanical properties. Its unique composition makes it suitable for a wide range of applications in various industries. Whether it’s facing harsh environments or high temperatures, Incoloy 926 proves to be a reliable and durable material choice.

As a leading supplier of Incoloy pipes, abtersteel takes pride in manufacturing and producing different sizes of Incoloy 926 welded pipes and tubes.. In this article, we will delve into the benefits and features of Incoloy 926 alloy steel pipes, including its specifications and applications.

Specifications of Incoloy 926 Alloy Steel Pipe:

UNS N08926: Incoloy 926 is designated as UNS N08926, which is a high-performance super-austenitic stainless steel. This designation ensures that the alloy meets specific chemical composition and mechanical property requirements, making it suitable for various applications.

W.Nr. 1.4529: Incoloy 926 is also known by its European standard designation, W.Nr. 1.4529. This number indicates the specific alloy composition and properties, ensuring consistency and compatibility in different regions.

Features of Incoloy 926 Welded Pipe & Tube:

The main features of Incoloy 926 (N08926) nickel-based alloy are as follows:

High Resistance to Pitting and Crevice Corrosion: Incoloy 926 demonstrates exceptional resistance to pitting and crevice corrosion in halide media and acidic media containing H2S.

Effective Resistance to Chloride Ion Stress Corrosion Cracking (SCC): This alloy effectively resists chloride ion stress corrosion cracking, making it suitable for practical applications.

Resistance to Various Corrosions: Incoloy 926 exhibits resistance to various corrosive environments, including oxidation and reduction conditions.

Enhanced Mechanical Performance: Compared to Cronifer 1925 LC-Alloy 904L, Incoloy 926 offers improved mechanical performance.

Improved Metallurgical Stability: Incoloy 926 demonstrates enhanced metallurgical stability when compared to Ni18 alloys.

Certified for Pressure Vessel Manufacturing: Incoloy 926 is certified for pressure vessel manufacturing, meeting the VdTUV-196 ~ 400 °C and ASME certification requirements.

Superior Corrosion Resistance: Incoloy 926 welded pipes and tubes are specifically designed to withstand corrosive environments. The alloy’s high nickel and chromium contents, combined with the addition of 6% molybdenum and nitrogen, provide excellent resistance to a wide range of corrosive media, including acids, chlorides, and seawater.

High Strength and Durability: Incoloy 926 welded pipes and tubes exhibit high strength and durability, making them suitable for applications where reliability is crucial. The alloy’s composition and metallurgical structure contribute to its exceptional mechanical properties, allowing it to withstand high-pressure and high-temperature conditions.

Advanced Manufacturing Techniques: abtersteel ensures the highest quality standards by carefully selecting raw materials from reputable suppliers. The Incoloy 926 strip or plate used to form the welded pipes and tubes undergoes a rigorous quality control process. The most advanced splitting and welding technology is employed to manufacture each Incoloy 926 welded pipe and tube, ensuring precision and consistency.

Solution Annealing Capability: For applications that require higher demands, abtersteel offers solution annealed Incoloy 926 welded pipes and tubes. Solution annealing involves heating the pipes or tubes to a specific temperature and holding them at that temperature to achieve a uniform microstructure. This process enhances the alloy’s mechanical properties and corrosion resistance.

Grade
ASTM / AISI	DIN	JIS	GB
Incoloy 926	1.4529	/	/

Mechanical Properties
Heat Treatment Temperature	σb (Mpa)	σs (Mpa)	δ%	HB	HRB	HV
°C	≥	≥	≥	≤	≤	≤
1150-1200	650	295	35	/	/	/

Physical Properties

Density	g/cm3	8.03
Density	lb/in.3	0.29
Melting Range	°F	2410 – 2550
Melting Range	°C	1320 – 1400

Mechanical Properties

Condition & Size	Tensile Strength	Yield Strength (0.2% Offset)	Elongation	Reduction of Area	Hardness
Condition & Size	MPa, min	MPa, min	%, min	%, min	Rockwell B, max
Solution Annealed	650	295	35	…	…

*Mechanical Properties According to ASTM B673 & ASTM B674*

General mechanical and physical properties of 1.4529, X1NiCrMoCuN25-20-7 grade

Tensile strength, Rm: 650 – 850 MPa
Yield point, RP0,2: >300 MPa
Elongation, A > 40%
Modulus of elasticity, E: 195 GPA
Hardness: <250 HB
Heat capacity, cp20℃: 450 J * kg-1 * K-1
Heat conductivity, λ: 12 W * m-1 * K-1

Applications of Incoloy 926

Incoloy 926 (N08926) finds applications in various industries due to its exceptional corrosion resistance and high mechanical performance. Some of the common applications include:

Desalination Plants: Incoloy 926 alloy steel pipes are used in desalination plants, where they transport seawater or brine solutions. The corrosion resistance and high performance of this alloy ensure the efficiency and reliability of the desalination process.

Pulp and Paper Industry: It is utilized in various bleaching devices in the pulp and paper industry.

Chemical Processing: Incoloy 926 is suitable for resin production devices, reaction containers for drugs, and piping in chemical processing plants.

Firefighting and Seawater Purification Systems: It is employed in firefighting systems, seawater purification systems, hydraulic and perfusion piping.

Marine Industry: Incoloy 926 alloy steel pipes are utilized in marine environments, such as offshore platforms, ships, and submarines. Their resistance to corrosion in seawater and harsh marine conditions ensures the longevity and reliability of the piping systems.

Acid Gas Production: It finds applications in pipes, joints, and airflow systems in the production of acid gases.

Flue Gas Desulfurization Systems: Incoloy 926 is utilized in parts for flue gas desulfurization systems.

Phosphoric Acid Production: It is employed in evaporators, heat exchangers, filters, mixers, and other equipment used in the production of phosphoric acid.

Sulfuric Acid Separation and Condensation: Incoloy 926 is used in systems for sulfuric acid separation and condensation.

Power Plant Cooling-Water Pipe Systems: It finds applications in cooling-water pipe systems in power plants.

Corrosive Chemical Transportation: Incoloy 926 is suitable for storage tanks used in the transportation of corrosive chemicals.

Organic Production Equipment: It is utilized in halogen acid catalyzed organic production equipment.

Incoloy 926 alloy steel pipes are widely used in a range of industries and applications, including:

Oil and Gas Industry: Incoloy 926 alloy steel pipes are utilized in offshore and onshore oil and gas production facilities, where they transport corrosive fluids, such as oil, gas, and seawater. Their superior corrosion resistance and high strength make them suitable for these demanding environments.

Chemical Processing: These steel pipes are employed in chemical processing plants, where they transport corrosive chemicals, acids, and solvents. The corrosion resistance and resistance to pitting and crevice corrosion of Incoloy 926 ensure the reliability and longevity of the piping systems.

Power Generation: Incoloy 926 alloy steel pipes find application in power generation facilities, including nuclear power plants, where they transport high-temperature and high-pressure fluids. Their resistance to corrosion, pitting, and crevice corrosion, along with their high strength, make them suitable for these demanding applications.

Incoloy 926 alloy steel pipes offer unparalleled corrosion resistance, high strength, and excellent performance in demanding environments. With their resistance to corrosion, pitting, and crevice corrosion, along with their high weldability and wide range of applications, Incoloy 926 alloy steel pipes provide a reliable and efficient solution for fluid transportation. Whether in the oil and gas industry, chemical processing plants, desalination facilities, power generation, or marine applications, Incoloy 926 alloy steel pipes are a top choice for industries that prioritize durability, reliability, and high performance.

Q1: What is the corrosion resistance of Incoloy 926 (N08926)?
A1: Incoloy 926 exhibits high resistance to pitting and crevice corrosion in halide media and acidic media containing H2S. It is also resistant to chloride ion stress corrosion cracking (SCC) and various corrosive environments in both oxidizing and reducing conditions.Q2: What are the mechanical properties of Incoloy 926 (N08926)?
A2: Incoloy 926 offers slightly better mechanical properties compared to Cronifer 1925 LC-Alloy 904L. It has enhanced metallurgical stability and is certified for pressure vessel manufacturing.Q3: What are the applications of Incoloy 926 (N08926)?
A3: Incoloy 926 finds applications in various industries, including reverse osmosis seawater desalination, pulp and paper industry, chemical processing, firefighting and seawater purification systems, marine engineering, acid gas production, flue gas desulfurization systems, phosphoric acid production, sulfuric acid separation and condensation, power plant cooling-water pipe systems, corrosive chemical transportation, organic production equipment, and more.

Q4: Is Incoloy 926 suitable for high-temperature applications?
A4: Yes, Incoloy 926 is designed to maintain excellent corrosion resistance in high-temperature environments. It can be used in temperatures ranging from -196°C to 400°C.

Q5: How does Incoloy 926 compare to other nickel-based alloys?
A5: Incoloy 926 offers comparable or even superior corrosion resistance to materials like Hastelloy and titanium. It exhibits better heat resistance than typical chrome-nickel stainless steels and has oxidation resistance equivalent to higher-grade alloys used at temperatures up to 1900 degrees Fahrenheit (1038 °C).