Incoloy 825 Seamless Tubes Manufacturer and Supplier in Thailand

Incoloy 825 Seamless Tubes are high-performance nickel-iron-chromium alloy tubes known for their exceptional resistance to corrosion in aggressive environments such as chemical processing, marine, and oil & gas industries. Thaida Stainless Steel Manufacturing (Thailand) Co., Ltd. is a trusted supplier of Incoloy 825 Seamless Tubes based in Chon Buri, Thailand. We specialise in manufacturing tubes in various sizes and grades, compliant with international standards like W.Nr 2.4858 and UNS N08825. Backed by years of tube manufacturing experience, our offerings include custom cut-to-length services and bulk supply to meet diverse industrial needs. Our Incoloy tubes are engineered for superior strength, durability and consistent performance, making them a smart choice for engineers and industries that demand high-quality, corrosion-resistant solutions.

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Product Summary : Incoloy 825 Seamless Tubes

Incoloy 825 seamless tubes are high-performance tubes made from an alloy of nickel-iron-chromium and molybdenum, known for their superior corrosion resistance. These tubes, also referred to as UNS N08825 tubing, are ideal for use in harsh environments where resistance to corrosive conditions is critical. It offers exceptional structural integrity, and it is perfect for heat-exchanger systems and other industrial applications. The UNS N08825 material ensures its durability and reliability, even in the most demanding conditions. These tubes are designed to provide long-lasting performance in corrosive environments, making them the preferred choice for industries like chemical, petrochemical, and marine.

Advantages of Incoloy 825 Seamless Tubes

Learn what sets Incoloy 825 Seamless Tubes apart; our table outlines their top performance and usage advantages.

Incoloy 825 provides outstanding resistance to both reducing and oxidizing acids, such as sulfuric and phosphoric acids. This makes it ideal for use in chemical processing and pollution control equipment.

The nickel-rich composition ensures excellent resistance to stress corrosion cracking, especially in chloride-containing environments. This enhances the durability of the tubes under mechanical stress.

These tubes maintain their strength and structural integrity at elevated temperatures. They are suitable for applications involving heat exchangers, condensers, and high-temperature chemical reactions.

Incoloy 825 tubes are easy to fabricate using standard techniques and offer excellent weldability without compromising corrosion resistance. This simplifies manufacturing and installation processes.

Due to their robust performance and resistance to harsh environments, Incoloy 825 tubes require minimal maintenance. This translates to reduced downtime and cost savings over time.

Why Choose Thaida for Your Incoloy 825 Seamless Tubes ?

Choose Thaida for top-grade Incoloy 825 seamless tubes, as it is available in stock with various diameters, finishes, customised thickness, and custom sizes to meet the exact needs of the customers. With international certifications (ASTM, ASME), we ensure the best quality, consistent performance, and on-time delivery at 100% factory price. With a team of skilled professionals and a quick and easy replacement process, we provide full technical support, a convenient online ordering system, and a commitment to complete customer satisfaction guaranteed with reliable warranty services.

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Specification of Incoloy 825 Seamless Tubes

This table covers essential specifications like size range, outer diameter, thickness, length, schedule and surface finish.

Standard Specification	ASTM B163 UNS N08825, / ASME SB 163
Shapes	Incoloy 825 Round, Rectangular, Square
Manufacturing Type	Seamless
Delivery Condition	Annealed and Pickled (AP), Polished, Bright Annealed (BA), Cold Drawn, MF
Swg & Bwg	10 Swg, 12 Swg, 14 Swg, 16 Swg, 18 Swg, 20 Swg
Thickness Range	SCH 5, SCH 10, SCH 40, SCH 80, SCH 80S, SCH 160, SCH XXH, SCH XXS, SCH XS
Standard	SUS, JIS, AISI, ASTM, GB, DIN, EN
Value Added Services	Cutting, Beveling, Threading, Polishing (Electro & Commercial), Draw & Expansion as per required Size & Length, Destructive and Non-Destructive Testing, Ultrasonic Testing, Annealed & Pickled Bending
END	Plain End, Beveled End
Marking	Specification, Material Grade, Nominal Size, Schedule or Wall Thickness, Method of Manufacturing (Seamless), Heat Number, Manufacturer’s Name or Custom Logo (on request) Marked Pipes Sample: SB 163 UNS N08825 12" NB SCH 40S SEAMLESS HEAT NO. XXXX
Test Certificate	DFARS compliant, EN 10204/3.1B, EN 10204 3.1 and EN 10204 3.2 Material Test Certificates (MTC), 100% Radiography Test Report, Raw Materials Certificate, Third Party Inspection Report, Fumigation Certificates, Heat Treatment Charts, HS Code Commercial Invoice, Form A for GSP, Manufacturer Test Certificate, Moisture Testing, Surface Roughness Measurement, Laboratory Test Certificate from Govt. Approved Lab
ASTM B163 Alloy 825 Tubing Packaging	Packed in PE Fabric Bundles or ply wooden box wrapped in plastic or Standard seaworthy export packing or as per customers' request

Mechanical Properties of Incoloy 825 Seamless Tubes

Incoloy 825 Seamless Tubes mechanical properties like tensile strength and yield are detailed in the table below.

Element	Density	Melting Point	Tensile Strength	Yield Strength (0.2%Offset)	Elongation
825	8.14 g/cm3	1400 °C (2550 °F)	Psi – 80,000 , MPa – 550	Psi – 32,000 , MPa – 220	30 %

Chemical Composition of Alloy 825 Seamless Tubes

Alloy 825 Seamless Tubes chemical composition table highlights all major alloying elements and their percentage ranges.

Alloy	C	Mn	Si	S	Cu	Fe	Ni	Cr	Al	Ti
825	0.05 max	1.00 max	0.05 max	0.03 max	1.50 - 3.00	22.00 min	38.00 - 46.00	19.50 - 23.50	0.02 max	0.06 - 1.20

Equivalent of Incoloy 825 Seamless Tubes

The table highlights Incoloy 825 Seamless Tubes equivalent grades used across ASTM, DIN, and other standards.

ALLOY	WERKSTOFF NR./ DIN	UNS	JIS	BS	GOST	AFNOR	EN	OR
Incoloy 825	2.4858	N08825	NCF 825	NA 16	ЭП703	NFE30C20DUM	NiCr21Mo	XH38BT

Incoloy 825 Seamless Tubes Manufacturing Process

There are 5 steps involved in the Incoloy 825 seamless tube manufacturing process which are given below. Every step of production is precisely controlled to comply with stringent industry standards.

1. Raw Material Selection

High-quality incoloy billets and strips are carefully selected for superior strength and corrosion resistance.

2. Tube Formation
The selected raw material is formed into tubes using seamless extrusion methods, depending on the application.

3. Heat Treatment
tubes undergo required controlled heat treatment to enhance mechanical properties and relieve internal stresses.

4. Cold Working and Finishing
After heat treatment, tubes are cold-worked for better surface finish, dimensional accuracy and improved strength.

5. Quality Control and Testing
Every tube is thoroughly inspected and tested to ensure it meets international quality standards for performance and reliability.

Applications of Incoloy 825 Seamless Tubes

Incoloy 825 seamless tubes are primarily used in the chemical processing industry, which accounts for the highest consumption due to the alloy’s exceptional resistance to corrosive environments. These tubes are used in equipment such as heat exchangers, piping systems, and reactor vessels that handle sulfuric acid, phosphoric acid, and other aggressive chemicals. In oil and gas industries, they are installed in offshore piping, downhole tubing, and gas scrubbers, where chloride-induced corrosion is a concern. Incoloy 825 seamless tubes are also employed in marine exhaust systems, pollution control devices, and nuclear fuel reprocessing, where durability and corrosion resistance are critical.

Power Generation & Heat Exchange

Chemical and Petrochemical Industry

Oil and Gas Industry

Aerospace & Defense

Automotive and Transportation

Construction and Architecture

Food and Beverage Industry

Marine & Shipbuilding

Pharmaceutical & Biotechnology

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FAQ's

What industries commonly use Incoloy 825 Seamless Tubes?

Incoloy 825 seamless tubes are widely used in industries such as chemical processing, oil and gas, power generation, and nuclear systems for their outstanding resistance to corrosion and high temperatures. It is ideal for use in heat exchangers, reactors, and piping systems due to its excellent resistance to stress corrosion cracking and general corrosion in both hot and cold environments.

How does Incoloy 825 differ from Incoloy 800 or 800HT?

Incoloy 825 provides excellent corrosion resistance in acidic and chloride-rich environments due to its molybdenum, copper, and titanium content, making it ideal for chemical and marine applications. In contrast, Incoloy 800, 800H, and 800HT are designed for superior high-temperature performance in furnaces and heat exchangers, with 800HT offering the best creep resistance from its higher aluminum and titanium levels. While Incoloy 825 excels in corrosion resistance, the 800 series outperforms it in high-temperature strength and stability.

What are the main components of Incoloy 825 Seamless Tubes?

Incoloy 825 seamless tubes are composed mainly of nickel, iron, and chromium, with added molybdenum, copper, and titanium for enhanced performance. This combination provides excellent resistance to both oxidizing and reducing acids, protecting against pitting, crevice, and stress corrosion cracking. Titanium further stabilizes the alloy, ensuring strong resistance to intergranular corrosion in demanding environments.

How does Incoloy 825 perform under high-pressure environments?

Incoloy 825 exhibits high mechanical strength and excellent corrosion resistance, maintaining performance under high-pressure and high-temperature conditions up to 538°C (1000°F). Its nickel-iron-chromium base, with added molybdenum, copper, and titanium, offers strong resistance to pitting, crevice, and stress corrosion cracking. This makes it ideal for pressure vessels, chemical process equipment, and oil and gas piping in corrosive environments.

What is incoloy 825 tube?

Incoloy 825 tubes are made from a nickel-iron-chromium alloy with molybdenum, copper, and titanium, offering excellent resistance to oxidizing and reducing acids. It provides strong protection against pitting, crevice corrosion, and chloride-induced stress corrosion cracking, while maintaining good mechanical strength, thermal stability, and weldability. Titanium ensures stability against intergranular corrosion, even after welding.

What is the chemical composition of incoloy 825 tube?

Incoloy 825 tubes consist of a nickel-iron-chromium alloy containing approximately 38.0–46.0% nickel, 19.5–23.5% chromium, and a minimum of 22.0% iron. The alloy also includes 2.5–3.5% molybdenum, 1.5–3.0% copper, and 0.6–1.2% titanium for enhanced corrosion resistance. Minor elements such as carbon (0.05% max), manganese (1.0% max), silicon (0.5% max), sulfur (0.03% max), and aluminum (0.2% max) are present in trace amounts.

What is the difference between incoloy 925 and 825 tube?

The key difference between Incoloy 925 and Incoloy 825 lies in their strengthening methods, Incoloy 925 is a precipitation-hardened alloy offering much higher strength, while Incoloy 825 is solid-solution strengthened for better formability and corrosion resistance. Incoloy 925 is used in high-pressure oil and gas applications, whereas Incoloy 825 is preferred for chemical processing, seawater systems, and heat exchangers due to its excellent resistance to acidic and marine environments.

What is the hardness of incoloy 825 tube?

The hardness of Incoloy 825 tubes typically measures around 90 HRB on the Rockwell B scale and can reach up to 331 HBW on the Brinell scale, depending on processing. Cold-drawn tubes exhibit higher hardness than annealed ones, and variations may occur based on the product form and manufacturing conditions.