Heat-Resistant Alloy Pipes for Industrial Applications

Kvn Steels has established a strong presence in the industrial sector as a trusted provider of ferrous and non-ferrous metal solutions. We specialize in manufacturing Incoloy 800/800HT/825 Pipes & Tubes tailored to meet the specific requirements of our clients. These advanced alloy products are developed with precision engineering to cater to complex industrial requirements, particularly in environments where high strength, temperature stability, and corrosion resistance are non-negotiable. Offered in seamless, welded, and cold-formed variants, each product is crafted to meet customer-specific standards in terms of dimension, wall thickness, and end configuration, including plain, threaded, and beveled ends.

The composition of these alloys is meticulously balanced with elements such as nickel, chromium, and manganese, enhancing the mechanical integrity and corrosion resistance of the finished product. These pipes and tubes are known for their durability in both oxidizing and reducing environments, making them suitable for harsh operating conditions. Our robust quality assurance processes include detailed inspections such as pitting resistance, hardness testing, flattening, and flaring evaluations to ensure every batch complies with international performance standards.

To support our growing global presence, we actively supply Incoloy 800/800HT/825 Pipes & Tubes across key markets including India, the United Arab Emirates (UAE), the Kingdom of Saudi Arabia (KSA), Kuwait, Qatar, the Sultanate of Oman, Iran, and Iraq. Each shipment is securely packed using wooden pallets, crates, and protective coverings to safeguard against damage during transportation.

Technical Overview

Incoloy 800, 800HT, and 825 alloys belong to a family of high-performance materials renowned for their resistance to thermal degradation and chemical attack. These alloys offer exceptional metallurgical stability, maintaining tensile and creep strength at temperatures exceeding 600°C. The unique composition resists chloride-induced stress corrosion cracking and general oxidation, while also preventing scaling and carburization in elevated temperature operations.

These pipes and tubes are produced under rigorous compliance with international norms, including ASTM B407, B514, ASME SB515, and relevant DIN standards, ensuring uniform quality and dependable performance. Whether in seamless form for high-pressure systems or welded for structural applications, the material's microstructure ensures superior performance in cyclic and continuous high-temperature exposure. Each unit is supplied with traceable documentation, including EN 10204 3.1 certification and optional radiographic or ultrasonic inspection reports as per customer requirements.

This combination of chemical integrity and dimensional precision ensures these alloy products can be seamlessly integrated into critical operations, supporting both operational safety and lifecycle cost-efficiency.

Applications & Industry Use

Due to their unparalleled resistance to oxidation, carburization, and acidic corrosion, Incoloy 800/800HT/825 and Inconel 600/601/625/718 Pipes & Tubes are integral to numerous high-demand industries. They are extensively used in power generation plants, particularly in steam methane reformers, superheaters, reheaters, and boiler components. In nuclear engineering, these pipes serve in pressure boundary systems and heat exchangers due to their high-temperature mechanical strength and corrosion resistance.

The chemical and petrochemical sectors rely on these tubes for handling highly reactive media, while the pulp and paper industry benefits from their endurance in caustic and acidic process environments. Additional use cases include marine applications, gas processing, and oil refining systems—where structural stability under fluctuating temperatures is critical. Their resilience against environmental degradation makes them ideal for long-term deployment in offshore and desert-based operations throughout the Middle East and South Asia.

By delivering reliability in extreme operating environments, these alloy pipes and tubes not only improve efficiency but also significantly reduce the risk of maintenance downtime in mission-critical systems.

800/800HT/825 Incoloy Pipes and Tubes Equivalent Grades

STANDARD	WERKSTOFF NR.	UNS	JIS	BS	GOST	AFNOR	EN	OR
Incoloy 800	1.4876	N08800	NCF 800	NA 15	ЭИ670	Z8NC32-21	X10NiCrAlTi32-20	XH32T
Incoloy 800HT	1.4859 / 1.4876	N08811	NCF 800HT	NA 15(HT)	ЭИ670	-	X8NiCrAlTi32-21	XH32T
Incoloy 825	2.4858	N08825	NCF 825	NA 16	ЭП703	NFE30C20DUM	NiCr21Mo	XH38BT

Incoloy Alloy Seamless Pipes

ASTM B407 Incoloy 800 Seamless Pipes, UNS N08800/ N08811 / N08825 Seamless Pipes, DIN 1.4876 Seamless Pipes, ASME SB407 Incoloy Alloy 825 Seamless Piping

Incoloy Alloy Seamless Tubes

ASME SB407 Incoloy Alloy 800 Seamless Tube, Incoloy 800HT Seamless Tubing, DIN 1.4876 Seamless Tubes, UNS N08811 / N08825 Seamless Tube

Incoloy Alloy Welded Pipes

Incoloy 800 Welded Pipes, UNS N08800/ N08825 Welded Pipe, Incoloy Alloy 800HT Welded Pipes, Incoloy Alloy 825 Welded Pipe Supplier

Incoloy Alloy Welded Tubes

DIN 1.4876 / 2.4858 Welded Tubing, UNS N08800 Welded Tube, B515 Incoloy 800HT Welded Tubes, Incoloy 825 Welded Tubes

Incoloy Alloy ERW Pipes

Incoloy 800 / 800HT ERW Pipes, ASTM B514 Incoloy 825 ERW Pipe, Alloy UNS N08800/ N08811/ N08825 ERW Pipes, DIN 1.4859 / 1.4876 ERW Pipes

Incoloy Alloy ERW Tubes

UNS N08800 / N08811 ERW Tubes, Incoloy 800 / 800HT ERW Tubing, Alloy 825 ERW Tubes, DIN 1.4876 ERW Tube Manufacturer

Incoloy Pipe Specification :

ASME / ASTM SB/B 407 / SB/B 515

Standard :

ASTM, ASME and API

Tube Size :

15"NB – 150"NB

Thickness Range :

6.35 mm OD upto 254 mm OD in 0.6 TO 20 mm thickness.

Type :

Seamless / ERW / Welded / Fabricated Pipes

Thickness Range :

6.35 mm OD upto 254 mm OD in 0.6 TO 20 mm thickness.

Form :

Round, Square, Rectangular, Oval, Hydraulic Etc

Length :

Single Random, Double Random & Required Length

End :

Plain End, Beveled End, Treaded

End Protection :

Plastic Caps

Packing :

Packed in Wooden Boxes, Plastic Bags, Steel Strips Bundled, or as per Customers Requests

Specials :

Sizes and Specifications other than above can be manufactured on request

Chemical Composition of Incoloy Alloy Seamless / Welded Pipes and Tubes

Incoloy	800	800H	825
Ni	30-35	30-35	38.0 – 46.0
Fe	39.5 min	39.5 min	22.0 min
Cr	19-23	19-23	19.5 - 23.5
Cu	0.75 max	0.75 max	1.5 - 3.0
Ti	0.15-0.60	0.15-0.60	0.6 - 1.2
Al	0.15-0.60	0.15-0.60	0.2 max
C	0.1 max	0.05-0.1	0.05 max
Mn	1.5 max	1.5 max	1.0 max
S	0.015 max	0.015 max	0.015 max
Si	1.0 max	1.0 max	0.5 max
Mb	-	-	2.5 - 3.5

Mechanical Properties of Incoloy Alloy 800/800HT/825 Pipes and Tubes

Inconel 800/800HT
Tensile Strength	Psi â€“ 75,000 , MPa â€“ 520
Yield Strength (0.2%Offset)	Psi â€“ 30,000 , MPa â€“205
Elongation	30 %
Inconel 825
Tensile Strength	Psi – 80,000 , MPa – 550
Yield Strength (0.2%Offset)	Psi – 32,000 , MPa –220
Elongation	30 %

Physical Properties of Incoloy 800/800HT Pipes and Tubes

Density lbm/in3	Thermal Conductivity (BTU/h ft. F)	Electrical Resistivity (in x 10-6)	Modulus of Elasticity (psi x 106	Coefficient of Thermal Expansion (in/in)/ F x 10-6	Specific Heat (BTU/lb/ F)	Melting Range (F)
at 68F: 0.285	9.4 at 212F	28.3 at 68F	28	9.4 at 32 – 212F	0.1200 at 68F to 212F	2500 to 2590
	12.4 at 932 F	39.4 at 752F		10.2 at 32 – 1000F
		49.6 at 1652 F		10.4 at 32 – 1500F