UNS N06601|2.4851|Inconel 601 Seamless Pipe

Seamless Inconel 601 Pipes (UNS N06601 / W.Nr. 2.4851) are high-performance nickel-chromium alloys engineered with an addition of Aluminum for exceptional resistance to high-temperature oxidation and nitriding. As a premier manufacturer based in Wenzhou, China, XinZhe produces precision seamless tubing that strictly complies with ASTM B167 and ASME SB167 international standards.

Our Inconel 601 seamless pipes are renowned for maintaining high mechanical strength and structural integrity at service temperatures up to 1250°C (2280°F). The alloy’s unique ability to form a tightly adherent oxide scale makes it indispensable for industrial furnace components, chemical processing, and aerospace thermal reactors. Through advanced cold-drawing and rigorous Third-Party Inspection (TPI) approvals, XinZhe ensures every pipe delivers the reliability required for extreme thermal environments. Detailed technical data on chemical composition and mechanical properties are available to support your precision engineering requirements.
"Choosing between Inconel 600 and 601? While both offer corrosion resistance, Inconel 601 is superior for applications requiring maximum oxidation resistance at higher temperatures due to its aluminum content."

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What Is Seamless Inconel 601 Pipe?

Seamless Inconel 601 Pipe (UNS N06601 / W.Nr. 2.4851), also known as Alloy 601 Pipe, is a high-performance nickel-chromium-iron alloy engineered for extreme high-temperature and oxidation environments. Seamless pipes are produced from solid billets through hot extrusion and precision cold drawing, eliminating weld seams and ensuring superior mechanical strength, dimensional uniformity and long-term reliability in high-stress thermal systems.

The defining feature of Inconel 601 is the addition of aluminum combined with high chromium content, which forms a stable and self-healing oxide layer during service. This protective scale provides exceptional resistance to oxidation, carburization and high-temperature corrosion, allowing continuous service at temperatures up to 2200°F (1204°C).

Because of these properties, Inconel 601 seamless pipes are widely used in heat-treating furnaces, petrochemical plants, power generation systems and aerospace equipment.

International Standards and Specifications

Product Type	ASTM Standard	ASME / Other
Seamless Pipe & Tube	ASTM B167	ASME SB167
Condenser & Heat Exchanger Tube	ASTM B163	ASME SB163
European Standard	DIN 17751	ISO 6207

These standards define requirements for chemical composition, mechanical properties, dimensional tolerances, heat treatment conditions, inspection and testing procedures.

Key Performance Advantages of Inconel 601 Seamless Pipes

Exceptional High-Temperature Oxidation Resistance

a stable aluminum oxide layer protects the alloy from scaling and oxidation even during repeated heating and cooling cycles up to 1200°C.

Excellent Carburization Resistance

performs extremely well in carbon-rich furnace atmospheres, ideal for industrial heat-treatment equipment.

Outstanding Metallurgical Stability

maintains excellent ductility and resistance to embrittlement even after long-term exposure to high-temperature combustion gases.

Superior Fabricability

good weldability, excellent cold-forming capability and reliable fabrication performance despite its high-temperature strength.

Product Specifications and Data

Chemical Composition

Grade	Ni	Cr	Fe	Al	Mn	Si	C	Cu	S
N06601	58.00–63.00	21.00–25.00	Balance	1.00–1.70	≤ 1.00	≤ 0.50	≤ 0.10	≤ 1.00	≤ 0.015

Typical Mechanical Properties

Tensile Strength	Yield Strength	Elongation	Hardness
≥ 552 MPa	≥ 207 MPa	≥ 30%	≤ 192 HBW

Typical Physical Properties

Density	Melting Point	Thermal Expansion	Thermal Conductivity	Modulus of Elasticity	Electrical Resistivity
8.1 g/cm³	1395–1425 °C	14.5 µm/m·°C (20-100°C)	11.2 W/m·K (20°C)	203 GPa	1.15 × 10⁻⁶ Ω·m (20°C)

Size Tolerance Chart

Size tolerance of seamless nickel alloy tube per ASTM B163(mm):

Standard / Condition	OD (D), mm	OD Tolerance (mm)	Wall Thickness Tolerance	Length Tolerance
B163 (N02200, N02201, N04400)	12.7 ≤ D	+0.13/−0	ave, ±12.5%; min +25.0%/−0	Cut-to-length: +3.2/−0
	15.9 ≤ D ≤ 38.1	±0.13	ave, ±10.0%; min +20.0%/−0
	38.1 ≤ D ≤ 76.2	±0.25	ave, ±10.0%; min +22.0%/−0
B163 (all other grades)	12.7 ≤ D	±0.13	ave, ±12.5%; min +25.0%/−0	Cut length >9.1 m: +6.4/−0
	15.9 ≤ D ≤ 38.1	±0.19	ave, ±10.0%; min +20.0%/−0
	38.1 ≤ D ≤ 76.2	±0.25	ave, ±10.0%; min +22.0%/−0

Industrial Applications of Seamless Inconel 601 Pipes

Heat Treatment Industry

Radiant tubes
Furnace retorts
Annealing muffles
Flame shields

Chemical and Petrochemical Processing

Catalyst grid supports
Thermal reactors
Heater tubes
High-temperature process piping

Power Generation Systems

Superheater tube supports
Ash handling systems
Grid barriers

Environmental Protection Equipment

Thermal oxidizers
Waste incineration systems
High-temperature gas treatment equipment

Aerospace Engineering

Jet engine igniter terminals
Combustion liner components

Manufacturing Process and Quality Assurance

Cold Drawing and Finishing improve dimensional accuracy, surface finish and mechanical strength; Solution Annealing optimizes the microstructure and enhances corrosion resistance.

Billet Selection

high-purity nickel alloy billets ensure optimal composition and microstructure; Hot Extrusion forms seamless hollow pipes with uniform grain structure.

Non-Destructive Testing

Eddy Current Testing, Ultrasonic Testing, hydrostatic pressure testing plus dimensional and surface inspection.

Quality Certification

EN 10204 3.1 Material Test Certificates with heat number traceability, chemical composition analysis and mechanical test reports.

Frequently Asked Questions About Inconel 601 Pipe

What makes Inconel 601 oxidation resistant?

The addition of about 1.0–1.7% aluminum combined with 21–25% chromium forms a tight, self-healing oxide scale that protects through repeated thermal cycles up to 1200°C.

What standards apply to Inconel 601 seamless pipe?

Seamless pipe and tube to ASTM B167 / ASME SB167; heat-exchanger tube to ASTM B163 / ASME SB163; European standard DIN 17751.

What is the maximum service temperature of Alloy 601?

Continuous service up to about 2200°F (1204°C) in oxidizing environments.

Where is Inconel 601 pipe commonly used?

Radiant tubes, furnace retorts and muffles, catalyst grid supports, thermal oxidizers, superheater tube supports and aerospace combustion components.

Is Inconel 601 easy to fabricate?

Yes. Despite its high-temperature strength, it offers good weldability and excellent cold-forming capability.

Ready to Request a Quotation?

Send your Inconel 601 pipe enquiry with grade, ASTM B167 and edition, OD × wall thickness, length, quantity, end finish, delivery destination and inspection documents — you will get a written quotation stating the specification and edition, delivery condition, documents included and lead time.

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