Nickel 201 Seamless Tube

UNS N02201 | 2.4061 | ASTM B161

Nickel 201 Seamless Tube (N02201 / 2.4061) is manufactured to ASTM B161 from tube billet, cold-drawn to the required outside diameter and wall thickness. Supplied from our Wenzhou mill with EN 10204 3.1 mill test certificate, PMI and dimensional inspection on request.

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Nickel 201 Product Overview and Advantages

Item	Description
	ANickel 201 Seamless Tube is a high-purity nickel alloy tube produced from a solid billet of commercially pure wrought nickel through extrusion and piercing processes. Unlike welded tubes, Nickel 201 seamless tubing contains no weld seams, providing uniform mechanical properties, higher pressure resistance, and improved corrosion performance.
	Nickel 201 is essentially a low-carbon version of Nickel 200, containing a minimum of 99% nickel with a maximum carbon content of 0.02%. The reduced carbon content helps prevent graphitization at temperatures above 600°F (315°C), ensuring excellent ductility and mechanical stability in high-temperature environments.
	Because of these characteristics, Nickel 201 seamless tubes are widely used in chemical processing, food production equipment, marine engineering, and electronic industries where high corrosion resistance and thermal stability are required.

Key Features of Nickel 201 Seamless Tubing

Outstanding Corrosion Resistance

Nickel 201 seamless tubes exhibit excellent resistance to various corrosive media, including:

Caustic alkalies and concentrated caustic soda
Neutral and alkaline salt solutions
Organic acids and certain inorganic acids
High-temperature corrosive environments

These properties make Nickel 201 tubing particularly suitable for chemical processing plants and caustic handling systems.

Excellent High-Temperature Performance

The low carbon composition of Nickel 201 prevents graphitization and ensures stable mechanical properties at temperatures above 600°F (315°C). As a result, Nickel 201 tubing performs reliably in high-temperature industrial processes.

High Ductility and Formability

Nickel 201 is highly ductile and malleable, which allows it to be:

Easily cold-formed
Machined and fabricated
Produced into customized tube sizes and shapes

This flexibility makes Nickel 201 seamless pipes and tubes ideal for complex industrial equipment production.

Good Electrical and Thermal Conductivity

Nickel 201 provides excellent thermal and electrical conductivity, making it suitable for applications that require efficient heat transfer and electrical performance.

Excellent Weldability

Nickel 201 tubing can be welded using standard industrial welding processes with minimal risk of cracking, enabling easy fabrication in large processing systems.

Nickel 201 Seamless Tube Specifications

Nickel 201 seamless tubing is typically supplied according to international standards such as:

ASTM B161 / ASTM B163 – Nickel seamless pipes and tubes
ASME SB161 / SB163
DIN / EN Nickel alloy standards

Typical supply range includes:

Outer Diameter (OD): 6 mm – 457mm
Wall Thickness: 0.5 mm – 45 mm
Length: Random, fixed, or customized

Nickel 201 tubes are available in annealed, pickled, or polished surface finishes, depending on application requirements.

To provide a comprehensive overview of this high-performance material, here are the detailed technical specifications and performance data for Nickel 201.

The composition of Nickel 201 is carefully controlled to achieve its superior properties.

Chemical Composition of Nickel 201

Grade	Ni	Cu	Fe	Mn	C	Si	S
UNS N02200	≥99.00	≤0.25	≤0.40	≤0.35	≤ 0.15	≤0.35	≤0.01
UNS N02201	≥99.00	≤0.25	≤0.40	≤0.35	≤0.02	≤0.35	≤0.01

Nickel 201 is specifically designed to maintain its strength and shape in various operating environments.

Typical Mechanical Properties of Nickel 201

Tensile Strength	Yield Strength	Elongation	Hardness
≥ 380 MPa	≥ 100 MPa	≥ 40%	≤ 110 HBW

These physical properties highlight the material's ability to perform reliably under a wide range of conditions.

Typical Physical Properties of Nickel 201

Density	Melting Point	Thermal Expansion	Thermal Conductivity	Modulus of Elasticity	Electrical Resistivity
8.89 g/cm³	1435 - 1446 °C	13.3 µm/m·°C	60.7 W/m·K	205 GPa	0.096 x 10⁻⁶ Ω·m

Table 4: The Standard of Seamless Nickel Alloy Tube or Pipe ASTM B829 Size Tolerance Chart (mm):

STANDARD	OD[D]	TOLERANCE	THICKNESS[S]	TOLERANCE	LENGTH	TOLERANCE
ASTM B829 (Seamless Cold-Worked Tube and Pipe)	10＜d＜16	±0.13	S(ave): ±15%	S(Min):+30%/0	D＜50.8	+3.2/0
	16≤D≤38	±0.19	S(ave): ±10%	S(Min):+22%/0
	38＜d≤76	±0.25
	76＜d≤114	±0.38			50.8≤D	+4.8/0
	114＜d≤154	±0.51	S(ave): ±12.5%	S(Min):+28%/0
	152＜d≤168	±0.64
	168＜d≤219	±0.79
	219＜d≤356	+1.57/-0.79	S(ave): +15%/-12.5%	S(Min):+30%/0
	356＜d≤610	+3.18/-0.79	S(ave): +15%/-12.5%	S(Min):+30%/0
ASTM B829 (Hot-Finished Tube)	19≤D≤38	+0.4/-0.8	S(ave): ±12.5%	S(Min):+28.5%/0	D＜50.8	+3.2/0
	38＜d≤102	+0.8/-0.8			50.8≤D	+4.8/0
	102＜d≤235	+1.6/-0.8			50.8≤D	+4.8/0
ASTM B829 (Seamless Hot-Worked Pipe)	25≤D≤48	+0.4/-0.79	S(ave): +16%/-12.5%	S(Min):+28.5%/0	D＜50.8	+3.2/0
	48＜d≤114	±0.79			D＜50.8	+3.2/0
	114＜d≤165	±1.2			50.8≤D	+4.8/0
	165＜d≤235	±1.6			50.8≤D	+4.8/0

Industry	Typical Applications
Chemical Processing Industry	Nickel 201 tubes are widely used for handling high-temperature caustic chemicals, including: Caustic soda production systems Chemical transfer pipelines Heat exchangers and reactors

Industry

Typical Applications

Chemical Processing Industry

Nickel 201 tubes are widely used for handling high-temperature caustic chemicals, including:

Caustic soda production systems
Chemical transfer pipelines
Heat exchangers and reactors

Industry	Typical Applications
Food Processing Equipment	Because of its high purity and corrosion resistance, Nickel 201 tubing is commonly used in: Food processing machinery Storage tanks Hygienic piping systems

Industry

Typical Applications

Food Processing Equipment

Because of its high purity and corrosion resistance, Nickel 201 tubing is commonly used in:

Food processing machinery
Storage tanks
Hygienic piping systems

Industry	Typical Applications
Electronics and Electrical Industry	The alloy’s excellent electrical conductivity makes it suitable for: Electrical connectors Electronic components High-temperature conductive parts

Industry

Typical Applications

Electronics and Electrical Industry

The alloy’s excellent electrical conductivity makes it suitable for:

Electrical connectors
Electronic components
High-temperature conductive parts

Marine Engineering

Nickel 201 seamless tubes are also applied in saltwater and marine environments, where corrosion resistance and thermal stability are essential.

Industry	Typical Applications
Why Choose Nickel 201 Seamless Tubes?	Compared with welded nickel tubes, Nickel 201 seamless tubing offers several advantages: No weld seam, reducing potential failure points Higher pressure and temperature tolerance More uniform microstructure and mechanical properties Better long-term corrosion resistance These benefits make Nickel 201 seamless tubes a reliable choice for critical industrial applications.

Industry

Typical Applications

Why Choose Nickel 201 Seamless Tubes?

Compared with welded nickel tubes, Nickel 201 seamless tubing offers several advantages:

No weld seam, reducing potential failure points
Higher pressure and temperature tolerance
More uniform microstructure and mechanical properties
Better long-term corrosion resistance

These benefits make Nickel 201 seamless tubes a reliable choice for critical industrial applications.

Frequently Asked Questions About Nickel 201 Seamless Tubes

What is Nickel 201 Seamless Tube?

A Nickel 201 Seamless Tube is a high-purity nickel alloy tube produced from a solid billet of commercially pure wrought nickel through extrusion and piercing processes. Unlike welded tubes, Nickel 201 seamless tubing contains no weld seams, providing uniform mechanical properties, higher pressure resistance, and improved corrosion performance.

Which standards does Nickel 201 Seamless Tube comply with?

Nickel 201 Seamless Tube is produced to ASTM B161, ASTM B163, ASME SB161, ASTM B829.

Request a Nickel 201 Tube Quotation

Send us your specification for Seamless Nickel seamless tube — OD, wall thickness, standard and quantity — and our engineering team will reply with a quotation within 24 hours.