Seamless Nickel 201 Tube
Nickel 201 seamless tubes are widely used in chemical processing equipment, electronics components, marine engineering systems, food processing machinery, and alkali handling applications where material purity, structural integrity, and corrosion resistance are critical.
GZH, a professional Nickel 201 seamless tube manufacturer based in Wenzhou, China, specializes in the precision production of pure nickel alloy tubes using advanced hot extrusion and cold drawing processes. Our Nickel 201 seamless tubing is manufactured in compliance with international standards such as ASTM B161, ASTM B163, ASME SB161, and ASME SB163, ensuring consistent chemical composition, dimensional accuracy, and reliable mechanical performance.
Available in a wide range of outer diameters, wall thicknesses, and custom cut-to-length specifications, our Nickel 201 seamless tubes are suitable for both high-temperature service and corrosive process environments. Each tube undergoes strict quality control procedures, including hydrostatic testing, eddy current testing, ultrasonic inspection, and PMI (Positive Material Identification), to guarantee full traceability and global compliance.
With strong manufacturing capability, competitive pricing, fast delivery, and customized solutions, GZH has established itself as a trusted global supplier of high-purity Nickel 201 seamless tubes for demanding industrial applications.
Seamless Nickel 201 Tube: Properties, Specifications, and Industrial Applications
A Nickel 201 Seamless Tube is a high-purity nickel alloy tube manufactured 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 manufacturing.
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 manufactured 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.
Product Specifications and Data
To provide a comprehensive overview of this high-performance material, here are the detailed technical specifications and performance data for Nickel 201.
Table 1: Chemical Composition of Nickel 201
The composition of Nickel 201 is carefully controlled to achieve its superior properties.
| Grade | Ni | Cu | Fe | Mn | C | Si | S |
| UNS N02200 | ≥99.00 | ≤0.25 | ≤0.40 | ≤0.35 | ≤0.015 | ≤0.35 | ≤0.01 |
| UNS N02201 | ≥99.00 | ≤0.25 | ≤0.40 | ≤0.35 | ≤0.02 | ≤0.35 | ≤0.01 |
Table 2: Typical Mechanical Properties of Nickel 201
Nickel 201 is specifically designed to maintain its strength and shape in various operating environments.
| Tensile Strength | Yield Strength | Elongation | Hardness |
| ≥ 380 MPa | ≥ 100 MPa | ≥ 40% | ≤ 110 HBW |
Table 3: Typical Physical Properties of Nickel 201
These physical properties highlight the material's ability to perform reliably under a wide range of conditions.
| 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 | ±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 | ±0.25 | |||||
| 76 | ±0.38 | 50.8≤D | +4.8/0 | |||
| 114 | ±0.51 | S(ave): ±12.5% | S(Min):+28%/0 | |||
| 152 | ±0.64 | |||||
| 168 | ±0.79 | |||||
| 219 | +1.57/-0.79 | S(ave): +15%/-12.5% | S(Min):+30%/0 | |||
| 356 | +3.18/-0.79 | |||||
| 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 | +0.8/-0.8 | 50.8≤D | +4.8/0 | |||
| 102 | +1.6/-0.8 | |||||
| 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 | ±0.79 | |||||
| 114 | ±1.2 | 50.8≤D | +4.8/0 | |||
| 165 | ±1.6 |
Applications of Seamless Nickel 201 Tubes
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
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
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.
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.