Seamless Nickel 200 Pipe (UNS N02200)
Our Nickel 200 seamless pipes are renowned for their outstanding thermal and electrical conductivity, as well as their unique magnetostrictive properties. These pipes maintain excellent mechanical properties from cryogenic temperatures up to 315°C (600°F), making them indispensable for chemical processing, synthetic fiber production, and aerospace engineering. Through advanced cold-drawing and vacuum annealing, GZH ensures every pipe offers superior dimensional accuracy and a high-purity surface finish to withstand the most aggressive industrial environments.
Seamless Nickel 200 Pipe (UNS N02200): High-Purity Nickel Pipes for Corrosion-Resistant Applications
Introduction to Nickel 200
Nickel 200 (UNS N02200) is a commercially pure wrought nickel containing 99.0% minimum nickel, known for its excellent resistance to caustic alkalis, corrosion, and oxidation. Due to its outstanding chemical stability and high thermal and electrical conductivity, Nickel 200 is widely used in industries requiring high-purity and corrosion-resistant piping systems.
ASeamless Nickel 200 Pipe is manufactured from a solid billet using hot piercing and cold drawing processes, eliminating welded seams and ensuring superior structural integrity. This seamless construction provides enhanced reliability in high-pressure, high-temperature, and corrosive chemical environments.
Nickel 200 is often compared with Nickel 201 (UNS N02201), a low-carbon version designed for high-temperature applications where prevention of graphitization is critical.
Why Choose Seamless Nickel 200 Pipes
Compared with welded pipes, seamless Nickel 200 pipes offer improved performance in demanding industrial environments.
Key Advantages
1. Excellent Resistance to Caustic Alkalis
Nickel 200 provides outstanding resistance to sodium hydroxide, potassium hydroxide, and other caustic solutions, making it one of the most reliable materials for alkali chemical processing systems.
2. High Thermal and Electrical Conductivity
Pure nickel offers significantly higher conductivity compared to many nickel-based alloys and stainless steels, making it suitable for heat transfer and electronic applications.
3. Superior Mechanical Ductility
Nickel 200 exhibits high ductility and low work-hardening characteristics, allowing easy fabrication through forming, bending, and welding processes.
4. Smooth Seamless Internal Surface
Seamless manufacturing ensures a uniform internal surface, reducing turbulence, improving fluid flow efficiency, and minimizing localized corrosion.
Chemical Composition of Nickel 200 and Nickel 201
Nickel 200 and Nickel 201 are high-purity nickel alloys with very similar compositions. The main difference lies in carbon content, which influences high-temperature performance.
| 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 200
Nickel 200 is specifically designed to maintain its strength and shape in high-stress and corrosive environments.
| Tensile Strength | Yield Strength | Elongation | Hardness |
| ≥ 400 MPa | ≥ 105 MPa | ≥ 40% | ≤ 120 HBW |
Table 3: Typical Physical Properties of Nickel 200
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 (20-100°C) | 60.7 W/m·K (20°C) | 205 GPa | 0.096 x 10⁻⁶ Ω·m (20°C) |
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 |
Seamless Manufacturing Process and Quality Control
The production of Seamless Nickel 200 pipes follows a strict billet-to-pipe manufacturing process to guarantee high quality and dimensional accuracy.
1. Billet Heating and Piercing
High-purity nickel billets are heated and pierced to form a hollow shell.
2. Cold Drawing or Pilger Rolling
Precision cold drawing ensures tight dimensional tolerances and smooth surface finish.
3. Solution Annealing
Heat treatment restores the material’s microstructure and enhances corrosion resistance and ductility.
4. Comprehensive Quality Testing
All pipes undergo rigorous inspection procedures, including:
- PMI Testing (Positive Material Identification) to verify chemical composition
- Non-Destructive Testing (NDT) such as Ultrasonic Testing (UT) and Eddy Current Testing (ET)
- Mechanical Tests including flattening, flaring, and hardness tests according to ASTM standards
These processes ensure zero-defect quality and full compliance with international standards.
Industrial Applications of Seamless Nickel 200 Pipes
Due to its exceptional corrosion resistance and purity, Nickel 200 pipes are widely used across multiple industries.
Chemical Processing Industry
Nickel 200 piping systems are commonly used for:
- Production and storage of caustic soda (sodium hydroxide)
- Handlinghalogen gases such as chlorine and fluorine
- Chemical reactors and process pipelines
Food and Pharmaceutical Industry
The alloy’s purity and corrosion resistance make it suitable for:
- Synthetic fiber production
- Soap and detergent manufacturing
- Food processing systems requiring contamination control
Electronics and Energy Industry
Nickel 200 is used in:
- Fuel cell components
- Cathodes and electronic components
- Magnetostrictive devices
Aerospace and Defense
Its high conductivity and corrosion resistance allow use in:
- Heat exchangers
- High-reliability electronic systems
- Specialized aerospace components
Standards and Certifications
OurSeamless Nickel 200 pipes are manufactured in compliance with major international standards.
Applicable Standards
- ASTM B161 – Seamless Nickel Pipe and Tube
- ASTM B829 – General requirements for nickel alloy tubes
Quality Certifications
- Material Test Certificates (MTC) according to EN 10204 3.1 / 3.2
- Third-party inspections by SGS, BV, Lloyd’s, and ABS
- Laboratory testing for grain size, corrosion resistance, and material integrity
This documentation ensures full material traceability and international compliance for critical industrial applications.
Conclusion
Seamless Nickel 200 pipes provide an ideal solution for industries requiring high purity, excellent corrosion resistance, and superior conductivity. Their seamless structure and high nickel content ensure reliable performance in caustic chemical environments, high-purity processing systems, and advanced industrial applications.
For industries dealing with alkaline chemicals, high-purity production, and corrosive environments, Nickel 200 remains one of the most dependable piping materials available.
