Seamless Nickel 201 Pipe
与镍200不同，镍201的低碳含量使其在315°C (600°F)以上的温度下不会因晶间碳而脆化，因此是高温化学加工和合成纤维生产的理想选择。我们的无缝管具有优异的导热性和导电性，以及在低温和高温下均表现出的卓越机械性能。通过先进的冷拔和真空退火工艺，信哲确保每根管材都保持严格的尺寸公差和高完整性的表面光洁度，满足关键工业应用的需求。
Seamless Nickel 201 Pipe – High-Purity Nickel Alloy Solutions for Caustic & High-Temperature Service
What is Seamless Nickel 201 Pipe?
Seamless Nickel 201 Pipe (UNS N02201) is a commercially pure wrought nickel alloy with a minimum of 99.0% Ni, engineered for extreme corrosion resistance, high-temperature stability, and structural integrity. Compared to Nickel 200, Nickel 201 features a lower carbon content (max 0.02%), which prevents graphitization—a type of embrittlement occurring in nickel between 315°C and 650°C (600°F – 1200°F).
Manufactured from a single solid billet without welds, these pipes ensure maximum mechanical strength and leak-free performance, even in aggressive chemical and high-pressure environments.
Key Advantages & Performance Characteristics
Exceptional Caustic Resistance
Nickel 201 is renowned for superior resistance to caustic alkalis, including sodium hydroxide (NaOH) and potassium hydroxide (KOH), even at elevated temperatures and high concentrations.
High-Temperature Stability
Thelow-carbon composition ensures the alloy remains ductile, crack-resistant, and dimensionally stable during prolonged exposure above 315°C (600°F).
Superior Thermal & Electrical Conductivity
Nickel 201 offers excellent heat transferandhigh electrical conductivity, outperforming most stainless steels and nickel-based alloys in heat exchanger and conductive applications.
High Ductility & Fabricability
Despite its strength, Nickel 201 is highly workable, allowing easy bending, flaring, and complex fabrication.
Vacuum & Purity Applications
The alloy’s low vapor pressure and high purity make it ideal for vacuum systems and high-purity chemical processing.
Technical Specifications of Nickel 201 Seamless Pipes
Table 1: Chemical Composition (UNS N02201 vs. N02200)
The composition of Nickel 201 is carefully balanced to achieve its superior corrosion resistance and high-temperature stability.
| 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 high-stress and corrosive 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 (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 |
- Caustic Processing – Evaporators and pipelines handling molten caustic soda and potassium hydroxide
- Petrochemicals – Vinyl chloride monomer (VCM) production and chlorination systems
- Food & Synthetic Fibers – High-temperature food processing and viscous fiber production
- Electronics & Aerospace – Heat exchanger tubes, vacuum components, and battery manufacturing
Quality Compliance & Certified Documentation
AllSeamless Nickel 201 pipes are supplied with 100% traceabilityandcertified testing reports:
- EN 10204 3.1 & 3.2 Material Test Certificates (MTC)
- Positive Material Identification (PMI) – 100% verification of alloy purity
- Mechanical Testing – Tensile, Yield, Elongation, Flattening, Hardness
- Non-Destructive Testing (NDT) – Eddy Current (ET), Ultrasonic (UT), Hydrostatic Pressure Testing
- Surface Analysis – Visual inspection and surface roughness measurement
