ASTM B725 Nickel Alloy 200 (UNS N02200) Welded Pipe
ASTM B725 Nickel Alloy 200 (UNS N02200) welded pipe is produced from commercially pure nickel, offering outstanding resistance to caustic alkalies, neutral salts, and many reducing chemicals. With its excellent mechanical properties, high thermal and electrical conductivity, and exceptional purity, Nickel 200 is widely used in chemical processing, marine environments, and electrical applications where contamination control and superior corrosion resistance are essential. Manufactured under ASTM B725, these welded pipes are available in multiple surface conditions, wall thicknesses, and diameters for versatile industrial use.
Key Features
- Made from commercially pure nickel with high ductility and toughness
- Excellent resistance to caustic alkalis and neutral or reducing solutions
- High thermal and electrical conductivity
- Exceptional corrosion resistance in marine and chemical environments
- Suitable for ultra-high purity applications
- Excellent fabricability, weldability, and formability
- Stable performance across a wide temperature range
Equivalent Grades
| Standard | Grade |
|---|---|
| UNS | N02200 |
| WNR | 2.4060 |
| BS | NA11 |
| ISO | Ni 99.2 |
| Trade Name | Nickel 200 |
Available Sizes
Outer Diameter (OD)
- From 6 mm (1/4″ NB) up to 914.4 mm (30″ NPS)
Wall Thickness (WT)
- Available in 5S, 10S, 40S, 80S, 160, XXS and other schedules
- Thickness range from 0.3 mm to 50 mm or more, depending on OD and schedule
Length Options
- Supplied in Single Random (SRL), Double Random (DRL)
- Custom lengths up to 13,500 mm (approx. 44 feet) available on request
ASTM B725 Alloy 200 (UNS N02200) Chemical Composition
| Element | Percentage (%) |
|---|---|
| Nickel (Ni) | ≥ 99.0 |
| Iron (Fe) | ≤ 0.40 |
| Manganese (Mn) | ≤ 0.35 |
| Carbon (C) | ≤ 0.15 |
| Silicon (Si) | ≤ 0.35 |
| Copper (Cu) | ≤ 0.25 |
| Sulfur (S) | ≤ 0.01 |
ASTM B725 Alloy 200 Mechanical Properties
| Property | Value |
|---|---|
| Tensile Strength | ≥ 380 MPa |
| Yield Strength (0.2% Offset) | ≥ 100 MPa |
| Elongation | ≥ 40% |
| Hardness | ≤ 70 HRB |
UNS N02200 Physical Properties
| Property | Value |
|---|---|
| Density | 8.89 g/cm³ |
| Melting Point | 1435 – 1446°C |
| Electrical Resistivity | 0.099 μΩ·m |
| Thermal Conductivity | 90 W/m·K |
| Modulus of Elasticity | 205 GPa |
Type of ASTM B725 Alloy 200 (UNS N02200) Pipes
- ASTM B725 Nickel 200 Welded Pipes
- Welded & Annealed Pipes
- Large Diameter Welded Pipes
- Custom Fabricated Nickel Alloy 200 Welded Pipes
Applications
- Caustic alkali production units
- Chemical and petrochemical processing equipment
- Marine and seawater handling systems
- Food processing and high-purity systems
- Electrical and thermal equipment
- Heat exchangers, condensers, evaporators
- Aerospace and defense components
- Gas processing and environmental systems
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