ASTM B622 UNS N06200 Pipe (Hastelloy C-2000 / Alloy C-2000)
ASTM B622 UNS N06200 specifies seamless pipes and tubes manufactured from a nickel-chromium-molybdenum-copper alloy known as Hastelloy C-2000 or Alloy C-2000. This alloy is uniquely designed to provide exceptional resistance to a wide range of corrosive media, particularly sulfuric acid, while maintaining excellent resistance to pitting, crevice corrosion, and stress corrosion cracking.
UNS N06200 pipes combine the best features of nickel-chromium-molybdenum alloys with added copper for enhanced resistance to reducing acids, making them ideal for highly aggressive chemical processing environments.
Key Features
- Exceptional resistance to sulfuric acid over a wide concentration range
- Excellent resistance to pitting and crevice corrosion
- Superior protection against stress corrosion cracking
- Performs well in both oxidizing and reducing environments
- Good weldability and fabrication characteristics
- Long service life in severe chemical process conditions
Equivalent Grades
| Standard | Grade |
|---|---|
| UNS | N06200 |
| W.Nr | 2.4675 |
| DIN | NiCr23Mo16Cu |
| Trade Names | Hastelloy C-2000, Alloy C-2000 |
ASTM B622 UNS N06200 Chemical Composition
| Element | Content (%) |
|---|---|
| Nickel (Ni) | Balance |
| Chromium (Cr) | 22.0 – 24.0 |
| Molybdenum (Mo) | 15.0 – 17.0 |
| Copper (Cu) | 1.3 – 1.9 |
| Iron (Fe) | ≤ 3.0 |
| Cobalt (Co) | ≤ 2.5 |
| Carbon (C) | ≤ 0.01 |
| Manganese (Mn) | ≤ 0.50 |
| Silicon (Si) | ≤ 0.08 |
| Phosphorus (P) | ≤ 0.02 |
| Sulfur (S) | ≤ 0.01 |
Hastelloy C-2000 Mechanical Properties
| Property | Value |
|---|---|
| Tensile Strength | 690 MPa (min) |
| Yield Strength (0.2% Proof) | 310 MPa (min) |
| Elongation | 40% (min) |
| Hardness | ≤ 95 HRB |
Alloy C-2000 Physical Properties
| Property | Value |
|---|---|
| Density | 8.50 g/cm³ |
| Melting Range | 1350 – 1400°C |
| Thermal Conductivity | 9.5 W/m·K |
| Electrical Resistivity | 1.24 µΩ·m |
| Modulus of Elasticity | 205 GPa |
Type of ASTM B622 UNS N06200 Pipe
- UNS N06200 Seamless Pipe
- UNS N06200 Seamless Tube
- Hot Finished Pipes
- Cold Drawn Pipes
- Bright Annealed Tubes
- Chemical Process Pipes
- Heat Exchanger Tubes
Applications
- Sulfuric acid production and handling
- Chemical processing equipment
- Heat exchangers and condensers
- Pickling lines and acid recovery units
- Petrochemical and refinery plants
- Pollution control and waste treatment systems
- Pulp and paper industry
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