ASTM B466 C72200 Copper Nickel Alloy (UNS C72200)
Introduction
ASTM B466 C72200 (UNS C72200) is a copper-nickel alloy with chromium additions, specified under ASTM B466 for seamless copper-nickel pipes and tubes. Often referred to as Cu-Ni-Cr alloy, this grade is designed for applications requiring higher strength, improved resistance to stress corrosion cracking, and enhanced durability compared to conventional copper-nickel alloys. It is widely used in demanding marine and industrial environments.
Key Features
- High mechanical strength compared to standard Cu-Ni alloys
- Excellent resistance to corrosion and stress corrosion cracking
- Improved erosion and wear resistance
- Good thermal stability at elevated temperatures
- Good weldability and fabrication characteristics
- Long service life in aggressive service conditions
Equivalent Grades
| Standard | Grade |
|---|---|
| UNS | C72200 |
| ASTM | B466 C72200 |
| EN | CuNiCrSi |
| DIN | CuNiCr |
Sizes
- Outside Diameter: 6 mm to 273 mm
- Wall Thickness: 1.0 mm to 25 mm
- Length: Random, fixed, or cut-to-size
- Forms Available: Seamless pipes and tubes
ASTM B466 C72200 Chemical Composition
| Element | Percentage (%) |
|---|---|
| Copper (Cu) | Balance |
| Nickel (Ni) | 8.0 – 12.0 |
| Chromium (Cr) | 0.6 – 1.2 |
| Iron (Fe) | ≤ 1.0 |
| Manganese (Mn) | ≤ 1.0 |
| Others | Trace |
C72200 Mechanical Properties
| Property | Typical Value |
|---|---|
| Tensile Strength | 550 – 700 MPa |
| Yield Strength | 400 – 550 MPa |
| Elongation | ≥ 10 % |
| Hardness | ~160 – 220 HB |
UNS C72200 Physical Properties
| Property | Value |
|---|---|
| Density | ~8.9 g/cm³ |
| Melting Range | 1080 – 1120°C |
| Thermal Conductivity | ~45 W/m·K |
| Electrical Conductivity | ~10 % IACS |
Types
- Seamless Copper-Nickel-Chromium Pipes
- Seamless Copper-Nickel-Chromium Tubes
- Condenser Tubes
- Heat Exchanger Tubes
Applications
ASTM B466 C72200 pipes and tubes are used in high-pressure heat exchangers, marine systems, offshore platforms, power plants, and chemical processing equipment. The alloy is particularly suitable for applications requiring high strength, excellent corrosion resistance, and long-term reliability under severe operating conditions.
Reviews
There are no reviews yet.