ASME SB111 C71500 SMLS 70-30 Copper-Nickel Alloy Steel Tube, Seawater Corrosion Resistance
- YUHONG brand goods have been already exported to more than 85 countries With more than 35 years' experience, because of strict quality control policy, excellent sales service, delivery on time. YUHONG won more and more new clients and got more and more repeat orders from old clients, in YUHONG People's mind: Quality is First Important!
ASME SB111 C71500 SMLS 70-30 Copper-Nickel Alloy Steel Tube, Seawater Corrosion Resistance
ASME SB111 C71500 is a seamless 70-30 copper-nickel alloy tube renowned for its superior seawater corrosion resistance. The addition of nickel and iron enables the formation of a dense, stable protective surface film, effectively resisting pitting, impingement attack, and biofouling. Designed for harsh marine environments, it is the ideal choice for heat exchanger tubing in ship condensers, power plant cooling systems, and desalination plants.
1.Chemical & Mechanical Properties
| ASME SB111 C71500 Chemical Composition (%) | |||||
| Cu | Ni | Pb | Fe | Zn | Mn |
| Rem | 29.0%-33.0% | ≤0.05% | 0.4%-1.0% | ≤1.0% | ≤1.0% |
Mechanical Properties
| Code |
Name
|
Tensile Strength
min ksi
|
Yield Strength
min ksi
|
Elongation
in 2 in.,min %
|
|
O61
|
annealed
|
52 | 18 | |
|
HR50 Wall thicknesses up to 0.048 in., incl
|
drawn and stress-relieved
|
72 | 50 | 12 |
|
HR50
Wall thicknesses over 0.048 in.
|
drawn and stress-relieved
|
72 | 50 | 15 |
Physical properties
| Thermal Conductivity | Coefficient of Thermal Expansion | Modulus of Elasticity | Density |
| ~29 W/m·K | 16.2 x 10⁻⁶ /K | ~156 GPa | 8.94 g/cm³ |
2. Key Adventages
- Superior Seawater Corrosion Resistance
Exhibits excellent resistance to corrosion in seawater and brackish water, effectively resisting pitting, crevice corrosion, and stress corrosion cracking.
- Excellent Biofouling Resistance
The alloy surface inhibits the attachment and growth of marine organisms (such as barnacles, algae), reducing maintenance costs and maintaining heat exchange efficiency.
- Good Mechanical and Fabrication Properties
Possesses high strength, good toughness, and ductility, making it easy for fabrication processes such as bending, welding, and forming.
- Long Service Life
Capable of providing decades of reliable, trouble-free service life under correct operating conditions.
3. Key Applications
- Shipbuilding & Marine Engineering: Ship condensers, heat exchangers, seawater cooling pipe systems.
- Power Generation: Main condenser tubes and feedwater heater tubes for coastal and nuclear power plants.
- Desalination Plants: Heat exchanger tubes and process piping in Multi-Stage Flash and Reverse Osmosis systems.
- Offshore Oil & Gas: Subsea pipelines, platform cooling systems, firewater system piping.
Get in Touch
Have questions about our products or want to discuss a custom order? Our team is ready to help you.