GNEE can provide the form
Core Advantages
1. Marine Corrosion Benchmark: Dezincification rate <0.1 mm/year (ASTM G48 seawater), service life >15 years.
2. Heat Exchange Efficiency: Condenser tube heat transfer coefficient ≥5200 W/m²·K, 30% higher than stainless steel.
3. Forming Adaptability: Cold bending radius ≥2× wall thickness; compatible with Ag/Cu-P brazing.
4. Cost Efficiency: 40% lower cost than titanium/cupronickel alternatives.
Product Applications
Marine Engineering: Ship condenser tubes, desalination pipelines, subsea valves.
Energy & Power: Thermal power plant condensers, nuclear cooling systems, refinery heat exchangers.
HVAC: Central AC evaporator tubes, chlorinated hot water pipes.
Industrial Components: Corrosion-resistant bearing bushings, deep-drawn sealing rings.
Processing Guidelines
|
Process |
Key Parameters |
Risk Control |
|
Hot Working |
750–830°C (finish >550°C) |
Control O₂ at 0.5–1.5% (prevents Zn volatilization) |
|
Welding |
TIG: 80–120A |
Argon purity ≥99.99% + preheat 150°C (prevents As porosity) |
|
Annealing |
Stress relief: 260–270°C×1h |
N₂ atmosphere anti-oxidation |
|
Cold Working |
Deformation ≤80% |
Intermediate annealing at 520–650°C |
|
Surface Treatment |
Pickling (HNO₃-H₂SO₄) + tinning |
Essential for seawater exposure |
Key Application Scenarios
Mega Vessels: 200k DWT ship condenser tube bundles (seamless, wall 1.5mm).
Nuclear Plants: AP1000 coolant pipes (chloride resistance design).
Coastal Power Stations: Seawater cooling valves (forged + Ni-Cr coated).
Premium HVAC: Central AC evaporator tubes (brazing integrity required).
FAQ
Q1: Is it suitable for potable water systems?
A: Restricted! Arsenic leaching risk. Use only in industrial cooling water systems.
Q2: How to resolve welding porosity?
A: Caused by As/Zn volatilization. Use ≥99.99% argon, preheat 150–200°C, post-weld stress relieve at 260°C×1h.
Q3: How to prevent hot cracking?
A: Control slightly oxidizing atmosphere (O₂: 0.5–1.5%), limit heating time ≤2h.
Q4: How to select vs. C44300 tin brass?
A: C68700 offers superior seawater resistance & 15% cost reduction; C44300 is arsenic-free for civilian applications.
Products provided by GNEE
| Product Category | Standard & Material | Available Forms | Thickness / Diameter Range | Width / OD Range | Length / Form | Temper / State | Surface Finish |
|---|---|---|---|---|---|---|---|
| Copper Sheet & Plate | ASTM B152, B187 Pure Copper (C11000) Phosphor Bronze, Brass |
• Coil • Sheet • Plate |
Sheet: 0.3 mm - 10.0 mm Plate: 10.0 mm - 100 mm |
100 mm - 2500 mm | Coil: Custom Sheet/Plate: 1000mm - 6000mm or Custom |
• O (Soft Annealed) • H02 (Half-Hard) • H04 (Hard) • H08 (Full-Hard) |
• Mill (Bare) • Clad • Brushed • Coated |
| Copper Rod & Bar | ASTM B133, B187 Pure Copper, Tellurium Copper Brass, Bronze |
• Round Rod • Square Bar • Hexagonal Bar • Flat Bar |
Rod Dia.: 2.0 mm - 300 mm Flat Bar Thk.: 3 mm - 50 mm |
Flat Bar Width: 10 mm - 400 mm | Straight: 1000mm - 6000mm Coil (for small dia.) |
• Annealed (Soft) • Half-Hard • Hard • As Drawn |
• Drawn (Smooth) • Turned (Peeled) • Ground (Polished) |
| Copper Wire | ASTM B1, B3 Bare Copper, Tinned Copper |
• Bare Wire • Tinned Wire • Stranded Wire • Braided Wire |
Solid Wire: 0.05 mm - 10.0 mm Stranded: Custom (e.g., 7/0.2mm) |
- | Coil, Spool, Reel Weight: Custom (e.g., 5kg, 25kg) |
• Soft (Annealed) • Hard Drawn • Medium-Hard |
• Bright Bare • Electrotinned • Oxidized-Resistant |
| Copper Tube & Pipe | ASTM B75, B88 Seamless, Welded DHP Copper (C12200) |
• Straight Tube • Coiled Tube • Capillary Tube • Square Tube |
OD: 3 mm - 300 mm Wall Thk.: 0.5 mm - 10.0 mm |
- | Straight: 1000mm - 8000mm Coil: Custom Length |
• Annealed (Soft, Bendable) • Hard Drawn (Straight) |
• Bare (Clean) • Polished • Plastic Capped |
| Copper Foil | ASTM B370 Rolled Annealed (RA) Electrodeposited (ED) |
• Roll / Coil • Strip |
Thickness: 0.01 mm - 0.50 mm (10 µm - 500 µm) |
10 mm - 1300 mm | Coil: Custom Length | • As Rolled (Hard) • Annealed (Soft, Ductile) • Laminated |
• Standard (One Side Bright) • Double Side Bright • Treated (for PCB) |
