GNEE can provide the form
Grade Name
|
Item |
Specification |
|
UNS Number |
C68700 |
|
Chinese Designation |
HAl77-2 (YS/T 649-2018) |
|
European Standard |
CuZn20Al2 (DIN 17660) |
|
Common Name |
Arsenical Aluminum Brass, Naval Aluminum Brass |
|
Primary Standards |
ASTM B111M, YS/T 649-2018, DIN 17672 |
Product Features
Exceptional Corrosion Resistance: Arsenic (As) inhibits dezincification (salt spray >720 hours with coating).
High Strength-Ductility Balance: Annealed tensile strength ≥360 MPa, elongation ≥50%; hardened strength up to 600 MPa.
Optimized Cold Workability: Cold deformation rate ≤80%, suitable for deep drawing/flaring.
Thermal Conductivity: 109 W/(m·K), electrical conductivity 28% IACS, ideal for heat exchange systems.
Environmental Safety: As ≤0.10%, compliant with REACH industrial exemptions for cooling water systems.
Common Product Forms & Dimensions
|
Form |
Thickness/Dia. (mm) |
Width/Length (mm) |
Special Specifications |
|
Tube |
Wall: 0.15–10.0 |
OD: 3.0–260 |
Seamless/Welded condenser tubes (0.5–25m) |
|
Bar |
Φ3–200 |
Cut-to-length: 0.5–6m |
Hex/Square/Forged rounds |
|
Plate |
0.5–80 |
1000–6000 (L) ×500–3000 (W) |
Max. single plate: 5 tons |
|
Strip |
0.08–2.5 |
Coil width: 10–600 |
Slitting tolerance ±0.1mm |
Chemical Composition
|
Element |
Standard Range (wt%) |
Typical (wt%) |
Function |
|
Cu |
76.0–79.0 |
77.5 |
Matrix, ensures conductivity |
|
Al |
1.8–2.5 |
2.2 |
Enhances strength & atmospheric corrosion resistance |
|
As |
0.02–0.10 |
0.06 |
Suppresses dezincification |
|
Zn |
Balance |
20.0 |
Improves fluidity, reduces cost |
|
Fe |
≤0.06 |
0.03 |
Refines grain structure |
|
Pb |
≤0.07 |
0.02 |
Enhances machinability |
|
Total Impurities |
≤0.30 |
0.15 |
Sn≤0.05%, Sb≤0.005% strictly controlled |
Physical Properties
|
Property |
Value |
Test Condition |
|
Density (g/cm³) |
8.40 |
20°C |
|
Melting Point (°C) |
900–930 |
– |
|
Thermal Conductivity (W/(m·K)) |
109 |
20°C |
|
Electrical Conductivity (%IACS) |
28 |
Annealed |
|
Thermal Expansion (×10⁻⁶/K) |
20.2 |
20–300°C |
|
Elastic Modulus (GPa) |
117 |
– |
Mechanical Properties
|
Condition |
Tensile Strength (MPa) |
Yield Strength (MPa) |
Elongation (%) |
Hardness (HRB) |
|
Annealed (O) |
360 [340–380] |
80 [70–90] |
50 [45–55] |
60 [55–65] |
|
¼ Hard (H02) |
450 [430–480] |
250 [230–270] |
25 [20–30] |
100 [90–110] |
|
Hard (H04) |
600 [580–620] |
540 [520–560] |
10 [8–12] |
175 [170–180] |
|
Hot Rolled |
550 [530–570] |
350 [330–370] |
20 [15–25] |
120 [110–130] |
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) |
