What is H68 brass?
Brass is a specific term that refers to a wide range of copper-zinc alloys having, good electrical and thermal conductivity, strength, hardness, wear- resistance, ductility, and corrosion-resistance.
Brasses are available in a wide range of colors such as yellow, red, silver and gold etc. These colored brasses are used by designers and architects to improve the inside and outside appearances of buildings.
UNS C26000 cartridge brass alloys in the yellow brass series have the highest ductility. These alloys are mostly cold formed and they can also be easily machined.
Chemical Composition
The chemical composition of UNS C26000 cartridge brass alloys is outlined in the following table.
| Element | Content (%) |
|---|---|
| Cu | 68.5-71.5 |
| Fe | 0.050 |
| Pb | 0.070 |
| Other | 0.15 |
| Zn | 28.5 |
Physical Properties
The following table shows the physical properties of UNS C26000 cartridge brass alloys.
| Properties | Metric | Imperial |
|---|---|---|
| Melting point-liquidus | 954°C | 1750°F |
| Melting point-solidus | 916°C | 1680°F |
| Density (@20°C/68°F) | 8.53 gm/cm3 | 0.308 lb/in3 |
Mechanical Properties
The mechanical properties of UNS C26000 cartridge brass alloys are displayed in the following table.
| Properties | Metric | Imperial |
|---|---|---|
| Tensile strength (depending on temper) | 303-896 MPa | 44-130 ksi |
| Yield strength (depending on temper) | 76-448 MPa | 11-65 ksi |
| Elongation (75mm/3in) | 66% | 66% |
| Poisson's ratio | 0.34 | 0.34 |
| Elastic modulus | 117 GP | 16969 ksi |
Thermal Properties
The thermal properties of UNS C26000 cartridge brass alloys are given in the following table.
| Properties | Metric | Imperial |
|---|---|---|
| Thermal expansion co-efficient (@temperature 20-300°C/68-572°F) | 19.9 μm/m°C | 11.1 μin/in°F |
| Thermal conductivity (@temperature 20°C/68°F) | 120 W/mK | 833 BTU in/hr.ft².°F |
Other Designations
Equivalent materials to UNS C26000 cartridge brass alloys are given in the table below.
| ASTM B129 | ASTM B134 | ASTM B135 | ASTM B19 |
| ASTM B36 | ASTM B569 | ASTM B587 | MIL C-10375 |
| MIL S-22499 | MIL T-20219 | SAE J461 | SAE J463 |
Fabrication and Heat Treatment
Annealing
UNS C26000 cartridge brass alloys are annealed between 427 and 760°C (800 and 1400°F).
Cold Working
UNS C26000 brass alloys have good cold working properties.
Welding
The welding processes recommended for UNS C26000 brass alloys include oxyacetylene welding, soldering, gas shielded arc welding, brazing, butt welding and spot welding. Seam welding and coated metal arc welding are not recommended for these alloys.
Forging
UNS C26000 brass alloys are forged between 732 and 843°C (1350 and 1550°F).
Hot Working
UNS C26000 brass alloys have fair hot forming capacity.
Our factory
Our factory specializes in the production and manufacturing of high-quality copper products. We operate a comprehensive, end-to-end production line equipped with advanced continuous casting and rolling mills, precision drawing machines, high-speed rolling mills, and automated heat treatment systems. We professionally produce a wide range of copper tubes, plates, bars, wires, and foils. A strict quality inspection system is implemented throughout the entire process, from raw material intake to finished product delivery. Supported by precision instruments such as spectrometers, metallographic microscopes, tensile testing machines, eddy current flaw detectors, and laser dimension gauges, we ensure that our products fully comply with international and domestic standards-including ASTM, EN, JIS, and GB-in terms of chemical composition, mechanical properties, dimensional accuracy, and surface quality. We are committed to providing global customers with stable, reliable, and fully-specified copper material solutions.
copper product packaging
Our products are packaged using professional, customized industrial packaging solutions to ensure they remain intact during long-distance transportation and multiple handlings. For long products such as copper tubes and bars, we use sturdy waterproof wooden crates or metal-frame boxes for secure fixing and protection. Copper plates and foils are individually wrapped with anti-rust paper, then packed into steel-edged boxes or on pallets with reinforced hard corners. Copper wires are wound with moisture-proof film and neatly coiled onto custom-designed reels or placed in wooden cases. All packaging is clearly marked according to customer requirements with shipping marks, specifications, batch numbers, and handling symbols. Desiccants can also be placed inside the packages when needed, providing complete protection against rust, moisture, and impact throughout the entire journey from production to the destination port.
