What is C26000 metal?
C26000 is a copper-zinc alloy internationally known as "bullet casing brass" or "70/30 brass," with a nominal composition of approximately 70% copper and 30% zinc, and an α-phase single-phase microstructure. This alloy is renowned for its excellent cold-working plasticity, good strength and corrosion resistance, and beautiful golden color. It is a classic engineering material that combines excellent formability, electrical and thermal conductivity, and cost-effectiveness, and is widely used in ammunition casings, electronic connectors, heat sinks, decorative hardware, and musical instrument manufacturing.
Thermal Properties
| Thermal Properties | Original Value | Comments |
|---|---|---|
| CTE, linear | 19.9 µm/m-°C @Temperature 20.0 - 300 °C |
|
| Specific Heat Capacity | 0.375 J/g-°C | |
| Thermal Conductivity | 120 W/m-K @Temperature 20.0 °C |
|
| Melting Point | 915 - 955 °C | |
| Solidus | 915 °C | |
| Liquidus | 955 °C |
Mechanical Properties
| Mechanical Properties | Original Value | Comments |
|---|---|---|
| Hardness, Rockwell B | 70 | |
| Hardness, Rockwell 30T | 65 | |
| Tensile Strength, Ultimate | 425 MPa | |
| Tensile Strength, Yield | 360 MPa | |
| Elongation at Break | 23 % | In 50 mm |
| Modulus of Elasticity | 110 GPa | |
| Poissons Ratio | 0.375 | |
| Fatigue Strength | 125 MPa @# of Cycles 1.00e+8 |
Reverse Bending |
| Machinability | 30 % | UNS C36000 (free-cutting brass) = 100% |
| Shear Modulus | 40.0 GPa | |
| Shear Strength | 275 MPa |
Physical Properties
| Physical Properties | Original Value | Comments |
|---|---|---|
| Density | 8.53 g/cc |
Processing Properties
| Processing Properties | Original Value | Comments |
|---|---|---|
| Annealing Temperature | 425 - 750 °C | |
| Hot-Working Temperature | 725 - 850 °C |
Component Elements Properties
| Component Elements Properties | Original Value | Comments |
|---|---|---|
| Copper, Cu | 68.5 - 71.5 % | |
| Iron, Fe | <= 0.050 % | |
| Lead, Pb | <= 0.070 % | |
| Other, total | <= 0.15 % | |
| Zinc, Zn | 28.5 - 31.5 % |
Applications
radiator cores and tanks, flashlight shells, lamp fixtures, fasteners, locks, hinges, ammunition components, plumbing accessories, pins, rivets.
Test specimen: flat products - 1mm thickness.
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.
