Other materials
3D Printing、MIM、HIP、Brazing、Spraying、Porous material、PM
CuZn copper-zinc alloy powder · Brass powder · CuZn20
Uniform composition · Excellent electrical and thermal conductivity · Specifically for powder metallurgy/brazing -300 mesh, main recommendation
Process Advantages
Precise formulation · Low impurities
Zinc content is precisely controlled, and key impurities are rigorously managed, ensuring consistent and stable material performance.
Excellent electrical and thermal conductivity
It exhibits excellent electrical and thermal conductivity, making it suitable for applications that demand both thermal and electrical conduction, such as thermal management and soldering fillers.
Highly corrosion-resistant
The copper–zinc alloy forms a dense oxide film, offering resistance to atmospheric, freshwater, and weak acid corrosion, thereby extending the service life of components.
Particle size is flexibly adjustable.
Standard—300 mesh; customizable to any particle size within the 15–150 μm range with a narrow particle-size distribution, suitable for PM, MIM, and brazing processes.
Product Real-World Photos & Microscopic Morphology
-300 mesh powder SEM
Irregular/spherical particles with a narrow particle size distribution and excellent flowability.
Real-life photos of the powder
Yellow powder, packaged in vacuum‑sealed aluminum foil bags or iron drums, with batch traceability.
Powder Metallurgy/Brazed Components
Typical applications include oil-impregnated bearings, gears, and brazed joints.
CuZn copper-zinc alloy powder: high-performance brass powder
Copper–zinc alloy (brass) exhibits excellent mechanical properties, corrosion resistance, and electrical and thermal conductivity, making it a key material in powder metallurgy and brazing applications. Using a combination of non‑vacuum atomization and precision sieving, we produce a range of Cu–Zn alloy powders, with CuZn20 (copper ≥ 80%, zinc ≈ 20%) as the flagship grade. We also offer CuZn30, CuZn40, and powders compliant with the brazing standard BCu54Zn (copper 53–55%, zinc remainder). These powders feature high purity and superior flowability, finding widespread use in powder‑metallurgy components such as oil‑impregnated bearings, gears, and locks; friction materials like brake pads and clutch discs; as well as copper‑based brazing fillers, chemical catalysts, and gold‑simulating coatings.
Chemical Composition (wt%, multiple grades)
| Grade | Cu | Zn | Fe ≤ | Pb ≤ | Total other impurities ≤ |
|---|---|---|---|---|---|
| CuZn20 | Bal. | 19.5-20.5 | 0.1 | 0.03 | 0.2 |
| CuZn30 | Bal. | 29.5-30.5 | 0.1 | 0.03 | 0.2 |
| CuZn40 | Bal. | 39.5-42.5 | 0.1 | 0.03 | 0.2 |
| BCu54Zn | 53.0-55.0 | Bal. | 0.1 | 0.03 | 0.2 |
* Oxygen content is well controlled and can be further reduced upon customer request. Custom copper–zinc ratios are also available.
Key Particle Size Specifications & Physical Properties
| Particle size specification | Corresponding mesh count | D50 range (μm) | Loose packing density (g/cm³) | Tap density (g/cm³) | Flowability (s/50g) | Appearance | Typical Applications |
|---|---|---|---|---|---|---|---|
| -300 mesh | ≤48μm | 25-40 | 3.0-3.8 | 4.0-4.8 | ≤30 | Irregular/spheroidal | Powder metallurgy pressing, oil-impregnated bearings, brazing filler metals |
| -200 mesh | ≤75μm | 45-65 | 3.2-4.0 | 4.2-5.0 | ≤28 | Irregular/spheroidal | Powder metallurgy, friction materials, thermal spraying |
| 15–53 μm | -270+500 mesh | 25-38 | 3.0-3.8 | 4.0-4.8 | ≤30 | Spheroidal | MIM, SLM, Precision Brazing |
| 53-150 μm | -100+270 mesh | 70-110 | 3.5-4.2 | 4.5-5.2 | ≤26 | Irregular | Thermal spraying, coarse powder for powder metallurgy |
* -300 mesh is the standard stock particle size; other particle sizes are available upon request. Particle morphology can be tailored to meet process requirements.
| Parameter item | Typical value of CuZn20 | Note |
|---|---|---|
| Density (theoretical) | 8.5–8.7 g/cm³ | Decreases with increasing zinc content. |
| Melting point range | 900-940℃ | Suitable for copper-based brazing and powder metallurgy sintering. |
| Electrical conductivity | Excellent | In the annealed state, it decreases slightly with increasing zinc content. |
| Thermal conductivity (20°C) | Excellent | Good thermal conductivity |
Typical application areas
Powder metallurgy
Oil-impregnated bearings, gears, locks, precision structural components, and powder metallurgy copper-based parts
Friction material
Brake pads, clutch facings, wear-resistant linings, copper-based friction materials
Welding filler metal
Copper–zinc brazing alloy (BCu54Zn), alloy filler powder, flame brazing
Chemical catalysis
Corrosion-resistant catalyst support, methanol synthesis catalyst, desulfurizing agent
Surface decoration
Imitation gold coating, metal crafts, decorative coatings
3D printing
Metal powder bed fusion, laser cladding, conductive structural components
CuZn20 alloy powder vs. pure copper powder
| Performance Dimension | CuZn20 (brass powder) | Pure copper powder |
|---|---|---|
| Strength/Hardness | ✓ Higher (solid-solution strengthening) | Lower |
| Corrosion resistance | ✓ Superior to pure copper | General |
| Electrical conductivity | Good | Excellent |
| Cost | Lower (zinc partially replaces copper) | Relatively high |
| Sintering shrinkage rate | Smaller, with high dimensional accuracy. | Relatively large contraction |
While maintaining excellent electrical conductivity, CuZn alloys significantly enhance strength, hardness, and corrosion resistance, all at a lower cost, making them an economical choice for powder metallurgy components and brazing fillers.
Process Recommendations and Parameters
| Craftsmanship | Recommended particle size | Key parameters | Product Performance |
|---|---|---|---|
| Powder metallurgy pressing + sintering | -300 mesh | Pressing at 400–600 MPa, sintering at 850–920°C, in a reducing atmosphere. | Density ≥ 8.2 g/cm³, hardness ≥ 60 HRB |
| Copper-based brazing alloy (BCu54Zn) | -300 mesh | Brazing temperature: 900–950°C, used with FB102 flux. | Excellent joint strength, dense. |
| Thermal spraying | 53–106 μm | Plasma/Supersonic Spraying | The coating is dense, corrosion-resistant, and wear-resistant. |
End-to-end testing capability
Each batch of CuZn powder is tested for major elements (Cu, Zn), impurities (Fe, Pb, etc.), particle size distribution, oxygen content, tapped and loose bulk densities, and flowability. A Certificate of Analysis (COA) is provided.
Packaging & Delivery
Powder packaging
Vacuum-sealed in a double-layer aluminum foil pouch (to prevent oxidation), with an outer iron or plastic drum.
Specifications: 1 kg, 5 kg, 10 kg, 25 kg, 50 kg per drum
Export packaging
Export orders are packed in wooden crates or palletized and reinforced to protect against moisture and impact.
Compatible with sea freight, air freight, and international express delivery.
Delivery time
Standard particle size in stock; ships within 2–5 days after order confirmation.
Customized particle size or composition: 7–12 days
Batch Traceability
For each batch, a sample is retained, and the COA report is shipped with the goods.
Supports third-party testing (e.g., SGS)
Free sample
Free samples are provided for process validation.
Small-batch samples; bulk supply upon quality confirmation.
Customized Services
Custom particle size, custom copper-to-zinc ratio
Meets special operating conditions and equipment requirements
Shipping documents
COA, MSDS, ingredient list, packing list
Meets export customs clearance requirements and customer in-plant inspection standards.
Technical Support
Providing guidance on powder metallurgy and brazing process parameters.
Assist in resolving issues during use.
Inquire Now for Free Samples
Fill out the form on the right or contact us directly; we will provide product samples, technical data sheets, and price quotes to help you quickly complete your additive manufacturing process validation.
Address: No.39, Liandong Yougu lnd. Park, Bachelor Street,Changsha City,Hunan Province, China.
Recommend products
Maybe you want to know something else.
Contact Us
Address: No.39, Liandong Yougu lnd. Park, Bachelor Street,Changsha City,Hunan Province, China.
