Nickel-based
Nickel-based filler material is a brazing filler composed of nickel as the matrix, supplemented with low-melting-point elements (such as boron, silicon, phosphorus, etc.) and strengthening elements (such as chromium, cobalt, molybdenum, tungsten, iron, etc.)
CuZn alloy powder
Features:
1. Precise composition: Cu ≥ 80%, Zn ≈ 20%, with low impurity levels (Fe ≤ 0.1%, Pb ≤ 0.03%). 2. Diverse morphology: Available as irregular‑shaped or near‑spherical powders, with flowability tailored to meet the requirements of various processes. 3. Stable performance: Excellent oxidation resistance and electrical conductivity ≥ 25% IACS (International Annealed Copper Standard). 4. Flexible particle size: Standard particle size ranges from 15 to 150 μm, with customized grading options available.
Application:
Packing:
Aluminum foil bag, iron drum, plastic drum, woven bag, pallet, customized packaging
Date of delivery:
Precision grinding, intelligent manufacturing technology, integrated solutions
3-15 days
key word:
CuZn copper-zinc alloy powder · Brass powder
Uniform composition · Excellent electrical and thermal conductivity · Specifically designed for powder metallurgy and brazing -300 mesh, main recommendation
Core Advantages of CuZn Alloy Powder
Precise formulation · Low impurities
Zinc content deviation ≤ 0.5%; Fe ≤ 0.1%; Pb ≤ 0.03%, ensuring consistent and stable material performance.
Excellent electrical and thermal conductivity
Electrical conductivity ≥ 25% IACS, thermal conductivity approximately 120 W/(m·K), suitable for thermal and electrical conduction as well as welding filler applications.
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 grade—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 vacuum atomization combined with precision sieving, we produce a range of Cu–Zn alloy powders, with CuZn20 (copper ≥ 80%, zinc 19.5–20.5%) as the mainstream grade. We also offer CuZn30, CuZn40, and powders compliant with the brazing standard BCu54Zn (copper 53–55%, zinc balance). The powders feature high purity, with impurities limited to Fe ≤ 0.1% and Pb ≤ 0.03%, and exhibit superior flowability (Hall flow rate ≤ 30 s/50 g). They are widely used in powder‑metallurgical oil‑impregnated bearings, gears, locks, and other precision components; in friction materials such as brake pads and clutch discs; as copper‑based brazing filler metals; in chemical catalysts; and for gold‑like 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 ≤ 0.15%; 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 we primarily promote; other particle sizes are available upon request. Morphology can be customized 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 | ≥25% IACS | In the annealed condition, it decreases slightly with increasing zinc content. |
| Thermal conductivity (20°C) | ≈120 W/(m·K) | Excellent 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, desulfurization 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 | ≥25% IACS | ≥58% IACS |
| Cost | Lower (zinc partially replaces copper) | Relatively high |
| Sintering shrinkage rate | Smaller, with high dimensional accuracy. | Relatively large contraction |
While maintaining excellent electrical conductivity, Cu–Zn 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. | Joint strength ≥ 200 MPa, 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 analyzed 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
Double-layer aluminum foil bag, vacuum-sealed + iron drum/plastic container
Specifications: 1 kg, 5 kg, 25 kg, 50 kg
Delivery time
In stock and ready to ship; dispatch within 2–5 days after order confirmation.
Customized products: 7–12 days
Batch Traceability
Sample retained for each batch; COA report shipped with the goods.
Quality documents are available.
Free sample
Samples are provided for verification of powder metallurgy, brazing, and friction materials.
Customized Services
Grain size customization
Technical Support
Provide technical support
Chemical composition（wt%）
Grade | Chemical composition | |
Cu | Zn | |
BCu54Zn | 53.0-55.0 | Bal. |
CuZn20 | Bal. | 19.5-20.5 |
CuZn30 | Bal. | 29.5-30.5 |
CuZn40 | Bal. | 39.5-42.5 |
Physical indicators
[Solid-Liquid Line] 885-888℃
[Brazing Temperature] 910-955℃
[Specification (Item)] -300、
Application areas
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Contact Us
Address: No.39, Liandong Yougu lnd. Park, Bachelor Street,Changsha City,Hunan Province, China.
