Product Description
Performance of 300 Mesh Brazing Powder (CuP8 Copper Welding Powder
/ Bronze Alloy Powder)
1. General Characteristics
Alloy Type: CuP8 (Phosphor Bronze)
Mesh Size: 300 mesh (fine powder for uniform application)
Composition: ~92% Cu, ~8% P (may include small amounts of Ag or Sn
for enhanced properties)
Brazing Temperature: ~710–800°C (varies based on joint
configuration)
Melting Range: ~710–750°C (eutectic reaction ensures good flow)
2. Key Performance Advantages
✅ Excellent Wettability & Flow – Spreads smoothly on copper and
copper alloys, ensuring strong joints.
✅ Self-Fluxing Property – Phosphorus (P) acts as a deoxidizer,
reducing the need for external flux in many applications.
✅ High Joint Strength – Forms durable, leak-proof joints with good
mechanical properties.
✅ Corrosion Resistance – Suitable for plumbing, refrigeration, and
electrical applications.
✅ Fine Mesh (300) – Ensures precise application, ideal for
automated brazing and delicate work.
3. Typical Applications
HVAC & Refrigeration: Pipe joints, compressor connections.
Electrical Components: Busbars, terminals, circuit breakers.
Plumbing & Automotive: Copper tubing, heat exchangers.
Jewelry & Artwork: Bronze brazing with minimal cleanup.
4. Quality Stability Factors
✔ Consistent Particle Size Distribution – 300 mesh ensures uniform
melting.
✔ Low Oxide Content – Minimizes porosity and weak joints.
✔ Batch-to-Batch Consistency – Reliable for industrial use.
✔ Compliance with Standards: Meets AWS A5.8 (if applicable) and
industry specs.
5. Comparison with Alternatives
| Feature | CuP8 (300 Mesh) | Regular Bronze Paste | Silver-Based Alloys |
|---|
| Cost | Moderate | Low | High |
| Flux Needed | Minimal (self-fluxing) | Yes | Yes |
| Joint Strength | High | Medium | Very High |
| Best For | Copper-to-copper | General repairs | High-stress joints |
Excellent flowability and wettability braze powder joining metal
components
【 Main Application 】
*Welding between metal parts
*Diamond brazing
【 Product advantage 】
*One of the earliest research and production units of brazing alloy
powder in China, with a long history and mature technology,
customers all over the country
*For different applications, different atomization technology is
used to ensure the best utilization value and cost performance of
powder.
*Good sphericity of powder, controllable particle size composition.
*According to different requirements, some powder oxygen content
can be controlled below 200ppm.
【 Featured Products 】
*Nickel base filler metal grades: BNi-2, BNi-7
Introduction: BNi-2 filler metal is the most widely used nickel
base high temperature filler metal. braze
In the process, it has good wettability, and the joint has
excellent oxidation resistance and corrosion resistance
Performance. Suitable for brazing stainless steel, heat-resistant
steel and superalloy working at high temperature
Parts. BNi-7 has the lowest melting temperature among nickel-based
brazing metals, 14% Cr element
At the same time, good heat resistance and corrosion resistance of
the filler metal were ensured. In the brazing process, BNi-7
The filler metal has excellent fluidity and can flow into
close-contact joints.
Copper base filler metal containing titanium grade: BCuSnTi
Introduction: CuSnTi filler metal is mainly used in brazing diamond
tools. Ti is a strong carbide active element and is also high
The strength of the connection element can generate TiC on the
diamond surface as an intermediate layer, improve the diamond
surface wettability, to improve
Combine strength for purpose.
Silver base filler metal grade: BAgCu28
Introduction: BAgCu28 filler metal is a kind of eutectic alloy
filler metal, alloy melting point
780℃, brazing process has good wettability, strong joint filling
ability, and can
Enough to form high strength, high conductivity and corrosion
resistance of brazing joints, widely used in electricity
Device welding, can also be used for brazing low carbon steel,
stainless steel, superalloy, copper and
Copper alloy, Var alloy and refractory alloy, etc.
| Name | Standard Designation | AWS Designation | Typical Component | Particle Size | Melting Temp. |
| Nickel based brazing powder | BNi73CrFeSiB (C) | BNi-1 | Cr14B3.1Si4.5Fe4.5C:0.7Ni bal. | -200
-300 | 980-1060 |
| BNi82CrSiBFe | BNi-2 | Cr7B3Si4.5Fe3Ni bal. | -200
-300 | 970-1000 |
| BNi92SiB | BNi-3 | B3Si4.5Ni bal. | -200
-300 | 980-1040 |
| BNi95SiB | BNi-4 | B1.8Si3.5Ni bal. | -200
-300 | 980-1070 |
| BNi71CrSi | BNi-5 | Crl9Sil0Ni bal. | -200
-300 | 1080-1135 |
| BNi76CrP | BNi-7 | Crl4P10Ni bal. | -200
-300 | 890 |
| BNi81CrB | BNi-9 | Crl5B3.5Ni bal. | -200
-300 | 1055 |
Copper base
braze
powder | BCu100 | BCu-1 | Cuz99.90 | -200
-300 | 1085 |
| BCu92P |
| P8Cu bal. | -200
-300 | 710-770 |
| BCu60Zn |
| Zn40Cu bal. | -200
-300 | 875-895 |
| BCuSn |
| Sn20Cu bal. | -200
-300 | 800-930 |
| BCu86SnP |
| Sn7P6.8Cu bal. | -200
-300 | 650-700 |
| BCuM nP |
| Mn30P1Cu bal. | -200
-300 | 800-850 |
| BCu84MnNi |
| Mn12Ni4Cu bal. | -200
-300 | 965-1000 |
| BCu85PSnNi |
| Sn7P6.5Ni1.2Cu bal. | -200 | 612-682 |
| BCuSnTi |
| Sn19Ti10Cu bal. | -250 | 900-960 |
Aluminium base
Brazing metal | BAI88Si |
| Sil2Al bal. | -200 | 575-585 |
| BAI9OSi |
| Si10Al bal. | -200 | 575-590 |
| BAI89SiMg |
| Si10Mgl.5A1l bal. | -200 | 555-590 |
Silver base
Brazing metal | BAg72Cu |
| Cu28Ag bal. | -300 | 779 |
Factory equipment
Exhibition & Partner
Case
Ship to Germany
Ship to Australia
