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BCu84MnNi copper–manganese–nickel brazing filler metal · High-temperature, high-strength copper-based brazing powder/paste
High-temperature resistance ≥ 300 MPa · Specifically for aerospace and energy equipment -200 mesh · Powder/ointment form
Core Advantages of BCu84MnNi Brazing Alloy
High-temperature oxidation resistance
Brazing temperature: 1000–1050°C; manganese and nickel elements enhance high-temperature performance, delivering excellent long-term stability; suitable for hot-end components.
High-strength connection
Manganese–nickel composite‑reinforced welds exhibit a tensile strength of ≥300 MPa, along with excellent creep resistance and fatigue life, meeting the demands of high‑load operating conditions.
Wide compatibility
Suitable for brazing copper, stainless steel, coated metals, high‑temperature alloys, and dissimilar materials, with a wide process window.
Flexible in form
Powder form is easy to mix; the paste form contains an organic carrier, enabling immediate application and welding, with convenient handling and compatibility across a wide range of process requirements.
Product Real-World Photos & Microscopic Morphology
Powder SEM (-200 mesh)
Irregular/ nearly spherical particles, with uniform particle size and good flowability.
Real-life photo of powdered brazing filler metal
Gray powder, packaged in vacuum-sealed aluminum foil bags or plastic canisters.
Real-life photo of paste-type solder alloy
Syringe/plastic can packaging, ready-to-use, with adjustable viscosity.
BCu84MnNi copper–manganese–nickel high-temperature brazing filler metal
BCu84MnNi is a high‑performance copper‑based brazing alloy. By incorporating manganese (11–14%) and nickel (1.5–5.0%), the copper matrix undergoes solid‑solution strengthening, significantly enhancing the weld’s high‑temperature strength, creep resistance, and fatigue life. Its narrow melting range—solidus at 965°C and liquidus at 1000°C—ensures controllable fluidity during high‑temperature brazing, yielding dense joints free of brittle phases. The material is produced via vacuum atomization, with a standard particle size of –200 mesh (≤75 μm), offering excellent flowability. It can be directly applied as a powder for flame or induction brazing, or blended with organic binders to form a paste suitable for automated dispensing and coating of complex geometries. This alloy is widely used for high‑temperature brazing of copper–copper, copper–steel, copper–stainless steel, stainless steel–stainless steel, and dissimilar metal joints, delivering outstanding performance in demanding applications such as aerospace engine high‑temperature ducts and turbine blades, nuclear power plant heat exchangers, automotive turbochargers, and vacuum switches.
Chemical Composition (wt%, primary and reference grades)
| Grade | Cu | Mn | Ni | Zn | Solidus (°C) | Liquidus temperature (°C) |
|---|---|---|---|---|---|---|
| BCu84MnNi (Main recommendation) |
Bal. | 11-14 | 1.5-5.0 | — | 965 | 1000 |
| Cu53MnNi | Bal. | 37-39 | 8-10 | — | 860 | 1050 |
| Cu55ZnNiMn | 53-57 | 3-5 | 5-7 | Bal. | 910 | 933 |
| BCu48ZnNi | 46-50 | — | 9-11 | Bal. | 890 | 920 |
| BCu54Zn | 52-56 | — | — | Bal. | 885 | 888 |
* We primarily promote BCu84MnNi; other grades are available upon request. Powdered grade—200 mesh—and we can also accommodate custom specifications for finer particle sizes.
Solder Paste Specification (BCu84MnNi)
| Grade | Alloy powder content (wt%) | Binder (wt%) | Solidus (°C) | Liquidus temperature (°C) | Recommended Process |
|---|---|---|---|---|---|
| BCu84MnNi solder paste | 80-90 | Margin | 965 | 1000 | Automatic dispensing, screen printing, manual coating |
* Viscosity can be customized to suit the customer’s dispensing equipment (10,000–500,000 cP), with complete carrier evaporation and minimal residue.
Particle Size Specifications & Physical Properties (Powder Form)
| Particle size specification | Corresponding mesh count | D50 range (μm) | Loose packing density (g/cm³) | Tap density (g/cm³) | Flowability (s/50g) | Recommended Process |
|---|---|---|---|---|---|---|
| ★ -200 mesh | ≤75μm | 40-65 | ≥3.2 | ≥4.2 | ≤26 | Paste-form raw materials, flame/induction brazing powder, automatic powder feeding |
| -300 mesh | ≤48μm | 25-40 | ≥3.4 | ≥4.4 | ≤25 | Fine paste, spray coating, precision brazing |
| -100 mesh | ≤150μm | 80-110 | ≥3.0 | ≥4.0 | ≤28 | Coarse powder sintering and pre‑formed solder‑pad pressing |
* -200 mesh is our standard recommended specification; other particle sizes are available upon request.
BCu84MnNi Brazing Process Reference
| Base material combination | Recommended Brazing Temperature (°C) | Protective atmosphere/brazing flux | Joint strength |
|---|---|---|---|
| Stainless steel - stainless steel | 1020-1070 | Vacuum/Argon + FB104 | ≥300MPa |
| Copper–Stainless Steel | 1000-1050 | Vacuum/Argon + FB102 | ≥280MPa |
| Superalloy–Stainless Steel | 1030-1080 | Vacuum ≤ 5×10⁻³ Pa | ≥320MPa |
| Copper-Copper | 980-1030 | Argon shielding | ≥260MPa |
* Vacuum or inert gas protection yields the best brazed joint quality. For stainless steel, FB104 flux is recommended.
BCu84MnNi vs. conventional copper-based brazing alloys
| Comparison item | BCu84MnNi | BCu54Zn (brass brazing filler metal) | Pure copper (BCu100) |
|---|---|---|---|
| Liquidus temperature (°C) | 1000 | 888 | 1085 |
| Tensile strength (MPa) | ≥300 | 200-250 | 150-200 |
| High-temperature performance | Excellent (Mn/Ni strengthening) | General | Poor (softens at high temperatures) |
| Applicable base material | Copper/Stainless Steel/Superalloy | Copper and copper alloys | Copper and copper alloys |
BCu84MnNi exhibits significantly superior high-temperature strength and compatibility with base materials compared to conventional copper-based brazing alloys, making it the material of choice for brazing in high-end equipment.
Powdered brazing filler metal (-200 mesh)
- The powder can be applied directly, or pre‑formed solder tabs can be pressed on.
- Excellent fluidity, suitable for automated powder feeding and flame/induction brazing.
- It can be blended with other metal powders to formulate special compositions.
- Vacuum-packed for long-term storage without oxidation.
Paste-type brazing filler metal (ready-to-use)
- No on-site mixing of powder and adhesive is required; simply open the container and use.
- Excellent thixotropy, precise dispensing/printing, and no sagging.
- The carrier volatilizes completely, leaving minimal residue (a no‑clean formulation is available).
- Viscosity is adjustable, making it compatible with various dispensing equipment and manual coating applications.
Typical application areas
Aerospace
High-temperature engine ducts, turbine blades, combustion chamber components, heat exchangers
Energy equipment
Nuclear power plant heat exchangers, boiler piping, high-temperature steam pipelines, nuclear components
Automotive industry
Turbocharger, exhaust system, high-strength structural components, EGR cooler
Power Electronics
Vacuum devices, high-voltage switches, conductive connectors, relay assemblies
Chemical equipment
High-temperature and corrosion-resistant piping, reactor internals, and valve sealing surfaces
Semiconductor equipment
Vacuum chamber, heating assembly, and hermetic feedthroughs
End-to-end testing capability
Each batch of BCu84MnNi powder and solder paste is tested for chemical composition (Cu, Mn, Ni), particle size distribution, oxygen content, flowability, and tapped density, with a Certificate of Analysis (COA) provided.
Packaging & Delivery
Welding powder packaging
Double-layer aluminum foil bag packaging + iron drum/plastic drum
Specifications: 1 kg, 5 kg, 10 kg, 20 kg, 50 kg
Solder paste packaging
Syringes (10 cc/30 cc/50 cc) or plastic containers (100 g/500 g/1 kg)
Refrigerate; shelf life: 6 months.
Delivery time
In-stock items will be shipped within 3–7 days after order confirmation.
Customized paste—ships in 5–10 days.
Batch Traceability
Sample retained for each batch; COA report shipped with the goods.
Quality documents are available.
Free sample
Provide samples
For verification of high-temperature brazing processes
Technical Support
Provide brazing recommendations.
Assist customers in resolving brazing issues.
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.
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Address: No.39, Liandong Yougu lnd. Park, Bachelor Street,Changsha City,Hunan Province, China.
