Other materials
3D Printing、MIM、HIP、Brazing、Spraying、Porous material、PM
Copper-tin alloy powder · Bronze powder · CuSn
Atomized Cu–Sn alloy · Uniform composition · Adjustable hardness and tin content CuSn10 ~ CuSn40 · -200 mesh / -300 mesh
Process Advantages
Solid-solution strengthening · Adjustable properties
Tin atoms are solid-solubilized in the copper lattice; as the tin content increases, the alloy’s strength, hardness, and wear resistance improve markedly, while its ductility remains tunable, making it well suited to a variety of operating conditions.
Excellent friction reduction · Corrosion resistance
The addition of tin significantly reduces the coefficient of friction and enhances corrosion resistance in humid, mildly acidic, and marine environments, making it suitable for long‑term operating components.
Strong process adaptability
Irregular, near-spherical morphology; bulk density and flowability have been optimized to simultaneously meet the dual requirements of green‑compact strength and powder‑feeding system stability.
Precise and controllable particle size
Standard grades—200 mesh and 300 mesh—are available, with custom grading options to suit a range of applications, compatible with advanced processes such as PM, SLM, and laser cladding.
Product Real-World Photos & Microscopic Morphology
SEM of CuSn20 powder
Near-spherical particles with a uniform particle size distribution and excellent flowability.
Real-life photos of the powder
Rose-red to light copper-colored powder, packaged in vacuum-aluminum foil bags or iron drums.
Bearings/Diamond Tools
Sliding bearings, gears, and diamond drill bit matrix
Copper-tin alloy powder (bronze powder): atomized pre-alloyed powder
Copper–tin alloys (bronze), benefiting from the solid-solution strengthening effect of tin, significantly enhance hardness, wear resistance, and corrosion resistance while preserving copper’s excellent electrical and thermal conductivity. TIJO employs an atomization process to produce CuSn pre-alloyed powders with uniform composition, low oxygen content, and minimal segregation. By adjusting the tin content, the product can be tailored to transition from high ductility to high hardness and superior wear resistance, fully supporting a wide range of processes, including powder metallurgy compaction and sintering, additive manufacturing, laser cladding, cold spraying, and brazing. The powders exhibit near-spherical or irregular morphologies, with optimized tapped density and flowability to meet the dual requirements of green‑part strength during pressing and stable powder delivery in feed systems. Standard particle sizes include 200 mesh and 300 mesh, with custom grades available to meet customer specifications. These powders are extensively used in sliding bearings, gears, electrical contacts, diamond‑tool substrates, and heavy‑duty seals.
Chemical Composition (wt%, multiple grades)
| Grade | Cu | Sn | Fe ≤ | Pb ≤ | Other impurities ≤ |
|---|---|---|---|---|---|
| CuSn10 | Bal. | 9.5-10.5 | 0.10 | 0.05 | 0.15 |
| CuSn15 | Bal. | 14.5-15.5 | 0.10 | 0.05 | 0.15 |
| CuSn20 | Bal. | 19.5-20.5 | 0.10 | 0.05 | 0.15 |
| CuSn33 | Bal. | 32.5-33.5 | 0.10 | 0.05 | 0.15 |
| CuSn40 | Bal. | 39.0-41.0 | 0.10 | 0.05 | 0.15 |
* Bal. indicates the allowance. Impurity limits comply with the requirements for bronze materials specified in GB/T 5231 and ASTM B505. Oxygen content is well controlled.
Grade Selection · Tin Content and Typical Applications
| Grade | Sn content (%) | Recommended Sintering Temperature (°C) | Typical application scenarios |
|---|---|---|---|
| CuSn10 | 9.5-10.5 | 820-870 | Light-load sliding bearings, oil-impregnated bearings, carbon brushes, connectors, and decorative structural components |
| CuSn15 | 14.5-15.5 | 800-850 | Medium-load gears, bushings, pump and valve components, lock hardware accessories, wear-resistant transition coatings |
| CuSn20 | 19.5-20.5 | 780-830 | Heavy-duty bearings, hydraulic sealing rings, stamping die inserts, laser cladding reinforcement layers |
| CuSn33 | 32.5-33.5 | 750-800 | Diamond grinding wheels / bonding phase for tire‑grinding bodies, geological drill bits, and high‑hardness sleeves |
| CuSn40 | 39.0-41.0 | 720-780 | High-hardness drill bit matrix, cutting tools, and special brazing alloys with low melting point and high fluidity. |
* Selection guidelines: For light loads at high speeds, choose CuSn10; for medium loads at low speeds, choose CuSn15; for heavy loads at low speeds, choose CuSn20 or higher. For diamond tools, CuSn33 is recommended as the preferred option.
Particle Size Specifications & Physical Properties (Typical Measured Values)
| Grade | Particle size specification | Loose packing density (g/cm³) | Tap density (g/cm³) | Flowability (s/50g) | D10(μm) | D50(μm) | D90(μm) |
|---|---|---|---|---|---|---|---|
| CuSn10 | -100 mesh | 2.75 | — | 36.0 | 29.75 | 82.53 | 152.1 |
| CuSn10 | -150 mesh | 3.66 | 4.72 | 22.5 | 14.04 | 37.43 | 79.84 |
| CuSn15 | -200 mesh | 3.56 | 4.63 | — | 12.21 | 36.55 | 73.58 |
| CuSn20 | -300 mesh | 3.44 | 4.67 | — | 9.63 | 24.56 | 49.05 |
* The above data represent typical values for different batches; please refer to the test report for specific details. -200 mesh and -300 mesh are our standard specifications, and custom sizes are available upon request.
Process Recommendations and Particle Size Selection
| Craftsmanship | Recommended particle size | Recommended grade | Key parameters |
|---|---|---|---|
| Powder Metallurgy (PM): Pressing + Sintering | -200 mesh / -300 mesh | CuSn10/CuSn15/CuSn20 | Pressing at 400–700 MPa, sintering at 780–870°C, in a reducing atmosphere. |
| SLM 3D printing | 15–53 μm | CuSn10 | Laser power: 150–350 W; layer thickness: 30–50 μm. |
| Laser cladding | 53-150 μm | CuSn20/CuSn33 | Power: 1.5–3 kW; powder feed rate: 15–30 g/min |
| Diamond tool matrix | -300 mesh | CuSn33 | Hot-press sintering at 750–800°C under a pressure of 20–40 MPa. |
* Specific process parameters must be optimized based on the equipment and workpiece; TIJO provides technical support.
CuSn Alloy vs. Pure Copper Powder
| Performance Dimension | CuSn bronze alloy | Pure copper powder |
|---|---|---|
| Hardness (as-sintered) | It increases significantly with increasing Sn content. | Lower |
| Abrasion resistance | ✓ Significant improvement | General |
| Friction-reducing property | ✓ Excellent | General |
| Corrosion resistance | ✓ Better | General |
| Electrical conductivity | Decreases with increasing Sn content. | Excellent |
CuSn bronze alloys, while sacrificing some electrical conductivity, offer excellent wear resistance, friction reduction, and corrosion resistance, making them ideal materials for bearings and wear‑resistant components.
📝 Quick Selection Mnemonic
Typical application areas
Sliding bearing
Oil‑impregnated bearings, heavy‑duty bearing shells, thrust bearings, gear pump bushings
Diamond tools
Diamond grinding wheels/buffing wheels, geological drill bit matrix bodies, wire saw beads
Additive manufacturing
SLM 3D-printed heat-dissipating structural components and complex, freeform copper alloy parts
Automotive industry
Synchronizer ring, sleeve, piston ring, exhaust system seals
Electronics and Electrical Engineering
Electrical contacts, connectors, relay terminals, conductive elastic elements
Powder metallurgy
Gears, valve seats, lock hardware components, textile machinery parts, sealing rings
End-to-end testing capability
Each batch of Cu–Sn alloy powder is analyzed for major elements (Cu, Sn), impurities (Fe, Pb, etc.), particle size distribution, oxygen content, tapped and loose bulk densities, and flowability. COA reports and MSDS are 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: 5 kg/bag, 25 kg/drum, or customized per customer requirements.
Export packaging
Export orders are packed in wooden crates or pallets and reinforced to protect against moisture and impact.
Compatible with sea freight, air freight, and international express delivery.
Delivery time
Standard particle sizes are in stock; shipment will be arranged within 2–5 days after order confirmation.
Customized particle size or composition: 5–15 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 and custom tin content 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
Provide guidance on PM, SLM, and cladding process parameters.
Assist in resolving issues encountered 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.
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Address: No.39, Liandong Yougu lnd. Park, Bachelor Street,Changsha City,Hunan Province, China.
