CuSn10, Pre-Alloyed
Pre-alloyed CuSn10 with certified dimensional change per lot. Precision bushings, porous filters, marine PM. Lead-free compliant, custom cuts.
QUICK ANSWER
Pre-alloyed 90/10 bronze powder (Cu-10Sn) is water atomized bronze where every particle carries the complete alloy — no tin diffusion needed during sintering. It presses and sinters into structural bronze parts, filters, and bearings with uniform properties and tight dimensional control, complementing the Cu+Sn premix route (which grows during sintering) where precision matters.
Pre-alloying trades the premix route's sintering growth (useful for bearing porosity) for dimensional predictability: pre-alloyed bronze shrinks slightly and uniformly, so finished part dimensions track die dimensions closely — essential for structural parts with tolerances. The uniform alloy also gives consistent corrosion resistance and mechanical properties that premix parts (with their diffusion gradients) cannot match. Filter producers value the clean, uniform pore structures; structural PM producers value the repeatability.
MATERIAL DATA
Lot-level controls focus on the chemistry, particle characteristics, and process values that influence manufacturing consistency and finished-part performance.
| Element | Content | Performance Role |
|---|---|---|
| Copper (Cu) | 89-91 wt% | Bronze matrix — corrosion resistant and formable |
| Tin (Sn) | 9-11 wt% | Pre-alloyed in every particle — uniform strengthening |
| Phosphorus (P) | 0-0.3 wt% (grade) | Optional sintering aid for bond development |
| Oxygen (O) | < 0.2 wt% | Anneal-reduced for clean sintering |
| Lead (Pb) | < 0.1 wt% | Low-lead compliant composition |
Final limits can be aligned with the agreed purchase specification.
APPLICATIONS
Porous bronze filter production is a core application: pre-alloyed CuSn10 in controlled cuts sinters into filter elements and silencers with rated porosity (see also our spherical bronze filter grade in Category 12 for the premium route). The pre-alloyed chemistry gives pore structures and corrosion performance uniform through the element — important for fuel, hydraulic, and pneumatic filtration in aggressive service. Filter makers buy size cuts on certified distribution.
Structural bronze PM is the second market: precision bushings, thrust washers, worm wheels, and corrosion-resistant hardware pressed to tight tolerances where the premix route's growth scatter is unacceptable. Marine and food-adjacent applications value the uniform lead-free composition; the grade also serves diamond tool bonds, friction materials, and decorative sintered bronze. Across these uses, buyers specify dimensional change per lot — the pre-alloyed route's signature advantage.
PRESS & SINTER (PM) POWDERS
CUSTOM SUPPLY
We supply pre-alloyed CuSn10 in structural (45-150 µm) and filter cuts with certified chemistry, dimensional change data, and size distribution per lot. CuSn8 and phosphorus-bearing variants, low-lead and lead-free certified compositions, and custom cuts for specific porosity targets are available. Not export-controlled.
We supply pre-alloyed CuSn10 in structural (45-150 µm) and filter cuts with certified chemistry, dimensional change data, and size distribution per lot.
CuSn8 and phosphorus-bearing variants, low-lead and lead-free certified compositions, and custom cuts for specific porosity targets are available.
MATERIAL COMPARISON
| Comparison Point | This Product | Copper-Tin Premix |
|---|---|---|
| Alloy uniformity | Complete in every particle | Diffusion-formed during sintering |
| Dimensional change | Slight uniform shrinkage | Growth — harder to control |
| Tolerance capability | Tight | Moderate |
| Bearing porosity control | Good | Excellent — growth creates pores |
| Corrosion uniformity | Uniform through part | Gradient possible at core |
| Best use | Precision structural, filters | Self-lubricating bearings |
TECHNICAL FAQ
Need a different chemistry, particle range, or processing route? Our material team can review the requirement and supply window.
Whenever tolerances and property uniformity matter more than maximum porosity: precision structural parts, rated filters, corrosion-critical parts. For oil-impregnated bearings where pore volume is the product, the premix route (with our electrolytic copper + tin) remains standard.
Typically 0.5-1.5 percent shrinkage depending on density and sintering — we certify the value per lot at reference conditions so your die compensation stays valid across shipments.
Yes — our standard CuSn10 contains no intentional lead and complies with RoHS and drinking-water-relevant requirements, certified per lot.
Yes — narrow cuts matched to filtration ratings, with distribution certification. For the highest-performance rated filters, see our spherical bronze grade in Category 12.
No. Bronze PM powders ship without restrictions.
RELATED PRODUCTS
Compare neighboring grades from the same material family, then review the complete category for additional chemistry and particle options.
Water atomized 316L PM grade, 6.6-7.2 g/cm³ sintered, certified corrosion performance. Pump, lock, marine and filter parts. 304L/410L alternatives.
Cu, CuSn, CuZn friction powders with certified sintering behavior. Motorcycle, racing, wind and industrial brakes. Pre-blended matrices, IATF documentation.
Distaloy-type diffusion alloyed powder, 800-1200 MPa heat-treated, Jominy certified per lot. Transmission gears, synchronizer parts, EV drivetrain PM.
REQUEST THIS GRADE
Share your target chemistry, particle size, process, annual volume, and destination. Our powder specialists will confirm the closest production grade and documentation package.
