Suitable for manufacturing wear-resistant parts, heavy-duty sliding parts, shaft sleeves, worm gears, gears, valve fittings, ship parts, and copper alloy functional parts requiring high strength and corrosion resistance.
QAl9-4 Aluminum Bronze is a high-strength copper alloy material with copper as the matrix, aluminum as the main alloying element, and a certain amount of iron. It has high strength, good wear resistance, good corrosion resistance, impact resistance, and fatigue resistance, and is commonly used in shaft sleeves, worm gears, gears, valve parts, pump body accessories, ship parts, wear-resistant sliding parts, and heavy-duty mechanical copper alloy parts. Compared to ordinary Brass, QAl9-4 has better strength, wear resistance, and corrosion resistance; Compared toPure Copperand oxygen-free copper, it has weaker electrical and thermal conductivity, but significantly stronger structural performance.
By focusing on application scenarios, boundaries of advantages, and non-recommended scenarios, it helps sales, customer service, and quoting staff quickly determine whether the material meets current part requirements.
High strength, good wear resistance, good corrosion resistance, good impact resistance, good fatigue resistance, suitable for heavy-duty sliding friction parts, suitable for seawater and humid environments, better corrosion resistance than ordinary Brass, and more suitable for structural and wear-resistant parts than pure copper.
Shaft sleeves, bearing shells, worm gears, gears, sliders, guide bushings, wear-resistant plates, bushings, valve parts, pump body parts, ship parts, propeller parts, marine engineering parts, heavy-duty machinery parts, wear-resistant copper bushings, mechanical connectors, hydraulic equipment parts, mining machinery parts.
High conductivity copper busbars, high thermal conductivity heat dissipation components, low-cost ordinary hardware parts, lightweight structural components, highly elastic snap-on fasteners, food direct contact parts, medical implant parts, ultra-high-precision high-speed transmission parts, strong acid and strong alkali environment parts, decorative parts requiring extremely high color consistency, and electronic components requiring extremely high conductivity.
The following parameters come from product information and material knowledge fields, used for design review, quotation communication, and preliminary judgment before material selection.
| Material positioning | Suitable for manufacturing wear-resistant parts, heavy-duty sliding parts, shaft sleeves, worm gears, gears, valve fittings, ship parts, and copper alloy functional parts requiring high strength and corrosion resistance. |
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| Precision performance | QAl9-4 Aluminum Bronze is suitable for CNC turning, milling, boring, reaming, drilling, tapping, and precision machining, and can be used for machining shaft sleeves, worm gears, bushings, and wear-resistant parts. Actual accuracy is affected by material hardness, tool, clamping method, machining heat, part dimensions, and post-processing. For shaft hole mating surfaces, sliding surfaces, tooth profiles, threads, and sealing surfaces, it is recommended to separately control tolerances, roundness, coaxiality, and surface roughness. |
| Dimensional tolerances | The conventional dimensional tolerances of CNC machining QAl9-4 Aluminum Bronze can be referenced as ± 0.02mm to ±0.10mm, while ordinary structural parts can be evaluated at ±0.10mm-±0.20mm. Bushings, bushings, gears, worm gears, and sliding fitting parts can be further controlled according to specific fitting requirements. This value is a standard reference range and does not guarantee absolute tolerances for all structures. Key mating surfaces should be separately marked with tolerances and roughness requirements. |
| Minimum Wall Thickness | The wall thickness of ordinary CNC machined structures is recommended to be no less than 1.0mm. Since QAl9-4 is commonly used for load-bearing and wear-resistant structures, it is not recommended to design the load-bearing position, sliding fit position, thread position, and press-fit position too thin. Thin-walled shaft sleeves, thin-walled bushings, and large-diameter annular parts should focus on evaluating processing deformation, clamping deformation, and usage strength. |
| Recommended wall thickness | For ordinary structural parts, 1.5mm-3.0mm is recommended; for bushings, bushings, worm gears, gears, wear-resistant blocks, and load-bearing fitting positions, it is recommended to be above 2.0mm; for heavy-duty sliding parts, press-fitted parts, and parts requiring oil groove opening, thickening should be appropriately adjusted according to load, speed, lubrication conditions, and fitting methods. |
| Minimum aperture | CNC machining can achieve smaller hole diameters, but deep and high-precision hole machining requires consideration of tool rigidity, chip evacuation, burrs, and hole wall quality. For general designs, the recommended aperture is no less than 1.0mm. Shaft sleeve holes, positioning holes, oil holes, threaded holes, and lubrication holes should be reasonably designed according to part dimensions, lubrication paths, and post-processing methods. Small oil holes should focus on deburring and cleaning. |
| Assembly clearance | For ordinary metal assemblies, it is recommended to reserve 0.05mm-0.20mm on one side; for sliding fits and shaft sleeve parts, the clearance should be separately designed according to shaft diameter, load, speed, lubrication method, and thermal expansion. Unfinished surfaces are not recommended to be directly used as high-precision sliding mating surfaces. If plating, polishing, or sandblasting is needed later, dimensional allowances should be reserved according to the impact of surface treatment. |
| Detailed performance | QAl9-4 Aluminum Bronze suitable for machining holes, grooves, steps, chamfers, oil grooves, threads, tooth profiles, worm gear tooth surfaces, shaft-hole mating surfaces, and wear-resistant structural details. CNC machining and tooth profile machining detail performance is good, but overly fine sharp corners, thin edges, and fine text may be weakened by material hardness, tool wear, or post-processing. Logos and markings are recommended to be achieved through laser marking, engraving, or etching. |
| Surface effect | QAl9-4 Aluminum Bronze original surface usually appears as golden yellow, yellow-brown, or deep copper-yellow metallic texture, with a more yellowish color thanPure Copperand a slightly heavier texture than ordinary Brass. After turning and milling, a brighter metal surface is obtained; polishing enhances the metallic luster; and sandblasting produces a matte copper alloy finish. Long-term exposure to air, humidity, or seawater environments may cause surface oxidation, darkening, or the formation of protective oxide layers. |
Based on material characteristics and suitable product ranges, customer needs are broken down into easier application directions to determine.
Shaft sleeves, bearing shells, worm gears, gears, sliders, guide bushings, wear-resistant plates, bushings, valve parts, pump body parts, ship parts, propeller parts, marine engineering parts, heavy-duty machinery parts, wear-resistant copper bushings, mechanical connectors, hydraulic equipment parts, mining machinery parts.
Suitable for manufacturing wear-resistant parts, heavy-duty sliding parts, shaft sleeves, worm gears, gears, valve fittings, ship parts, and copper alloy functional parts requiring high strength and corrosion resistance.
The main features of QAl9-4 Aluminum Bronze are that its strength and wear resistance surpass those of ordinary Brass, Pure Copper, and some conventional grades of tin bronze, making it suitable for copper alloy parts that withstand heavy loads, friction, and impact. It has good corrosion resistance in seawater, humid conditions, and partially corrosive environments, making it commonly used in ships, pump valves, and heavy-duty machinery. However, QAl9-4 has higher machining hardness, is more difficult to cut than ordinary Brass, and its material cost is also higher than that of ordinary copper-zinc alloy.
Based on wall thickness, hole position, assembly clearance, dimensional tolerances, and material usage risks, determine in advance whether the part structure is suitable for QAl9-4 Aluminum Bronze.
Post-processing of QAl9-4 Aluminum Bronze affects appearance, dimensions, hole position, assembly clearance, and usage validation results, and should be explained in advance during quotation, DFM review, and sample confirmation stages.
Post-processing should focus on appearance display, dimensional fitting, connection assembly, and testing verification. Parts involving assembly positions need to be reserved in advance for machining, coating, and trial assembly allowances.
For common issues such as threads, snaps, strength, temperature resistance, and weather resistance, identify in advance whether the material needs to be replaced or if another processing method should be used.
When customer demand exceeds QAl9-4 Aluminum Bronze material boundaries, it is necessary to combine strength, temperature resistance, toughness, long-term stability, and mass production goals to promptly recommend alternative materials or processing technologies.
If better machinability and lower cost are required, HPb59-1 lead Brass or H59/H62Brass can be chosen; If higher electrical and thermal conductivity is required, Pure CopperT2, TU2 Oxygen-Free Copper, or chromium-zirconium copper can be chosen; If higher strength and elasticity are required, beryllium copper C17200 can be chosen; If higher corrosion resistance and strength are required,316L Stainless Steel, TC4 Titanium Alloy (Ti-6Al-4V), or nickel-based alloys can be chosen; If ordinary wear-resistant steel parts are needed, 40Cr, 45# steel, or alloy steel can be selected and surface treated.
If customers require copper alloy parts that simultaneously have high strength, wear resistance, impact resistance, and good corrosion resistance, QAl9-4 Aluminum Bronze is a suitable choice. If customers only have ordinary decorative Brass parts or low-cost turned parts, HPb59-1 or H62 are more economical. If customers mainly focus on electrical and thermal conductivity, Pure CopperT2, TU2 Oxygen-Free Copper, or chromium-zirconium copper are more suitable. If customers require long-term severe corrosion or ultra-high load environments, further evaluation should be conducted in conjunction with stainless steel, titanium alloy, or nickel-based alloy.
After uploading 3D/2D drawings and supplementing materials, quantities, tolerances, surface treatments, and delivery requirements, XPartsLab will provide next steps in 3D printing manufacturability, cost, and delivery pathways.
