Aluminum Alloy
Longwang offers custom aluminum alloy CNC precision machining services with fast turnaround and competitive pricing. A wide range of aluminum grades and surface treatments is available to meet high-quality requirements, from prototyping to mass production.
Due to its lightweight nature, high strength, and excellent machinability, aluminum has become one of the most widely used materials in CNC machining. It offers natural corrosion resistance, good thermal and electrical conductivity, and full recyclability, combining durability with sustainability. Furthermore, the availability of various aluminum alloy grades—each with distinct mechanical properties—allows it to meet the requirements of applications ranging from general structural components to high-stress aerospace parts.
In terms of machining, aluminum offers significant advantages in efficiency and quality. Its low cutting resistance facilitates high-speed milling, turning, drilling, and tapping operations while minimizing tool wear; this helps shorten lead times and reduce tooling costs in mass production. Additionally, it is highly compatible with a wide range of secondary surface treatments—such as hard anodizing, sandblasting, mechanical brushing, powder coating, and laser marking—thereby perfectly combining structural durability with a premium aesthetic finish.
6061 offers excellent overall machining performance and is the industry-recognized benchmark alloy for aluminum machining; it features moderate cutting forces and yields smooth machined surfaces with minimal burrs. It is suitable for a full range of machining operations—including high-speed milling, turning, drilling, and tapping—and allows for stable control of critical feature tolerances within ±0.01 mm.
While 6063 has lower strength than 6061, it offers superior formability and an excellent anodized finish. It is primarily used for secondary processing of semi-finished profiles—such as milling, drilling, tapping, and trimming—resulting in a high-quality surface finish that makes it ideal for decorative components.
6082 offers excellent overall machining characteristics, with performance closely comparable to that of 6061; both belong to the category of highly machinable aluminum alloys and are suitable for a full range of machining operations, including milling, drilling, tapping, and boring.
7075 is a high-strength, aerospace-grade alloy and one of the strongest aluminum alloys currently available for commercial use. Compared to 6061, it has poorer machinability; its high hardness and significant cutting resistance lead to faster tool wear and higher processing costs.
It offers high strength, good fatigue resistance, and moderate heat resistance, though its inherent corrosion resistance is poor. Its cutting resistance falls between that of 6061 and 7075-T6, and it almost invariably requires a protective finish (such as chromate conversion coating, painting, or hard anodizing) after machining.
5052 alloy offers excellent corrosion resistance, good formability, and moderate strength. It is frequently used in conjunction with sheet metal fabrication processes—primarily involving secondary operations such as drilling, tapping, and edge trimming after cutting—and yields excellent results with anodizing; in its bare state, it is suitable for use in mild outdoor and marine environments.
5083 is a commercial rust-proof aluminum alloy in the 5000 series featuring the highest magnesium content and strength; while its processing characteristics are similar to those of 5052, it offers higher strength and slightly greater cutting resistance.
LW offers aluminum surface treatment services, including anodizing, sandblasting, powder coating, and brushing. These processes not only enhance corrosion and wear resistance and improve aesthetic appeal but also provide customizable options for color and texture.
As Machined
Standard finish, surface roughness of 3.2 μm (126 μin), removes sharp edges and deburs parts cleanly.
Tumbling
Utilizes barrel or vibratory processes with abrasives to smooth and polish the surface of parts.
Heat Treatment
Alters the physical (and sometimes chemical) properties of a material to achieve desired mechanical properties.
Anodizing
Electrochemical process that forms a durable, corrosion-resistant oxide layer on the surface of metals.
Electroplating
Electroplating is an electrochemical process that deposits a protective metal layer onto a conductive surface.
Polishing
Polishing smooths a surface to improve shine, reduce roughness, and enhance appearance.
Powder Coating
Powder coating provides a durable, scratch-resistant finish with excellent corrosion protection and a clean, attractive appearance.
Brushed
Brushed finish creates a refined linear texture with a modern, metallic look.
Alodine
Chemical treatment process providing corrosion protection and surface preparation for paint adhesion.
CNC machining of aluminum offers excellent machinability, a high strength-to-weight ratio, corrosion resistance, and good thermal and electrical conductivity. However, aluminum has lower hardness and strength than steel, poorer heat resistance, and potentially higher costs.
pros
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Aluminum CNC machining is widely used in aerospace, automotive, electronics, medical devices, and consumer goods due to its lightweight, strength, corrosion resistance, and excellent thermal/electrical conductivity. Typical applications include:
Your Comprehensive Metal Manufacturing Solution Provider
We offer both rapid prototyping and large-scale production, utilizing over 700 machines and experienced engineers to deliver high quality CNC parts with minimal compromise on lead time or consistency.
For precision CNC machining, we hold tolerances as tight as ±0.01mm. For sheet metal fabrication, our standard tolerance is ±0.1mm, depending on design complexity.
We process a wide range of metals including Aluminum (6061, 7075), Stainless Steel (304, 316), Titanium, Copper, Brass, and various specialty alloys.
Yes. We offer fast-turnaround prototyping to help you verify designs and functional requirements before scaling to high-volume manufacturing.
Yes, we are IATF 16949 certified for the automotive industry, along with ISO 9001 and ISO 14001 certifications to ensure global quality standards.
Prototypes usually take 3-7 days. Mass production lead times vary from 2-4 weeks depending on the project scale and secondary finishing requirements.
Yes. We have an integrated eco-friendly coating line and offer anodizing, plating, sandblasting, and laser engraving as part of our one-stop service.
Simply upload your CAD drawings (STEP, IGS, or PDF) via our contact form. Our engineers will provide a technical assessment and quote within 24 hours.
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