Aluminum alloys combine exceptional strength-to-weight ratios with excellent corrosion resistance and thermal conductivity. Through precise alloying with elements like copper, magnesium, silicon, and zinc, manufacturers can tailor aluminum’s properties for applications ranging from aircraft structures to precision machined components.
Understanding Aluminum Alloy Systems
Aluminum alloys are classified by their primary alloying elements, with each series offering distinct characteristics:
- 1xxx Series (99%+ pure aluminum) – Maximum corrosion resistance and formability with lower strength
- 2xxx Series (Copper alloys) – High strength comparable to mild steel, excellent machinability
- 3xxx Series (Manganese alloys) – Moderate strength with excellent formability and corrosion resistance
- 6xxx Series (Magnesium-Silicon alloys) – Good strength, excellent extrudability, and heat treatability
- 7xxx Series (Zinc alloys) – Highest strength aluminum alloys available
- Copper – increases strength and machinability but reduces corrosion resistance
- Magnesium – enhances strength when combined with silicon, excellent for heat treating
- Silicon – improves castability and reduces thermal expansion
- Zinc – provides the highest strength gains, particularly when combined with magnesium
- Manganese – increases strength while maintaining excellent formability
Industries We Serve
- Aerospace & Aviation – Aircraft structural components, wing spars, fuselage frames, and landing gear parts demand the high strength-to-weight ratios of 2024 and 7075 alloys. These materials reduce aircraft weight while maintaining structural integrity under extreme stress and fatigue loading.
- Automotive & Transportation – Drive shafts, suspension components, and structural elements benefit from aluminum’s weight savings that improve fuel efficiency. The 6061 alloy’s combination of strength, weldability, and formability makes it ideal for chassis components and structural applications.
- Medical Devices – Surgical instruments, diagnostic equipment housings, and orthopedic tooling utilize aluminum’s lightweight properties and corrosion resistance. The 6061 alloy offers the strength needed for precision instruments while remaining easy to sterilize and maintain.
- Industrial Machinery – Precision shafts, actuator components, and automation equipment parts require the dimensional stability and machinability of alloys like 2011 and 6061. These materials deliver reliable performance while reducing moving mass in high-speed applications.
- Marine Applications – Boat fittings, deck hardware, and structural components in saltwater environments benefit from the superior corrosion resistance of 6061 and 3003 alloys, particularly when anodized for additional protection.
- Optical & Scientific Instruments – Precision instrument components, telescope mounts, and laboratory equipment utilize aluminum’s stability, low thermal expansion, and excellent machinability for creating accurate, repeatable positioning systems.
Material Selection
Centerless Products processes premium aluminum alloys through our precision grinding, polishing, straightening, cutting, and blanking operations.
Aluminum Alloys
| GRADE | SPECIFICATIONS |
|---|---|
| 2011-T3 CF | UNS A92011, ASTM B211, AMS 4118, AMS QQ-A-225/3 |
| 2017-T4 | UNS A92017, ASTM B211, AMS QQ-A-225/5 |
| 2024-T351 CF | UNS A92024, ASTM B211, AMS 4120, AMS QQ-A-225/6 |
| 2024-T4 CF | UNS A92024, ASTM B211, AMS 4120, AMS QQ-A-225/6 |
| 2024-T851 CF | UNS A92024, ASTM B211, AMS 4339, AMS QQ-A-225/6 |
| 2024-T3511 EXT | UNS A92024, ASTM B221, AMS 4165, AMS QQ-A-200/3 |
| 3003-H14 SMLS TUBE | UNS A93003, ASTM B210, AMS 4067 |
| 6061-T6 CF | UNS A96061, ASTM B211, AMS 4117, AMS QQ-A-225/8 |
| 6061-T651 CF | UNS A96061, ASTM B211, AMS 4117, AMS QQ-A-225/8 |
| 6061-T6511 EXT | UNS A96061, ASTM B221, AMS 4173, AMS QQ-A-200/8 |
| 6063-T5 EXT | UNS A96063, ASTM B221, ASTM B241, AMS 4156, AMS-QQ-A200/9 |
| 6063-T6 SMLS TUBE | UNS A96063, ASTM B210 |
| 7075-T6 CF | UNS A97075, ASTM B211, AMS 4122, AMS QQ-A-225/9 |
| 7075-T651 CF | UNS A97075, ASTM B211, AMS 4123, AMS QQ-A-225/9 |
| 7075-T73 CF | UNS A97075, ASTM B211, AMS 4122, AMS 4124, AMS QQ-A-225/9 |
| 7075-T7351 CF | UNS A97075, ASTM B211, AMS 4124, AMS QQ-A-225/9 |
| 7075-T6511 EXT | UNS A97075, ASTM B221, AMS 4169, AMS QQ-A-200/11 |
| 7075-T73511 EXT | UNS A97075, ASTM B221, AMS 4167, AMS 4617, AMS QQ-A-200/11 |
Heat Treatment and Temper Designations
Aluminum alloys achieve their properties through various temper conditions:
- O (Annealed) – Softest condition, maximum formability
- T3XX – Solution heat treated, cold worked, naturally aged
- T4 – Solution heat treated and naturally aged
- T5 – Artificially aged only (from elevated temperature shaping)
- T6XX – Solution heat treated and artificially aged (peak strength)
- T73 – Solution heat treated and overaged (improved stress-corrosion resistance)
- T8XX – Solution heat treated, cold worked, and artificially aged (combines strength of cold work with precipitation hardening)
Your Partner for Critical Applications – Precision Grinding with Consistent Results
Our centerless grinding capabilities accommodate aluminum’s unique characteristics. We control material temperatures to prevent thermal distortion, maintain sharp grinding wheels to minimize work hardening, and achieve surface finishes suitable for anodizing and other surface treatments.
We control diameter to ±0.00004″ (2µm), maintain excellent roundness and straightness, and achieve surface finishes from general machining quality to mirror-like finishes for optical applications.
Whether you’re producing aerospace components requiring 7075’s strength, free-machining parts from 2011, or corrosion-resistant marine hardware from 6061, Centerless Products delivers the dimensional accuracy and surface quality your applications demand. Contact us today to discuss your needs.