Precison Machined Parts | Aluminum 6061-T6 & Aluminum 7075-T6

Machined Aluminum 6061-T6 & 7075-T6 Parts, Aluminum Anodizing Available on Request

If you are selecting aluminum for structural components, CNC machined parts, bicycle frames, or aerospace fittings, you have almost certainly narrowed your choices down to two grades: 6061 and 7075. These are the two most in‑demand alloys in our factory, and they sit at opposite ends of the performance spectrum.

* 7075 is the strength champion — in the T6 temper, it boasts a tensile strength exceeding 570 MPa, making it one of the strongest commercial aluminum alloys on the market. It is the dominant material in aerospace, defense, and high‑performance sporting goods — applications where weight reduction is critical, yet load‑bearing capacity must never be compromised. The trade‑offs? It is difficult to weld, commands a higher price, and offers less corrosion resistance.

* 6061, on the other hand, is the versatile workhorse — offering excellent weldability, good corrosion resistance, respectable strength (310 MPa in T6), and a price tag that is typically 30–40% lower than that of 7075. It is the default go‑to for structural frames, automotive components, marine hardware, and virtually any scenario where fabrication flexibility matters more than ultimate strength.

❶ Side by Side Comparison of Aluminum 6061 & Aluminum 7075 Metals
Metal Code	6061-T6	7075-T6
Metal Series	6xxx (Al-Mg-Si)	7xxx (Al-Zn-Mg-Cu)
Chemical Composition Comparison of 6061 & 7075 Aluminum Alloy (Weight %)

Aluminum (Al)	Remainder	Remainder
Silicon (Si)	0.40 - 0.80%	0.40% max
Iron (Fe)	0.70% max	0.50% max
Copper (Cu)	0.15 - 0.40%	1.20 - 2.00%
Manganese (Mn)	0.15% max	0.30% max
Magnesium (Mg)	0.80 - 1.20%	2.10 - 2.90%
Chromium (Cr)	0.04 - 0.35%	0.18 - 0.28%
Zinc (Zn)	0.25% max	5.10 - 6.10%
Titanium (Ti)	0.15% max	0.20% max
Other (Each)	0.05% max	0.05% max
Other (Total)	0.15% max	0.15% max
Property	6061-T6	7075-T6
Snapshot of 6061 & 7075 Aluminum Alloys in Their Most Common Temper

Ultimate Tensile Strength	310 MPa	572 MPa
Yield Strength	276 MPa	503 MPa
Elongation at Break	12–17%	7–11%
Brinell Hardness	95 HB	150 HB
Density	2.70 g/cm³	2.81 g/cm³
Weldability	Excellent	Very Poor
Corrosion Resistance	Good	Moderate (exfoliation risk)
Machinability	Good	Excellent
Typical Price Premium	Baseline	+30–40% over 6061
Primary Market	General structural	Aerospace / high-performance
Summary of Key Differences	6061 is a magnesium and silicon alloy, resulting in a balanced combination of strength, weldability, and corrosion resistance.	7075 is a zinc-based alloy, heavily alloyed with copper and magnesium to achieve very high strength, characteristic of aerospace-grade materials.

❷ Typical Applications and Selectoins on 6061 & 7075 Aluminum Alloys
Application	Recommended Alloy	Reason
Welded structural frame	6061-T6	Weldability essential
Aerospace wing spar	7075-T6 or T73	Maximum strength-to-weight
CNC-machined bracket	7075-T6	Better machinability + higher strength
Bicycle frame (mid-range)	6061-T6	Weldability + good anodizing
Bicycle frame (premium)	7075-T6	Maximum stiffness-to-weight
Marine deck fitting	6061-T6	Corrosion resistance required
Armor plate	7075-T6	Maximum strength (or 7075-T73 for corrosive)
Pressure vessel (welded)	6061-T6	Must be weldable + post-weld ageable
Hydraulic cylinder rod	6061-T6 hard-anodized	Hard anodize performs better on 6061
Drone frame	7075-T6	High strength, CNC-machined
Architectural window frame	6061-T6	Anodizing quality + formability

► 6061-T6 Typical Applications • Structural frames: Truck beds, scaffolding, platform supports • Automotive: Engine brackets, suspension arms, drive shafts, heat exchangers • Marine hardware: Mast steps, deck fittings, railing (not hull plating) • Welded structures: Pressure vessels, pipe systems, tanks • Architectural: Window frames, door frames, curtain wall mullions • Consumer products: Bicycle frames (mid-range), camera housings, electronics enclosures • General fabrication: Any application requiring welding + moderate strength + good corrosion resistance ► 7075-T6 Typical Applications • Aerospace: Wing spar caps, fuselage frames, landing gear components, seat tracks • Defense: Armor plate inserts, weapon receivers, UAV structures • High-performance sports: Premium bicycle frames, mountain bike chainrings, competition rock-climbing hardware • CNC-machined parts: Precision brackets, aerospace fittings, drone motor mounts, camera gimbal structures • Mold tooling: Low-volume injection mold inserts, die casting tools • High-stress fasteners: Aerospace bolts, pins, shear pins

❸ Different Types of Aluminum Anodizing Available at SinoBronze for Customer Options
Types	Type-1	Type-2	Type-3
Type Name	Chromic Acid Anodizing	Sulfuric Acid Anodizing	Hard Anodize Anodizing
Pictures for reference
Corrosion resistance	Good	Good	Excellent
Wear resistance	Poor	Moderate	Excellent
SB Plating Thickness	0.08-0.25 µm	2.54-25 µm	12.7-80 µm
Function	Decorative	Decorative + Functional	Corrosion Resistance + High Durability
Cost	Low	Moderate	High
Tensile Strength	Low	Moderate	High
Porosity	Low	Moderate to High	High
Appearance	Primary Coat	Clear or Dyed	Hard Clear or Hard Black
Environmental Friendly	No	Yes	Yes
Electrical Insulation	Good	Moderate	Poor
Thermal Resistance	Moderate	Moderate	Good
Anti-UV	Poor	Good	Excellent
Adhesion for Paint	Poor	Excellent	Moderate
Typical Used Colors of Aluminum Anodizing Coatings