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7075 Ultra-Hard Alloy Aluminum Strip | 0.1–5.0mm | Aerospace-Grade Zn-Mg-Cu Composition

Publish Time: 2026-03-14 14:14:45

7075 aluminum alloy owes its exceptional performance to the precise ratio of three key elements: zinc, magnesium, and copper. Zinc is the core for boosting strength; magnesium forms strengthening phases with zinc to double the material’s strength after heat treatment; copper further optimizes hardness and corrosion resistance.

This composition enables it to reach a maximum tensile strength of 620MPa — far harder than ordinary aluminum alloys — while retaining aluminum’s lightweight advantage with a density of only about 2.8g/cm³, 35% lighter than steel. Whether for high-pressure molds or weight-reduced aerospace components, it resists deformation under heavy loads.

7075 Ultra-Hard Alloy Aluminum Strip | 0.1–5.0mm | Aerospace-Grade Zn-Mg-Cu Composition(图1)

Core Composition & Specifications

Item	Detailed Description
Product Name	7075 Alloy Aluminum Strip/Sheet
Thickness Range	0.1mm–5.0mm
Core Composition	Aluminum-based; Zn: 5.1%–6.1%, Mg: 2.1%–2.9%, Cu: 1.2%–2.0%; with trace amounts of Si, Fe, etc.
Main Tempers	T6 (High strength, tensile strength 570–620MPa); T73 (High corrosion resistance, tensile strength 510–560MPa); T651 (Low stress, dimensional stability)
Core Advantages	2.5x stronger than ordinary mild steel; 1/3 the density of steel; excellent machinability; fatigue life over 10 years

Application Scenarios by Thickness

0.1–1.0mm Thin Strip

Ideal for electronic devices and precision parts, such as mobile phone middle frames, laptop casings, and small medical device components. Thin yet tough, it is shatter-resistant and lightweight.

1.0–3.0mm Medium-Thick Sheet/Strip

The top choice for sports equipment, like high-end trekking poles and bicycle frames. This thickness ensures strength while being 15%–20% lighter than ordinary aluminum materials.

3.0–5.0mm Thick Sheet

A staple for mold manufacturing and mechanical parts, such as small injection molds, stamping die plates, and automotive suspension components. It features high hardness (HBW≥160) and minimal deformation during processing.

Universal Scenario

Aerospace auxiliary structural parts and drone frames — its high specific strength increases payload capacity and reduces energy consumption.

Common Q&A

Q1: What is the difference between 7075 and ordinary aluminum alloys (e.g., 6061)?

A1: The core lies in strength and composition. 7075 contains zinc, magnesium, and copper, with a tensile strength more than twice that of 6061, making it suitable for high-strength scenarios. 6061 focuses on corrosion resistance and weldability at a lower price point.

Q2: Will 0.1mm ultra-thin 7075 aluminum strip break easily?

A2: Don’t worry! Despite its thinness, as an ultra-hard alloy, it has good toughness after heat treatment. It can withstand normal processing (cutting, stamping) without breaking, making it ideal for precision electronic parts and small springs that require "thin yet strong" performance.

Q3: Should I choose T6 or T73 temper? How to avoid mistakes?

A3: Choose based on the application environment!

T6 temper: For dry environments and static load-bearing parts (e.g., molds, mechanical components) — it offers the highest strength.
T73 temper: For humid, corrosive environments (e.g., coastal equipment, outdoor components) — its corrosion resistance is 10x that of T6 for longer service life.

Q4: Can thickness tolerance be guaranteed? Is small-batch purchasing supported?

A4: Thickness tolerance is controlled within ±0.02mm for reliable precision. Small-batch orders are welcome — we can customize cutting for as little as tens of kilograms. Free samples are also available for testing before bulk orders.

Q5: How to identify genuine 7075 and avoid counterfeits?

A5: Two simple steps:

Hardness test: Scratch the surface with a key — genuine 7075 leaves almost no mark, while counterfeits (e.g., 6061 passed off as 7075) show obvious scratches.
Request test reports: Regular manufacturers can provide composition and mechanical property reports — genuine 7075 must meet the standard Zn-Mg-Cu content requirements.

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