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Aluminum 7075-T6
7075-T6 is a zinc-alloyed aluminum and one of the strongest common aluminum alloys, with typical tensile strength of 83 ksi (572 MPa) and yield of 73 ksi (503 MPa). It machines very well and is the default for highly stressed aerospace, defense and sporting goods parts. It is not fusion weldable and has lower corrosion resistance than 6061, so plan on anodize.
- UNS
- A97075
- EN 573-3
- EN AW-7075 (AlZn5.5MgCu)
- AMS
- AMS 4045 (sheet and plate, T6/T651)
- ISO 209
- AlZn5.5MgCu
How does it compare?
Typical room-temperature values for 7075-T6, against all 48 materials in the library.
- Tensile strength
- 572 MPa80th pct
- Yield strength
- 503 MPa85th pct
- Density
- 2.81 g/cm³53th pct
- Max service temp
- 120 °C41th pct
- Elongation
- 11 %19th pct
- Relative cost
- $$$$$
Bars are relative to the strongest, densest or hottest material in the SSG library. Percentile vs all 48 materials.
- Density
- 2.81 g/cm³ · 0.1015 lb/in³
- Tensile strength
- 572 MPa · 83.0 ksi
- Yield strength
- 503 MPa · 73.0 ksi
- Elongation
- 11%
- Elastic modulus
- 71.7 GPa · 10.4 Msi
- Hardness
- 150 HB
- Max service temperature
- 120 °C · 248 °F
- Melting point
- 477 °C · 891 °F
- Thermal conductivity
- 130 W/m·K
- Machinability
- 300% of 1212 steel
When should you use 7075-T6?
Strengths
- Tensile strength of 83 ksi (572 MPa), above cold-drawn 1018 steel (64 ksi, 440 MPa) at about one-third the weight
- Machines with short chips and a fine finish
- High fatigue strength for an aluminum alloy
- Stocked in bar and plate, including T651 stress-relieved plate
Watch for
- Not fusion weldable; TIG and MIG welds hot-crack
- Susceptible to stress corrosion cracking in T6; specify T73 or T7351 for SCC-critical parts
- Lower general corrosion resistance than 6061; anodize or chem film for outdoor use
- Poor formability and roughly twice the cost of 6061
Typical parts
- Aircraft fittings and brackets
- Bicycle cranks and climbing hardware
- Robot and drone structural parts
- Aluminum mold plates for low-volume injection molds
- High-load fixture components
- Firearm receivers and optics mounts
How 7075-T6 is made into parts
Cost, finishes and design rules for each process in this material.
What does a part in 7075-T6 cost?
A representative part, cnc machining. Raw material at about $13.00/kg is one line of it; process time and tooling usually matter more.
Plate · CNC machining
Order total $2,284
- Tooling
- None
- no hard tooling
- Piece price
- $35.00
- before setup + tooling
- Lead time
- 5–10 days
- to first production
Size
Drag a row to adjust · click to type
Length120120 mm
Width80.080.0 mm
Thickness6.006.00 mm
Quantity
Price per part falls as volume rises
Exact quantity5050 pcs
Material
Design checks pass
Open in builderBudgetary estimate for a representative part. Firm quotes come from principals after drawing review.
Compared head to head
7075-T6 questions
Is 7075 aluminum weldable?
Not by conventional fusion welding. TIG and MIG welds hot-crack and lose most of the T6 strength. Friction stir welding works. For most parts, design bolted or bonded joints, or choose 6061 if welding is required.
7075-T6 vs 7075-T73?
T6 is peak strength, about 83 ksi (572 MPa) tensile. T73 is overaged to resist stress corrosion cracking and exfoliation, at about 73 ksi (505 MPa). Specify T73 or T7351 for parts under sustained tensile stress in humid or marine service.
Is 7075 stronger than steel?
Stronger than mild steel, not heat-treated alloy steel. 7075-T6 at 83 ksi (572 MPa) exceeds cold-drawn 1018 (64 ksi, 440 MPa) but falls well below quenched and tempered 4140, often 140 ksi (965 MPa) or more. By strength-to-weight it beats both.
Why does anodized 7075 look different from 6061?
Zinc and copper in 7075 give clear anodize a slight yellow or bronze tint, and dyed colors can shift. Black dyes well. For color-matched assemblies, anodize parts of the same alloy together.
Similar materials
Quote it in 7075-T6.
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