Aluminum 7005
AA 7005 · UNS A97005 · EN AW-7005, AW 7005
7005 is a medium-strength, copper-free Al-Zn-Mg (7000 series) extrusion alloy, heat-treatable and grain-refined with Zr and Mn, whose heat-affected zone re-ages at room temperature or by artificial aging to recover joint strength.
7005 tempers and conditions
7005 is supplied in 8 conditions, soft to hard.
Compare all 8 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
Annealed | Softest condition, chosen for severe bending/forming or deep drawing before a later solution treatment and age. | 85 | 195 | 20 | 45 HB | 45 % IACS |
As-welded HAZ (naturally re-aged 30 days) | Design condition for welded 7005 structures — HAZ recovers a large part of parent strength by natural aging without post-weld heat treatment. | 205 | 290 | 10 | 78 HB | 42 % IACS |
Solution heat treated and overaged for stress-corrosion resistance | Over-aged variant traded ~10–15 % strength for markedly better stress-corrosion and exfoliation resistance in marine/humid service. | 255 | 310 | 14 | 85 HB | 44 % IACS |
Cooled from hot working and artificially aged | Press-quenched and aged: cheapest route to near-T6 strength in thin-wall 7005 extrusions with less distortion. | 285 | 330 | 12 | 90 HB | 40 % IACS |
Solution heat treated and artificially aged | Standard stocked condition: full precipitation strength for welded frames, structural extrusions and machined brackets. | 295 | 350 | 12 | 94 HB | 40 % IACS |
Solution treated, stress-relieved by stretching, aged | Stretch-relieved extruded profiles for machined parts where residual-stress distortion must be minimized. | 300 | 350 | 11 | 95 HB | 40 % IACS |
T6, stress relieved by stretching, minor straightening | Same as T6510 but with allowance for minor straightening — usual condition for long precision bar and profile stock. | 300 | 350 | 11 | 95 HB | 40 % IACS |
Press quenched, over-aged/stabilized | Proprietary two-step age used on welded bicycle and sports frames — highest 7005 strength with improved SCC stability after welding. | 345 | 393 | 15 | 105 HB | 41 % IACS |
What is 7005?
7005 is a medium-strength, copper-free Al-Zn-Mg (7000 series) extrusion alloy, heat-treatable and grain-refined with Zr and Mn, whose heat-affected zone re-ages at room temperature or by artificial aging to recover joint strength. It is chosen for welded structures that need more strength than 6061 — roughly 40 % higher — at lower cost and better weldability than 7075, and is supplied mainly as extruded tube and profile in T5, T53, T6, T6510/T6511 and T73. Formability and corrosion resistance are only fair. The weld HAZ and the short-transverse direction are sensitive to stress-corrosion cracking, so correct aging (T5/T53/T6) is required and long-term hot service should be avoided. 7005 has a density of 2.78 g/cm³ (0.1 lb/in³), heavier than 74% of aluminum grades. It melts at 607°C (1,125 °F). 7005 has a yield strength of 295 MPa (42.8 ksi) and a tensile strength of 350 MPa (50.8 ksi) — stronger than 75% of aluminum grades. Elongation at break is 12% and the elastic modulus is 72 GPa (10.4 Msi).
What is 7005 used for?
- Bicycle frames and tubing
- Welded truss and space-frame structures
- Snowboard and ski cores
- Truck and trailer structural extrusions
- Sports equipment tubing
- Welded chassis and roll structures
Advantages
- Tough — resists crack growth — 30 MPa·√m (27.3 ksi·√in), better than 76% of aluminum grades
- High strength — 295 MPa (42.8 ksi), better than 75% of aluminum grades
Limitations
- Limited service temperature — 120°C (248 °F), worse than 79% of aluminum grades
7005 properties
Typical room-temperature values; bars are the position among aluminum grades.
Physical3
7005 has a density of 2.78 g/cm³ (0.1 lb/in³), heavier than 74% of aluminum grades. It melts at 607°C (1,125 °F).
Mechanical13
7005 has a yield strength of 295 MPa (42.8 ksi) and a tensile strength of 350 MPa (50.8 ksi) — stronger than 75% of aluminum grades. Elongation at break is 12% and the elastic modulus is 72 GPa (10.4 Msi).
Thermal6
7005 is rated for continuous service to 120°C (248 °F). It conducts heat at 149 W/m·K (86.1 BTU/hr·ft·°F), better than 56% of aluminum grades. Thermal expansion is 23.8 µm/m·K (13.2 µin/in·°F).
Electrical3
7005 conducts electricity at 40 % IACS, better than 72% of aluminum grades.
Chemical & Environmental3
Corrosion resistance is fair (45/100), worse than 62% of aluminum grades.
Sustainability4
Producing a kilogram of 7005 takes about 200 MJ of energy and emits 12.5 kg of CO₂ — less than 60% of aluminum grades. Typical recycled content is 30%.
Manufacturability8
7005's machinability is good (60/100, worse than 51% of aluminum grades); weldability very good (80/100); formability fair (35/100).
Common Calculations5
Values are nominal handbook figures for design screening. Certified mill or lot data ships with every FabDigit order on request.
Strength versus weight in the aluminum family
Yield strength against density for every aluminum grade FabDigit runs. 7005 is highlighted; hover a dot for its name, or open the interactive family chart.
Working with 7005
Is 7005 easy to machine?
Machines well in T5/T6 with sharp polished-flute carbide, high speed and generous coolant; chips are short compared with O temper but material gums if tools dull.
Can 7005 be welded?
Best-weldable 7000 series: GMAW/GTAW with 5356 or 5183 filler, no preheat, HAZ naturally re-ages to ~80 % of parent strength in ~30 days (faster with a 120 °C/24 h post-weld age).
Can 7005 be formed, bent or molded?
Extrudes readily to thin-wall bicycle profiles; cold bending should be done in O or T4-like condition with generous radii, since T6 tube cracks at tight bends.
Manufacturability
The process limits FabDigit applies to 7005. Every 7005 part is priced by an engineer; design inside these and the quote comes back without a redesign loop.
CNC machining
| Machinability | Better60 / 100 |
|---|---|
| ISO material group | N.1 |
| Cutting speed (rough / finish) | 350 / 420 m/min |
| Minimum wall | 0.5 mm |
| Minimum internal radius | 1 mm |
| Drill depth limit | 8× diameter |
| Best surface (machined / polished) | Ra 0.8 / — |
| Hardenable after machining | No |
Sheet metal
| Formability | Better35 / 100 |
|---|---|
| Weldability | Better80 / 100 |
7005 chemical composition (wt %)
Limits by weight percent from the governing specification, written the way the spec states them — a single maximum for impurities, a range for alloying elements, and the base element as balance. Nominal is the typical mid-range value.
| Element | Spec limit (wt %) | Nominal |
|---|---|---|
| Si | ≤ 0.35 | 0.1 |
| Fe | ≤ 0.4 | 0.2 |
| Cukept low for weldability | ≤ 0.1 | 0.03 |
| Mn | 0.2 – 0.7 | 0.4 |
| Mg | 1 – 1.8 | 1.4 |
| Cr | 0.06 – 0.2 | 0.13 |
| Zn | 4 – 5 | 4.5 |
| Ti | 0.01 – 0.06 | 0.03 |
| Zrgrain-structure control | 0.08 – 0.2 | 0.14 |
| Others (each) | ≤ 0.05 | |
| Others (total) | ≤ 0.15 | |
| Al | balance |
What surface finishes work on 7005?
Takes clear and hard sulfuric anodize well and is commonly powder-coated; weld beads anodize a different shade, so painted or shot-peened finishes are preferred on welded frames.
Surface treatments FabDigit runs on aluminum parts — pick them in the quote configurator or call them out on the drawing. Each links to its datasheet in the surface-finish library (thickness, specs, call-out, material verdicts).
Passivation
Conversion Coating
PVD Coating
Equivalent designations
Standards and trade names that resolve to Aluminum 7005 in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
- UNS
- A97005
- Aluminum Association
- AA7005
- EN / DIN / Werkstoff-Nr.
- AW-7005AW 7005AlZn4.5Mg1.5Mn
How much does 7005 cost?
7005 is a standard-cost aluminum ($$), cheaper than about 62% of the materials FabDigit quotes. Part price depends far more on geometry, tolerance and quantity than on the raw stock — upload a CAD file for a live quote.
7005 — frequently asked
What is 7005 used for?
7005 is typically used for bicycle frames and tubing, welded truss and space-frame structures, snowboard and ski cores, truck and trailer structural extrusions, sports equipment tubing and welded chassis and roll structures. In short: weldable mid-strength 7000 series.
What is the yield strength of 7005?
7005 has a typical yield strength of 295 MPa (42.8 ksi) and a tensile strength of 350 MPa (50.8 ksi) — stronger than 75% of aluminum grades. Strength varies by condition: see the 8 listed tempers.
Is 7005 easy to machine?
Reasonably — machinability is rated good (60/100, worse than 51% of aluminum grades). Machines well in T5/T6 with sharp polished-flute carbide, high speed and generous coolant; chips are short compared with O temper but material gums if tools dull.
Can 7005 be welded?
Yes — weldability is rated very good (80/100). Best-weldable 7000 series: GMAW/GTAW with 5356 or 5183 filler, no preheat, HAZ naturally re-ages to ~80 % of parent strength in ~30 days (faster with a 120 °C/24 h post-weld age).
What surface finishes work on 7005?
Takes clear and hard sulfuric anodize well and is commonly powder-coated; weld beads anodize a different shade, so painted or shot-peened finishes are preferred on welded frames.
Can 7005 be formed, bent or molded?
Extrudes readily to thin-wall bicycle profiles; cold bending should be done in O or T4-like condition with generous radii, since T6 tube cracks at tight bends.
What is the maximum service temperature of 7005?
7005 is rated for continuous use to about 120°C (248 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
How much does 7005 cost?
7005 is a standard-cost aluminum ($$), cheaper than about 62% of the materials FabDigit quotes. Part price depends far more on geometry, tolerance and quantity than on the raw stock — upload a CAD file for a live quote.
Can FabDigit make parts in 7005?
Yes — 7005 is available for CNC machining and sheet metal; every part is priced by an engineer rather than instantly. Upload a STEP file to get a price and a DFM check.
Sources
- International Alloy Designations and Chemical Composition Limits for Wrought Aluminum (Teal Sheets) — The Aluminum Association (2018)
- EN 755-2 Aluminium and aluminium alloys — Extruded rod/bar, tube and profiles — Mechanical properties — CEN (2016)
- ASM Handbook Vol. 2 — Properties and Selection: Nonferrous Alloys — ASM International (1990)
- ASM Handbook Vol. 13B — Corrosion: Materials — ASM International (2005)
- Aluminum Standards and Data (mechanical property tables) — The Aluminum Association (2017)
Property data is compiled from published supplier and standards handbooks and normalised for comparison; hardness values on non-Brinell scales are converted approximately for charting only. Manufacturability limits are FabDigit quote-engine defaults and may be relaxed by engineering review. Nothing on this page is a certification — request mill certs, CoC or material test reports with your order.