Aluminum 7049 · precip hard
Aluminum 7049-T7452
Properties of the T7452 condition, compared with the other 7049 tempers.
Preferred temper for thick 7049 landing-gear forgings: strength between T76 and T73 with near-T73 SCC resistance and good short-transverse properties.
What is 7049-T7452?
7049-T7452 is 7049 in the T7452 condition — preferred temper for thick 7049 landing-gear forgings: strength between T76 and T73 with near-T73 SCC resistance and good short-transverse properties. 7049-T7452 has a yield strength of 485 MPa (70.3 ksi) and a tensile strength of 550 MPa (79.8 ksi) — stronger than 95% of aluminum grades. Elongation at break is 10% and the elastic modulus is 71.7 GPa (10.4 Msi). 7049-T7452 has a density of 2.84 g/cm³ (0.103 lb/in³), heavier than 93% of aluminum grades. It melts at 477°C (891 °F).
Advantages
- High strength — 485 MPa (70.3 ksi), better than 95% of aluminum grades
- Tough — resists crack growth — 32 MPa·√m (29.1 ksi·√in), better than 83% of aluminum grades
- Easy to machine — 72/100, better than 80% of aluminum grades
Limitations
- Difficult to weld — 15/100, worse than 96% of aluminum grades
7049-T7452 properties
Typical room-temperature values for 7049-T7452 — 8 properties are specific to this condition; the rest are grade-level values shared by every 7049 temper. Each bar shows where the value sits among the aluminum grades in FabDigit's library — further right is higher.
Physical3
7049-T7452 has a density of 2.84 g/cm³ (0.103 lb/in³), heavier than 93% of aluminum grades. It melts at 477°C (891 °F).
Mechanical14
7049-T7452 has a yield strength of 485 MPa (70.3 ksi) and a tensile strength of 550 MPa (79.8 ksi) — stronger than 95% of aluminum grades. Elongation at break is 10% and the elastic modulus is 71.7 GPa (10.4 Msi).
Thermal6
7049-T7452 is rated for continuous service to 150°C (302 °F). It conducts heat at 154 W/m·K (89 BTU/hr·ft·°F), better than 68% of aluminum grades. Thermal expansion is 23.4 µm/m·K (13 µin/in·°F).
Electrical3
7049-T7452 conducts electricity at 39 % IACS, better than 65% of aluminum grades.
Chemical & Environmental3
Corrosion resistance is fair (46/100), worse than 59% of aluminum grades.
Sustainability4
Producing a kilogram of 7049-T7452 takes about 215 MJ of energy and emits 13.5 kg of CO₂ — more than 92% of aluminum grades. Typical recycled content is 10%.
Manufacturability8
7049-T7452's machinability is very good (72/100, better than 80% of aluminum grades); weldability poor (15/100); formability poor (22/100).
Values are nominal handbook figures for design screening. Certified mill or lot data ships with every FabDigit order on request.
Other 7049 tempers and conditions
7049 is also supplied in 4 other conditions. The full side-by-side table is on the 7049 overview.
- T7452Preferred temper for thick 7049 landing-gear forgings: strength between T76 and T73 with near-T73 SCC resistance and good short-transverse properties.485 MPa yield · 137 HB
- T73Standard condition for 7049 die forgings and bar: ~10 % below peak strength but very high resistance to stress-corrosion cracking.475 MPa yield · 135 HB
- T7352Hand and die forgings that will be extensively machined; compression stress relief minimises distortion.460 MPa yield · 132 HB
- T7351Plate temper for machined structural parts where low residual stress and dimensional stability after heavy metal removal are required.455 MPa yield · 130 HB
Working with 7049-T7452
Is 7049 easy to machine?
Machines well in the overaged tempers with sharp carbide tools, high speed and flood coolant; chips are tough so use polished flutes and generous rake to avoid built-up edge.
Can 7049 be welded?
Not weldable by fusion processes (hot cracking and loss of SCC resistance); join by fasteners, adhesive bonding or friction stir with qualified procedures.
Can 7049 be formed, bent or molded?
Hot-work / forge at about 350–440 °C; cold forming in T73-type tempers is very limited — form in the solution-treated (W) state or before ageing.
What surface finishes work on 7049?
Chromic or sulfuric anodize plus primer for aerospace corrosion protection; keep parts insulated from steel and carbon composites, and shot-peen critical machined surfaces for fatigue life.
7049 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 |
|---|---|---|
| Zn | 7.2 – 8.2 | 7.7 |
| Mg | 2 – 2.9 | 2.45 |
| Cu | 1.2 – 1.9 | 1.55 |
| Crgrain-boundary/quench-sensitivity control | 0.1 – 0.22 | 0.16 |
| Fe | ≤ 0.35 | — |
| Si | ≤ 0.25 | — |
| Mn | ≤ 0.2 | — |
| Ti | ≤ 0.1 | — |
| Others (each)0.15 total | ≤ 0.05 | — |
| Al | balance | — |
7049-T7452 — frequently asked
What is 7049-T7452 used for?
7049-T7452 is typically used for aircraft landing gear forgings, airframe fittings and lugs, support arms and links, thick-section closed-die forgings, hand (open-die) forgings and thick plate for machined structural parts. In short: high-strength aerospace forging.
What is the yield strength of 7049-T7452?
7049-T7452 has a typical yield strength of 485 MPa (70.3 ksi) and a tensile strength of 550 MPa (79.8 ksi) — stronger than 95% of aluminum grades. Strength varies by condition: see the 5 listed tempers.
Is 7049-T7452 easy to machine?
Yes — machinability is rated very good (72/100, better than 80% of aluminum grades). Machines well in the overaged tempers with sharp carbide tools, high speed and flood coolant; chips are tough so use polished flutes and generous rake to avoid built-up edge.
Can 7049-T7452 be welded?
Not readily — weldability is rated poor (15/100). Not weldable by fusion processes (hot cracking and loss of SCC resistance); join by fasteners, adhesive bonding or friction stir with qualified procedures.
What surface finishes work on 7049-T7452?
Chromic or sulfuric anodize plus primer for aerospace corrosion protection; keep parts insulated from steel and carbon composites, and shot-peen critical machined surfaces for fatigue life.
Can 7049-T7452 be formed, bent or molded?
Hot-work / forge at about 350–440 °C; cold forming in T73-type tempers is very limited — form in the solution-treated (W) state or before ageing.
What is the maximum service temperature of 7049-T7452?
7049-T7452 is rated for continuous use to about 150°C (302 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
Can FabDigit make parts in 7049-T7452?
Yes — 7049-T7452 is available for CNC machining and sheet metal with instant online pricing. 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)
- ASM Handbook Vol. 2 — Properties and Selection: Nonferrous Alloys and Special-Purpose Materials — ASM International (1990)
- ASM Handbook Vol. 19 — Fatigue and Fracture — ASM International (1996)
- MMPDS — Metallic Materials Properties Development and Standardization — FAA/Battelle (2023)
- AMS 4111 / AMS-QQ-A-367 aluminium forging specifications — SAE International (2019)
Property data is compiled from published supplier and standards handbooks and normalised for comparison. Nothing on this page is a certification — request mill certs, CoC or material test reports with your order.