Aluminum 7049-T7351
Temper
AA 7049 · UNS A97049 · EN AW-7049, AW 7049
T7351 = t73, stress relieved by stretching
Plate temper for machined structural parts where low residual stress and dimensional stability after heavy metal removal are required.
Values for the T7351 condition
Other 7049 tempers and conditions
7049 is listed in 5 conditions; see the grade overview at 7049.
Compare all 5 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
T7351This page T73, stress relieved by stretching | Plate temper for machined structural parts where low residual stress and dimensional stability after heavy metal removal are required. | 455 | 525 | 11 | 130 HB | 40 % IACS |
Overaged, stress-relieved by compression | Hand and die forgings that will be extensively machined; compression stress relief minimises distortion. | 460 | 530 | 10 | 132 HB | 40 % IACS |
Solution heat treated and overaged for stress-corrosion resistance | Standard condition for 7049 die forgings and bar: ~10 % below peak strength but very high resistance to stress-corrosion cracking. | 475 | 545 | 11 | 135 HB | 40 % IACS |
T74-type overage, stress-relieved by compression | Preferred temper for thick 7049 landing-gear forgings: strength between T76 and T73 with near-T73 SCC resistance and good short-transverse properties. | 485 | 550 | 10 | 137 HB | 39 % IACS |
Overaged for exfoliation-corrosion resistance | Intermediate overage: higher strength than T73 with good exfoliation-corrosion resistance but less SCC margin. | 505 | 565 | 10 | 140 HB | 38 % IACS |
What is 7049-T7351?
7049-T7351 is 7049 in the T7351 temper — plate temper for machined structural parts where low residual stress and dimensional stability after heavy metal removal are required. 7049-T7351 has a yield strength of 455 MPa (66 ksi) and a tensile strength of 525 MPa (76.1 ksi) — stronger than 92% of aluminum grades. Elongation at break is 11% and the elastic modulus is 71.7 GPa (10.4 Msi). 7049-T7351 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 — 455 MPa (66 ksi), better than 92% of aluminum grades
- Tough — resists crack growth — 34 MPa·√m (30.9 ksi·√in), better than 90% of aluminum grades
- Easy to machine — 74/100, better than 85% of aluminum grades
Limitations
- Difficult to weld — 15/100, worse than 96% of aluminum grades
7049-T7351 properties
Typical room-temperature values for 7049-T7351; 11 are specific to this condition. Other listed values are 7049 reference data and may not represent this condition. Bars are the position among aluminum grades.
Physical3
7049-T7351 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-T7351 has a yield strength of 455 MPa (66 ksi) and a tensile strength of 525 MPa (76.1 ksi) — stronger than 92% of aluminum grades. Elongation at break is 11% and the elastic modulus is 71.7 GPa (10.4 Msi).
Thermal6
7049-T7351 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-T7351 conducts electricity at 40 % IACS, better than 72% of aluminum grades.
Chemical & Environmental3
Corrosion resistance is fair (48/100), worse than 58% of aluminum grades.
Sustainability4
Producing a kilogram of 7049-T7351 takes about 215 MJ of energy and emits 13.5 kg of CO₂ — more than 93% of aluminum grades. Typical recycled content is 10%.
Manufacturability8
7049-T7351's machinability is very good (74/100, better than 85% of aluminum grades); weldability poor (15/100); formability poor (22/100).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with 7049-T7351
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-T7351 — frequently asked
What is 7049-T7351 used for?
7049-T7351 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-T7351?
7049-T7351 has a typical yield strength of 455 MPa (66 ksi) and a tensile strength of 525 MPa (76.1 ksi) — stronger than 92% of aluminum grades. Strength varies by condition: see the 5 listed tempers.
Is 7049-T7351 easy to machine?
Yes — machinability is rated very good (74/100, better than 85% 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-T7351 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-T7351?
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-T7351 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-T7351?
7049-T7351 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-T7351?
Yes — 7049-T7351 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)
- 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.