Aluminum 7049A-T7351
Temper
AA 7049A · EN AlZn8MgCu, AW-7049A
T7351 = t73, stress relieved by stretching
Choose for plate and stretched bar that will be heavily machined and must combine SCC resistance with low distortion.
Values for the T7351 condition
Other 7049A tempers and conditions
7049A is listed in 7 conditions; see the grade overview at 7049A.
Compare all 7 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
Annealed | Interim condition only — used for severe forming or straightening before re-solution treating and ageing to a T6/T7 temper. | 115 | 250 | 16 | 65 HB | 45 % IACS |
T7351This page T73, stress relieved by stretching | Choose for plate and stretched bar that will be heavily machined and must combine SCC resistance with low distortion. | 460 | 530 | 9 | 133 HB | 40 % IACS |
Solution heat treated and overaged for stress-corrosion resistance | Use for thick forgings and fittings loaded in the short-transverse direction or exposed to salt spray, accepting ~15 % strength loss versus T6. | 465 | 535 | 9 | 135 HB | 40 % IACS |
Solution treated, mechanically stress-relieved (cold compression),… | Specified for large die forgings/hand forgings needing T73-level SCC resistance with residual stresses removed by cold compression rather than stretching. | 470 | 540 | 8 | 136 HB | 40 % IACS |
T6Default Solution heat treated and artificially aged | Pick for maximum static strength in forgings and extrusions where short-transverse sustained tensile stress and chloride exposure are controlled. | 570 | 640 | 7 | 150 HB | 37 % IACS |
Solution treated, stress-relieved by stretching, then artificially aged | Choose for straight, low-residual-stress extruded sections and rod that must hold tight machined tolerances without post-stretch straightening. | 570 | 635 | 7 | 150 HB | 37 % IACS |
T6, stress relieved by stretching, minor straightening | Standard commercial supply condition for long 7049A extrusions and drawn rod where slight straightening after stretching is allowed. | 570 | 635 | 7 | 150 HB | 37 % IACS |
What is 7049A-T7351?
7049A-T7351 is 7049A in the T7351 temper — choose for plate and stretched bar that will be heavily machined and must combine SCC resistance with low distortion. 7049A-T7351 has a yield strength of 460 MPa (66.7 ksi) and a tensile strength of 530 MPa (76.9 ksi) — stronger than 92% of aluminum grades. Elongation at break is 9% and the elastic modulus is 71 GPa (10.3 Msi). 7049A-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). T6 is the default condition FabDigit quotes; T7351 is available on request or by drawing note.
Advantages
- High strength — 460 MPa (66.7 ksi), better than 92% of aluminum grades
- Tough — resists crack growth — 34 MPa·√m (30.9 ksi·√in), better than 90% of aluminum grades
Limitations
- Difficult to weld — 12/100, worse than 98% of aluminum grades
7049A-T7351 properties
Typical room-temperature values for 7049A-T7351; 12 are specific to this condition. Other listed values are 7049A reference data and may not represent this condition. Bars are the position among aluminum grades.
Physical3
7049A-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
7049A-T7351 has a yield strength of 460 MPa (66.7 ksi) and a tensile strength of 530 MPa (76.9 ksi) — stronger than 92% of aluminum grades. Elongation at break is 9% and the elastic modulus is 71 GPa (10.3 Msi).
Thermal6
7049A-T7351 is rated for continuous service to 150°C (302 °F). It conducts heat at 155 W/m·K (89.6 BTU/hr·ft·°F), better than 71% of aluminum grades. Thermal expansion is 23.4 µm/m·K (13 µin/in·°F).
Electrical3
7049A-T7351 conducts electricity at 40 % IACS, better than 72% of aluminum grades.
Chemical & Environmental3
Corrosion resistance is fair (50/100), worse than 56% of aluminum grades.
Sustainability4
Producing a kilogram of 7049A-T7351 takes about 205 MJ of energy and emits 12.5 kg of CO₂ — more than 76% of aluminum grades. Typical recycled content is 8%.
Manufacturability8
7049A-T7351's machinability is good (63/100, better than 58% of aluminum grades); weldability not recommended (12/100); formability poor (18/100).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with 7049A-T7351
Is 7049A easy to machine?
Machines well in T6/T73 with sharp carbide (polished flutes, high rake), 300–900 m/min and copious lubrication; deep pockets in T6 can distort, so prefer stress-relieved T6511/T7351/T7452 stock and rough-then-finish sequencing.
Can 7049A be welded?
Not arc weldable — Cu-bearing 7000-series cracks and loses SCC resistance in the HAZ; join by fasteners, adhesive bonding, or friction-stir/electron-beam with qualified procedures only.
Can 7049A be formed, bent or molded?
Hot forge/extrude at roughly 350–440 °C then solution treat (~470 °C) and quench; cold forming in T6 is impractical, so form in O temper or as-quenched W condition and age afterwards.
What surface finishes work on 7049A?
Standard finishes are chromic/sulfuric or hard anodize plus primer; chemical conversion coating (Alodine) for electrical bonding, and shot peening of machined fillets is common to offset SCC and fatigue sensitivity.
7049A 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 | ≤ 0.4 | — |
| Fe | ≤ 0.5 | — |
| Cu | 1.2 – 1.9 | 1.5 |
| Mn | ≤ 0.5 | — |
| Mg | 2.1 – 3.1 | 2.6 |
| Cr | 0.05 – 0.25 | 0.15 |
| Zn | 7.2 – 8.4 | 7.8 |
| TiTi + Zr combined limit 0.25 max | ≤ 0.25 | — |
| Others (each) | ≤ 0.05 | — |
| Others (total) | ≤ 0.15 | — |
| Al | balance | — |
7049A-T7351 — frequently asked
What is 7049A-T7351 used for?
7049A-T7351 is typically used for aircraft landing gear, high-strength structural forgings and military aerospace components. In short: highest-strength 7000-series forging alloy; T73 for SCC resistance; aerospace forging grade.
What is the yield strength of 7049A-T7351?
7049A-T7351 has a typical yield strength of 460 MPa (66.7 ksi) and a tensile strength of 530 MPa (76.9 ksi) — stronger than 92% of aluminum grades. Strength varies by condition: see the 7 listed tempers.
Is 7049A-T7351 easy to machine?
Reasonably — machinability is rated good (63/100, better than 58% of aluminum grades). Machines well in T6/T73 with sharp carbide (polished flutes, high rake), 300–900 m/min and copious lubrication; deep pockets in T6 can distort, so prefer stress-relieved T6511/T7351/T7452 stock and rough-then-finish sequencing.
Can 7049A-T7351 be welded?
Not readily — weldability is rated not recommended (12/100). Not arc weldable — Cu-bearing 7000-series cracks and loses SCC resistance in the HAZ; join by fasteners, adhesive bonding, or friction-stir/electron-beam with qualified procedures only.
What surface finishes work on 7049A-T7351?
Standard finishes are chromic/sulfuric or hard anodize plus primer; chemical conversion coating (Alodine) for electrical bonding, and shot peening of machined fillets is common to offset SCC and fatigue sensitivity.
Can 7049A-T7351 be formed, bent or molded?
Hot forge/extrude at roughly 350–440 °C then solution treat (~470 °C) and quench; cold forming in T6 is impractical, so form in O temper or as-quenched W condition and age afterwards.
What is the maximum service temperature of 7049A-T7351?
7049A-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.
What is the difference between 7049A-T6 and 7049A-O?
T6 is the default condition — pick for maximum static strength in forgings and extrusions where short-transverse sustained tensile stress and chloride exposure are controlled. O: interim condition only — used for severe forming or straightening before re-solution treating and ageing to a T6/T7 temper. Yield strength is 570 MPa in T6 versus 115 MPa in O.
Sources
- EN 573-3 Aluminium and aluminium alloys — Chemical composition of wrought products — CEN (2019)
- EN 755-2 Aluminium alloy extruded rod/bar, tube and profiles — Mechanical properties — CEN (2016)
- EN 586-2 Aluminium and aluminium alloys — Forgings, mechanical properties — CEN (1994)
- 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 — ASM International (1990)
- ASM Handbook Vol. 19 — Fatigue and Fracture — ASM International (1996)
- MMPDS-17 typical property tables for 7000-series forging and extrusion alloys — Battelle/FAA (2022)
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.