1 November 2021 2000 Series Aluminum Alloy
2297 Aluminum Alloy Plate
2297-T87 aluminum alloy is a low density aluminium-based alloy, developed to provide high toughness, combined with an improved fatigue and damage tolerance balance versus incumbent alloys. Spectrum fatigue is typically 3 to 5 times higher than current available solutions, and those mechanical properties are achieved at a lower density. This product is also characterized by 8% higher modulus of elasticity and high corrosion resistance. Leveraging aluminium’s infinite recyclability without property losses, 2297-T87 aluminum alloy can be repeatedly recycled.
Chemical Composition:
| Chemical Element | Weight% |
|---|---|
| Si | 0.10 max |
| Fe | 0.10 max |
| Cu | 2.5 - 3.10 |
| Mn | 0.10 - 0.50 |
| Mg | 0.25 max |
| Li | 1.1 - 1.7 |
| Zr | 0.08 - 0.15 |
Mechanical Properties:
| Thickness mm (in) | DIR | 38.1 ≤ th ≤ 50.8 (1.5 ≤ th ≤ 2) | 50.9 ≤ th ≤ 63.4 (2.001 ≤ th ≤ 2.5) | 63.5 ≤ th ≤ 76.2 (2.501 ≤ th ≤ 3) | 76.2 ≤ th ≤ 101.6 (3.001 ≤ th ≤ 4) | 101.6 ≤ th ≤ 127 (4.001 ≤ th ≤ 5) | 127 ≤ th ≤ 152 (5.001 ≤ th ≤ 6) | |
|---|---|---|---|---|---|---|---|---|
| Tensile strength MPa (ksi) | L | min | 441 (64) | 434 (63) | 427 (62) | 427 (62) | 421 (61) | 414 (60) |
| Yield strength MPa (ksi) | L | min | 400 (58) | 393 (57) | 393 (57) | 393 (57) | 386 (56) | 379 (55) |
| Elongation % | L | min | 10 | 9 | 9 | 5 | 5 | 5 |
| Toughness K1c MPa√m (ksi√in) | L-T | Typ. | 35.2 (32) | 35.2 (32) | 35.2 (32) | 34.1 (31) | 33 (30) | 31.9 (29) |
| E (tension) Gpa (Msi) | L | Typ. | 75.2 (10.9) | |||||
| Stress Corrosion Cracking MPa (ksi) aSTM G47 | ST | max | 207 (30) | |||||
| Density g/cm³ (lb/in³) | Typ. | 2.65 (0.096) | ||||||
Application:
2297-T87 aluminum alloy plates are especially suited for fatigue critical components. Moderate strength level with high damage tolerance and corrosion characteristics make it very attractive for frames, spars and bulkheads. It has been successfully utilized in applications which require cyclic exposure to elevated temperature, in the 110 °C (230 °F) range. 2297-T87 aluminum alloy plates were also used successfully for space applications which take advantage of the lower density and high modulus.
Temper:
2297-T87 aluminum alloy temper is obtained through a conventional one step aging treatment as defined in AMS 2772. Thermal cycle was optimised to provide a balance of static strength and damage tolerance with excellent stress corrosion resistance.