2A70 Aircraft Aerospace Grade Aluminum Plate Sheet

2A70 aluminum alloy is an aluminum alloy with high plasticity, easy forging and punching. High-strength forged aluminum has high plasticity in the hot state and is easy to forge. Stamping; it can be strengthened by heat treatment, and its strength after quenching and artificial aging is similar to that of duralumin; the process performance is better, but there is an extrusion effect, so longitudinal and transverse The performance is different; the corrosion resistance is better, but there is a tendency of intergranular corrosion; the machinability is good, resistance welding, spot welding, seam welding performance is good, arc welding and gas welding performance is not good.2A70 Aircraft aerospace grade aluminum plate sheet is normally used on precision parts machining, aluminum CNC parts etc.

2A70 Aircraft Aerospace Grade Aluminum plate sheet

2A70 Aircraft Aerospace Grade Aluminum plate sheet

Alloy

Alloy series

Main Features

2A70

Al-Cu-Mg-Ni

Heat treatment strengthened alloy, Al-Cu-Mg-Si heat treated aluminum alloy, heat resistant alloy used in artificial aging, and 2A70, 2A80 and 2A90 alloy used in aviation industry. 2A70 alloy has the highest heat resistance, the most widely applied and the applied temperature is 200~250 C. the alloy has good technological characteristics, and can be processed into plates, strips, rods, profiles and free forgings, die forgings and so on. In aircraft manufacturing, it is mostly used for forging engine piston, impeller, wheel, compressor blade, and other parts used at high temperature.

                                    Mechanical properties of stabilized treatment of 2A70  

Type

Stabilized treatment

Rm/Mpa

Rp0.2/Mpa

A/%

Type

Stabilized treatment

Rm/Mpa

Rp0.2/Mpa

A/%

θ/℃

t/h

θ/℃

t/h

Aluminum sheet

125

1000

363

324

9

Forgings sheet stock

175

100

333

8

5000

363

9

1000

333

9

10000

363

314

8

5000

314

9

20000

363

294

7

10000

304

8

150

100

402

343

20000

275

7

1000

412

363

5

30000

265

8

5000

382

333

6

195

100

314

10

10000

314

284

8

1000

284

10

20000

314

294

8

5000

275

12

175

10

402

343

6

10000

255

12

100

392

338

5

20000

245

12

1000

392

324

6

30000

245

12

200

10

412

353

5

Extrusion aluminum profile

125

100

402

373

7.5

100

373

314

6

1000

402

373

7.5

Influence of temperature on mechanical properties of 2A70 alloy

Type

Temper

Δ /mm

Θ/℃

Rm/Mpa

Rp0.2/Mpa

A5/%

Aluminum sheet

T6

1.5~2

-196

500

412

13

-70

420

353

7

20

387

343

7

125

363

333

7

150

363

323

9

175

323

194

11

200

304

255

14

250

235

186

19

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