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High-Strength T851 Aluminum Alloy – EN 573-3 Grade 3.1355

Aluminum DIN 3.1355, known for its use in aircraft industry, is an alloy that offers excellent strength. When in the annealed condition it is readily formed and has good machinability. Though it has a relatively low level of corrosion resistance, it can be machined to a high finish.

Properties

General

PropertyValueConditionRelated Standards

Density

2.77 g/cm³

T851

EN 573-3, EN 485, EN 754

2.78 g/cm³

T851

EN 573-3, EN 485, EN 754

Mechanical

PropertyValueConditionRelated StandardsComment

Bending angle 90°

5.0 °/t

T851

EN 573-3, EN 485

7.0 °/t

T851

EN 573-3, EN 485

Elastic modulus

73.0 GPa

T851

EN 573-3, EN 485, EN 754

Hardness, Brinell

136.0 [-]

T851

EN 573-3, EN 485

137.0 [-]

T851

EN 573-3, EN 485

138.0 [-]

T851

EN 573-3, EN 485

Plane-Strain Fracture Toughnes

22.0 - 35.0 MPa·√m

Typical for Wrought 2000 Series Aluminium

Poisson's ratio

0.33 [-]

Typical for Wrought 2000 Series Aluminium

Shear modulus

27.4 GPa

T851

EN 573-3, EN 485, EN 754

Tensile strength

455.0 MPa

T851

EN 573-3, EN 485, EN 754

460.0 MPa

T851

EN 573-3, EN 485

Thermal

PropertyTemperatureValueConditionRelated Standards

Coefficient of thermal expansion

-50 °C

2.11e-05 1/K

T851

EN 573-3, EN 485, EN 754

20 °C

2.11e-05 1/K

T851

EN 573-3, EN 485, EN 754

20 °C

2.2899999999999998e-05 1/K

T851

EN 573-3, EN 485, EN 754

20 °C

2.3199999999999998e-05 1/K

T851

EN 573-3, EN 485, EN 754

20 °C

2.38e-05 1/K

T851

EN 573-3, EN 485, EN 754

20 °C

2.4699999999999997e-05 1/K

T851

EN 573-3, EN 485, EN 754

100 °C

2.2899999999999998e-05 1/K

T851

EN 573-3, EN 485, EN 754

100 °C

2.3199999999999998e-05 1/K

T851

EN 573-3, EN 485, EN 754

200 °C

2.38e-05 1/K

T851

EN 573-3, EN 485, EN 754

300 °C

2.4699999999999997e-05 1/K

T851

EN 573-3, EN 485, EN 754

Melting point

505.0 - 640.0 °C

T851

EN 573-3, EN 485, EN 754

505.0 - 635.0 °C

T851

EN 573-3, EN 485, EN 754

Specific heat capacity

875.0 J/(kg·K)

T851

EN 573-3, EN 485, EN 754

Thermal conductivity

121.0 - 193.0 W/(m·K)

T851

EN 573-3, EN 485, EN 754

130.0 - 150.0 W/(m·K)

T851

EN 573-3, EN 485, EN 754

Electrical

PropertyValueConditionRelated Standards

Electrical conductivity

17000000.0 - 29000000.0 S/m

T851

EN 573-3, EN 485, EN 754

18000000.0 - 21000000.0 S/m

T851

EN 573-3, EN 485, EN 754

Electrical resistivity

3.45e-08 - 5.88e-08 Ω·m

T851

EN 573-3, EN 485, EN 754

4.76e-08 - 5.56e-08 Ω·m

T851

EN 573-3, EN 485, EN 754

Chemical properties

PropertyValueConditionRelated Standards

Chromium

0.1 %

T851

EN 573-3, EN 485, EN 754

Copper

3.8 - 4.9 %

T851

EN 573-3, EN 485, EN 754

Iron

0.50 %

T851

EN 573-3, EN 485, EN 754

Magnesium

1.2 - 1.8 %

T851

EN 573-3, EN 485, EN 754

Manganese

0.3 - 0.9 %

T851

EN 573-3, EN 485, EN 754

Silicon

0.5 %

T851

EN 573-3, EN 485, EN 754

Titanium

0.15 %

T851

EN 573-3, EN 485, EN 754

Zinc

0.25 %

T851

EN 573-3, EN 485, EN 754

Technological properties

Property
Anodizing

decorative: not suitable, Protective: good

Brazing

hard brazing (with flux/ without flux): not suitable / not suitable, friction soldering: acceptable, soft brazing with flux: not suitable

Corrosion properties

Seawater: poor, weathering: poor

Workability

Bending / Spinning (cold): sufficient (O) / acceptable (O), Impact extrusion (cold): acceptable (O), Deep drawing / upsetting (Condition) acceptable (O) / sufficient (O)


Metal

  1. EN 573-3 Grade 3.1355 F Aluminum Alloy – Aircraft-Grade Strength & Machinability
  2. EN 573-3 Grade 3.1355 H18 – High‑Strength Aluminum Alloy for Aerospace Applications
  3. EN 573-3 Grade 3.1355 O3 Aluminum Alloy – Aircraft‑Grade Strength & Machinability
  4. EN 573-3 Grade 3.1355 H13 Aluminum – High Strength, Formability & Machinability
  5. EN 573-3 Grade 3.1355 H111 – High-Strength Aluminum Alloy for Aerospace Applications
  6. EN 573-3 Grade 3.1355 T3510 Aluminum Alloy – Aircraft‑Grade Strength & Machinability
  7. EN 573-3 Grade 3.1355 T3511 Aluminum Alloy – High Strength for Aerospace Applications
  8. EN 573-3 Grade 3.1355 T651 – High-Strength Aluminum Alloy for Aerospace
  9. EN 573-3 Grade 3.1355 T8510 – Premium Aircraft‑Grade Aluminum Alloy
  10. EN 573-3 Grade 3.1355 T8 Aluminum Alloy – High Strength, Excellent Machinability