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EN 573-3 Grade 3.1355 T42 Aluminum Alloy – High Strength & Machinability for Aerospace

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

T42

EN 573-3, EN 485, EN 603

2.78 g/cm³

T42

EN 573-3, EN 485, EN 603

Mechanical

PropertyValueConditionRelated StandardsComment

Elastic modulus

73.0 GPa

T42

EN 573-3, EN 485, EN 603

Hardness, Brinell

118.0 [-]

T42

EN 573-3, EN 485

119.0 [-]

T42

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

T42

EN 573-3, EN 485, EN 603

Tensile strength

420.0 MPa

T42

EN 573-3, EN 603

425.0 MPa

T42

EN 573-3, EN 485

Thermal

PropertyTemperatureValueConditionRelated Standards

Coefficient of thermal expansion

-50 °C

2.11e-05 1/K

T42

EN 573-3, EN 485, EN 603

20 °C

2.11e-05 1/K

T42

EN 573-3, EN 485, EN 603

20 °C

2.2899999999999998e-05 1/K

T42

EN 573-3, EN 485, EN 603

20 °C

2.3199999999999998e-05 1/K

T42

EN 573-3, EN 485, EN 603

20 °C

2.38e-05 1/K

T42

EN 573-3, EN 485, EN 603

20 °C

2.4699999999999997e-05 1/K

T42

EN 573-3, EN 485, EN 603

100 °C

2.2899999999999998e-05 1/K

T42

EN 573-3, EN 485, EN 603

100 °C

2.3199999999999998e-05 1/K

T42

EN 573-3, EN 485, EN 603

200 °C

2.38e-05 1/K

T42

EN 573-3, EN 485, EN 603

300 °C

2.4699999999999997e-05 1/K

T42

EN 573-3, EN 485, EN 603

Melting point

505.0 - 640.0 °C

T42

EN 573-3, EN 485, EN 603

505.0 - 635.0 °C

T42

EN 573-3, EN 485, EN 603

Specific heat capacity

875.0 J/(kg·K)

T42

EN 573-3, EN 485, EN 603

Thermal conductivity

121.0 - 193.0 W/(m·K)

T42

EN 573-3, EN 485, EN 603

130.0 - 150.0 W/(m·K)

T42

EN 573-3, EN 485, EN 603

Electrical

PropertyValueConditionRelated Standards

Electrical conductivity

17000000.0 - 29000000.0 S/m

T42

EN 573-3, EN 485, EN 603

18000000.0 - 21000000.0 S/m

T42

EN 573-3, EN 485, EN 603

Electrical resistivity

3.45e-08 - 5.88e-08 Ω·m

T42

EN 573-3, EN 485, EN 603

4.76e-08 - 5.56e-08 Ω·m

T42

EN 573-3, EN 485, EN 603

Chemical properties

PropertyValueConditionRelated Standards

Chromium

0.1 %

T42

EN 573-3, EN 485, EN 603

Copper

3.8 - 4.9 %

T42

EN 573-3, EN 485, EN 603

Iron

0.50 %

T42

EN 573-3, EN 485, EN 603

Magnesium

1.2 - 1.8 %

T42

EN 573-3, EN 485, EN 603

Manganese

0.3 - 0.9 %

T42

EN 573-3, EN 485, EN 603

Silicon

0.5 %

T42

EN 573-3, EN 485, EN 603

Titanium

0.15 %

T42

EN 573-3, EN 485, EN 603

Zinc

0.25 %

T42

EN 573-3, EN 485, EN 603

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 3.1325 T42 Aluminium – Properties & Standards
  5. EN 573-3 Grade 3.2315 T42: Premium Aluminium with Superior Mechanical Properties
  6. EN 573-3 Grade 3.1355 H13 Aluminum – High Strength, Formability & Machinability
  7. EN 573-3 Grade 3.1355 H111 – High-Strength Aluminum Alloy for Aerospace Applications
  8. EN 573-3 Grade 3.1355 T3510 Aluminum Alloy – Aircraft‑Grade Strength & Machinability
  9. EN 573-3 Grade 3.1355 T3511 Aluminum Alloy – High Strength for Aerospace Applications
  10. EN 573-3 Grade 3.1355 T8 Aluminum Alloy – High Strength, Excellent Machinability