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EN 573-3 Grade 3.1255 T451 – Premium Aluminum Alloy for Strength, Machinability, and Welding

DIN 3.1255 is an alloy with strength, machinability and welding capabilities, Aluminum Alloy DIN 3.1255 is an excellent option. It is a precipitation hardening alloy that maintains strength after heat treatment.

Properties

General

PropertyValueConditionRelated Standards

Density

2.8 g/cm³

T451

EN 573-3, EN 485, EN 754

Mechanical

PropertyValueConditionRelated StandardsComment

Bending angle 180°

3.0 °/t

T451

EN 573-3, EN 485

5.0 °/t

T451

EN 573-3, EN 485

Bending angle 90°

3.0 °/t

T451

EN 573-3, EN 485

5.0 °/t

T451

EN 573-3, EN 485

8.0 °/t

T451

EN 573-3, EN 485

Elastic modulus

73.0 GPa

T451

EN 573-3, EN 485, EN 754

Hardness, Brinell

110.0 [-]

T451

EN 573-3, EN 485

111.0 [-]

T451

EN 573-3, EN 485

112.0 [-]

T451

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

T451

EN 573-3, EN 485, EN 754

Tensile strength

380.0 MPa

T451

EN 573-3, EN 754

395.0 MPa

T451

EN 573-3, EN 485

400.0 MPa

T451

EN 573-3, EN 485

Thermal

PropertyTemperatureValueConditionRelated StandardsComment

Coefficient of thermal expansion

-50 °C

2.1e-05 1/K

T451

EN 573-3, EN 485, EN 754

20 °C

2.1e-05 1/K

T451

EN 573-3, EN 485, EN 754

20 °C

2.28e-05 1/K

T451

EN 573-3, EN 485, EN 754

20 °C

2.3e-05 1/K

T451

EN 573-3, EN 485, EN 754

20 °C

2.36e-05 1/K

T451

EN 573-3, EN 485, EN 754

20 °C

2.46e-05 1/K

T451

EN 573-3, EN 485, EN 754

100 °C

2.28e-05 1/K

T451

EN 573-3, EN 485, EN 754

100 °C

2.3e-05 1/K

T451

EN 573-3, EN 485, EN 754

200 °C

2.36e-05 1/K

T451

EN 573-3, EN 485, EN 754

300 °C

2.46e-05 1/K

T451

EN 573-3, EN 485, EN 754

Melting point

505.0 - 635.0 °C

T451

EN 573-3, EN 485, EN 754

510.0 - 640.0 °C

T451

EN 573-3, EN 485, EN 754

Specific heat capacity

816.0 - 963.0 J/(kg·K)

Typical for Wrought 2000 Series Aluminium

Thermal conductivity

134.0 - 193.0 W/(m·K)

T451

EN 573-3, EN 485, EN 754

140.0 - 200.0 W/(m·K)

T451

EN 573-3, EN 485, EN 754

Electrical

PropertyValueConditionRelated Standards

Electrical conductivity

20000000.0 - 29000000.0 S/m

T451

EN 573-3, EN 485, EN 754

21000000.0 - 24000000.0 S/m

T451

EN 573-3, EN 485, EN 754

Electrical resistivity

3.45e-08 - 5e-08 Ω·m

T451

EN 573-3, EN 485, EN 754

4.17e-08 - 4.76e-08 Ω·m

T451

EN 573-3, EN 485, EN 754

Chemical properties

PropertyValueConditionRelated Standards

Chromium

0.1 %

T451

EN 573-3, EN 485, EN 754

Copper

3.9 - 5.0 %

T451

EN 573-3, EN 485, EN 754

Iron

0.70 %

T451

EN 573-3, EN 485, EN 754

Magnesium

0.2 - 0.8 %

T451

EN 573-3, EN 485, EN 754

Manganese

0.4 - 1.2 %

T451

EN 573-3, EN 485, EN 754

Silicon

0.5 - 1.2 %

T451

EN 573-3, EN 485, EN 754

Titanium

0.15 %

T451

EN 573-3, EN 485, EN 754

Zinc

0.25 %

T451

EN 573-3, EN 485, EN 754

Technological properties

Property
Anodizing

decorative: not suitable, Protective: acceptable

Brazing

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

Corrosion properties

Seawater: sufficient, weathering: acceptable

Workability

Bending / Spinning (cold): gut (O) / ungeeignet, Impact extrusion (cold): not suitable, Deep drawing / upsetting (Condition) acceptable (O) / not suitable


Metal

  1. EN 573-3 Grade 3.4335 T451 Aluminium: Specifications & Mechanical Properties
  2. EN 573-3 Grade AW-6056 T451 Aluminium Alloy – High-Strength, Age-Hardenable
  3. EN 573-3 Grade 3.1325 T451 – Comprehensive Material Specifications & Mechanical Properties
  4. EN 573-3 Grade 3.2315 T451 – Premium Structural Steel for High-Performance Engineering
  5. EN 573-3 Grade 3.1255 T652 – High-Strength Aluminum Alloy with Superior Machinability and Weldability
  6. EN 573-3 Grade 3.1255 H111 – Premium High‑Strength Aluminum Alloy
  7. EN 573-3 Grade 3.1255 T351 – High-Strength Aluminum Alloy
  8. EN 573-3 Grade 3.1255 T3510: High-Strength Precipitation Hardened Aluminum Alloy
  9. EN 573-3 Grade 3.1255 T3511 Aluminum Alloy – High Strength & Weldability
  10. EN 573-3 Grade 3.1255 (T4510) – High-Performance Aluminum Alloy