DIN 1725-1 Grade 3.4365 T73511

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Description

The alloy AlZnMgCu1,5 as a Cu-alloyed AlZnMg-alloy achieves highest strength values due to its composition. Strength grade F 55 is achievable by artificial aging. Heat-treatment for hardening: solution annealing: 470 to 480 °C quenching in water artificial aging: 12 to 24 h at 115 to 125 °C 4 to 6 h at 165 to 180 °C The artificial aging represents a two-step aging. Natural aging is unusual. The alloy has a favorable machinability and it is on certain conditions weldable. When welding appears a heat-affected zone of lower strength therefore welding should be avoided. A favorable corrosion resistance can only be warranted for an appropriate surface protection coat. Corrosion resistance can be considerably enhanced by artificial aging. In order to tap the full strength values, without having any negative effect of the lower corrosion resistance, the sheets of this alloy are cladded by rolling with e.g. AlZn1. Therby the application area expands considerably. Furthermore the alloy has a favorable machinability. Application: In machine engineering (incl. mold making) for appliances and tools. Predominantly as anchor, head and punch unit holder plates as well as for guide plates. In mold making esp. in plastics processing for blow, foam and injection forms, carrying constructions for woodworking tools, for machine benchings, turned parts (hydraulics/pneumatics), in vehicle manufacturing for bumper, safety parts. In aircraft construction as connecting elements (screws), in military engineering for bending and forming technics (as wire: springs, screens, hooks etc.).

Related Standards

Equivalent Materials

This material data has been provided by WIAM.

All metrics apply to room temperature unless otherwise stated. SI units used unless otherwise stated.
Equivalent standards are similar to one or more standards provided by the supplier. Some equivalent standards may be stricter whereas others may be outside the bounds of the original standard.

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Properties

General

PropertyTemperatureValue

Density

20.0 °C

2.8 g/cm³

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Mechanical

PropertyTemperatureValueComment

Bulk Modulus

20.0 °C

72.5 GPa

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Elastic modulus

20.0 °C

71 GPa

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Elongation

20.0 °C

6 - 7 %

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Elongation, transverse

20.0 °C

4 - 5 %

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Hardness, Brinell

20.0 °C

130 [-]

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Hardness, Brinell, trans

20.0 °C

130 - 150 [-]

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Plane-Strain Fracture Toughnes

20.0 °C

24 - 41.1 MPa·√m

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Poisson's ratio

23.0 °C

0.33 [-]

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Typical for Wrought 7000 Series Aluminium

Shear modulus

23.0 °C

26.4 - 27.1 GPa

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Typical for Wrought 7000 Series Aluminium

Tensile strength

20.0 °C

450 - 480 MPa

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Tensile strength, transverse

20.0 °C

450 - 520 MPa

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Yield strength Rp0.2

20.0 °C

400 - 420 MPa

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Yield strength Rp0.2, transverse

20.0 °C

400 - 440 MPa

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Thermal

PropertyTemperatureValueComment

Coefficient of thermal expansion

23.0 °C

2.1E-5 - 2.4E-5 1/K

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Typical for Wrought 7000 Series Aluminium

Melting point

465 - 655 °C

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Typical for Wrought 7000 Series Aluminium

Specific heat capacity

23.0 °C

795 - 1050 J/(kg·K)

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Typical for Wrought 7000 Series Aluminium

Thermal conductivity

23.0 °C

121 - 170 W/(m·K)

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Typical for Wrought 7000 Series Aluminium

Electrical

PropertyTemperatureValueComment

Electrical conductivity

23.0 °C

1.80E+7 - 3.40E+7 S/m

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Typical for Wrought 7000 Series Aluminium

Electrical resistivity

23.0 °C

2.9E-8 - 5.6E-8 Ω·m

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Typical for Wrought 7000 Series Aluminium

Chemical properties

PropertyValue

Chromium

0.18 - 0.28 %

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Copper

1.2 - 2 %

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Iron

0.5 %

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Magnesium

2.1 - 2.9 %

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Manganese

0.3 %

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Silicon

0.4 %

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Titanium

0.2 %

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Zinc

5.1 - 6.1 %

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Technological properties

Property
Brazing

Excellent