DIN 1725-1 Grade 3.4365 T6511

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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.).

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Equivalent Materials

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Properties

General

Density

ρ

2.8 g/cm³ at 20 °C

Mechanical

Bulk Modulus

K

72.5 GPa at 20 °C

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Elastic modulus

E

71 GPa at 20 °C

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Elongation

A

6 - 8 % at 20 °C

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Elongation, transverse

A

6 % at 20 °C

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Hardness, Brinell

HB

140 [-] at 20 °C

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Hardness, Brinell, trans

HB

150 [-] at 20 °C

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Plane-Strain Fracture Toughnes

KIC

29 - 29.7 MPa·√m at 20 °C

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Poisson's ratio

ν

0.33 [-] at 20 °C

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Typical for Wrought 7000 Series Aluminium

Shear modulus

G

26.4 - 27.1 GPa at 20 °C

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Typical for Wrought 7000 Series Aluminium

Tensile strength

Rm

520 - 540 MPa at 20 °C

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Tensile strength, transverse

Rm,trans

530 MPa at 20 °C

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Yield strength Rp0.2

Rp0.2

470 - 490 MPa at 20 °C

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Yield strength Rp0.2, transverse

Rp0.2,trans

450 MPa at 20 °C

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Thermal

Coefficient of thermal expansion

α

2.1E-5 - 2.4E-5 1/K at 20 °C

Typical for Wrought 7000 Series Aluminium

Specific heat capacity

cp

795 - 1050 J/(kg·K) at 20 °C

Typical for Wrought 7000 Series Aluminium

Thermal conductivity

λ

121 - 170 W/(m·K) at 20 °C

Typical for Wrought 7000 Series Aluminium

Electrical

Electrical conductivity

σel

1.80E+7 - 3.40E+7 S/m at 20 °C

Typical for Wrought 7000 Series Aluminium

Electrical resistivity

ρel

2.9E-8 - 5.6E-8 Ω·m at 20 °C

Typical for Wrought 7000 Series Aluminium

Chemical properties

Element

Weight %

Comment

Zn

5.1 - 6.1 %

Mg

2.1 - 2.9 %

Cu

1.2 - 2 %

Fe

0.5 %

Si

0.4 %

More

Technological properties

Brazing

Excellent

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.