EN 1706 Grade AC-21000 T4

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Description

Material EN AC-Al Cu4MgTi is produced as sand, chilled and precision casting. It shows the following casting characteristics and properties: plasticity: acceptable heat crack resistance: insufficient pressure tightness: insufficient workability (casting condition): excellent corrosion resistance: insufficient decorative anodic oxidation: acceptable weldability: insufficient polishability:good strength at room temperature: excellent strength at increased temp. (up to 200°C): good ductility (impact strength): excellent fatigue strength amounts 80 to 110 N/mm² ( best available casting method, values for vibration durability up to 50*10 hoch 6 cycles [Woehler diagram]). To the comparable DIN-mark G-AlCu4TiMg, mat. No. 3.1371, acc. to DIN 1725-2 : 1986-02 applies: The alloy has a wide solidification interval, castability is more complicate. It is applied cold or warm hardened and suitable for casting parts of highest strength ( warm hardened) or highest ductility (cold hardened). Application: Wear resistant construction parts in engine, machine, vehicle and aircraft construction.

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Properties

General

Density

ρ

2.75 g/cm³ at 20 °C

Mechanical

Elastic modulus

E

72 GPa at 20 °C

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Elongation A50

A50

5 - 8 % at 20 °C

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Hardness, Brinell

HB

90 [-] at 20 °C

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Poisson's ratio

ν

0.33 [-] at 20 °C

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Typical for Cast 2xx.x Series Aluminium

Tensile strength

Rm

300 - 320 MPa at 20 °C

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Yield strength Rp0.2

Rp0.2

200 - 220 MPa at 20 °C

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Thermal

Coefficient of thermal expansion

α

2.3E-5 1/K at 20 °C

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Melting point

Tm

540 - 640 °C

Specific heat capacity

cp

910 J/(kg·K) at 20 °C

Thermal conductivity

λ

120 - 150 W/(m·K) at 20 °C

Electrical

Electrical conductivity

σel

1.60E+7 - 2.30E+7 S/m at 20 °C

Electrical resistivity

ρel

4.35E-8 - 6.25E-8 Ω·m at 20 °C

Chemical properties

Element

Weight %

Comment

Other

-

each 0.03, total 0.10, Rest Al

Al

93.35 %

Cu

4.2 - 5 %

Fe

0.35 %

Si

0.2 %

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Technological properties

Anodizing

decorative: acceptable

Corrosion properties

general: not sufficient

General machinability

as cast: excellent

Processing methods

investment casting, separately cast test sample

This material data has been provided by WIAM,AluKey.

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.