EN 1706 Grade AC-44400 F

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Description

Material EN AC-AlSi9 is produced as diecasting. It shows the following casting characteristics and properties: plasticity: excellent heat crack resistance: excellent pressure tightness: acceptable workability (after heat-treatment): acceptable corrosion resistance: acceptable decorative anodic oxidation: not advisable weldability: insufficient polishability: insufficient strength at room temperature: acceptable strength at increased temp. (up to 200°C): acceptable ductility (impact strength): acceptable fatigue strength amounts 60 to 90 N/mm² ( best available casting method, values for vibration durability up to 50*10 hoch 6 cycles [Woehler diagram]). Diecasting weldability depends on the embedded gas amount and is mostly insufficient. For certain casting methods are achievable good to acceptable values.

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Properties

General

Density

ρ

2.65 - 2.71 g/cm³ at 20 °C

Typical for Cast 4xx.x Series Aluminium

Mechanical

Elastic modulus

E

74 GPa at 20 °C

Show 4xx.x materials with Elastic modulus of 74 GPa at 20 °C

Elongation A50

A50

2 - 5 % at 20 °C

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Hardness, Brinell

HB

50 - 55 [-] at 20 °C

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Poisson's ratio

ν

0.33 [-] at 20 °C

Show 4xx.x materials with Poisson's ratio of 0.33 [-] at 20 °C

Typical for Cast 4xx.x Series Aluminium

Tensile strength

Rm

170 - 220 MPa at 20 °C

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Yield strength Rp0.2

Rp0.2

80 - 120 MPa at 20 °C

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Thermal

Coefficient of thermal expansion

α

2.1E-5 - 2.2E-5 1/K at 20 °C

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Melting point

Tm

550 - 600 °C

Specific heat capacity

cp

910 J/(kg·K) at 20 °C

Thermal conductivity

λ

130 - 150 W/(m·K) at 20 °C

Electrical

Electrical conductivity

σel

1.60E+7 - 2.20E+7 S/m at 20 °C

Electrical resistivity

ρel

4.55E-8 - 6.25E-8 Ω·m at 20 °C

Chemical properties

Element

Weight %

Comment

Other

-

each 0.05, total 0.15, Rest Al

Al

87.05 %

Si

8 - 11 %

Fe

0.65 %

Mn

0.5 %

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Technological properties

Anodizing

decorative: not recommended

Corrosion properties

general: acceptable

General machinability

after thermal treatment: acceptable

Processing methods

pressure die 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.