Aluminum 4043-H18
Categories: Metal; Nonferrous Metal; Aluminum Alloy; 4000 Series Aluminum Alloy

Material Notes: Data points with the AA note have been provided by the Aluminum Association, Inc. and are NOT FOR DESIGN.

Composition Notes:
Composition information provided by the Aluminum Association and is not for design.

Key Words: UNS A94043; ISO AlSi5; Aluminium 4043-H18; AA4043-H18; Al4043-H18
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Physical PropertiesMetricEnglishComments
Density 2.69 g/cc0.0972 lb/in³AA; Typical
 
Mechanical PropertiesMetricEnglishComments
Elongation at Break 0.50 %
@Diameter 1.60 mm
0.50 %
@Diameter 0.0630 in
in 5 cm, wire
Shear Strength 170 MPa24700 psiCalculated value.
Tensile Strength, Ultimate 285 MPa41300 psi
Hardness, Brinell 7777500 kg load with 10 mm ball. Calculated value.
Hardness, Knoop 100100Converted from Brinell Hardness Value
Hardness, Vickers 8787Converted from Brinell Hardness Value
Poissons Ratio 0.340.34Estimated from trends in similar Al alloys.
 
Electrical PropertiesMetricEnglishComments
Electrical Resistivity 0.00000440 ohm-cm0.00000440 ohm-cmEstimated from other heat treatments.
 
Thermal PropertiesMetricEnglishComments
CTE, linear  22.1 µm/m-°C
@Temperature 20.0 - 100 °C
12.3 µin/in-°F
@Temperature 68.0 - 212 °F
AA; Typical; average over range
 23.7 µm/m-°C
@Temperature 20.0 - 300 °C
13.2 µin/in-°F
@Temperature 68.0 - 572 °F
Melting Point 573.9 - 632 °C1065 - 1170 °FAA; Typical range based on typical composition for wrought products >= 1/4 in. thickness
Thermal Conductivity 150 W/m-K1040 BTU-in/hr-ft²-°FEstimated from other heat treatments.
Specific Heat Capacity 0.850 J/g-°C0.203 BTU/lb-°FEstimated from trends in similar Al alloys.
Solidus 573.9 °C1065 °FAA; Typical
Liquidus 632 °C1170 °FAA; Typical
 
Deposition PropertiesMetricEnglishComments
Annealing Temperature 349 °C660 °F
 
Component Elements PropertiesMetricEnglishComments
Aluminum, Al 92.3 - 95.5 %92.3 - 95.5 %As remainder
Beryllium, Be <= 0.0008 %<= 0.0008 %welding electrode and filler wire only
Copper, Cu <= 0.30 %<= 0.30 %
Iron, Fe <= 0.80 %<= 0.80 %
Magnesium, Mg <= 0.05 %<= 0.05 %
Manganese, Mn <= 0.05 %<= 0.05 %
Other, each <= 0.05 %<= 0.05 %
Other, total <= 0.15 %<= 0.15 %
Silicon, Si 4.5 - 6.0 %4.5 - 6.0 %
Titanium, Ti <= 0.20 %<= 0.20 %
Zinc, Zn <= 0.10 %<= 0.10 %

References for this datasheet.

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