Aluminum 4043-H18

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 Properties	Metric	English	Comments

Density	2.69 g/cc	0.0972 lb/in³	AA; Typical

Mechanical Properties	Metric	English	Comments
Hardness, Brinell	77	77	500 kg load with 10 mm ball. Calculated value.
Hardness, Knoop	100	100	Converted from Brinell Hardness Value
Hardness, Vickers	87	87	Converted from Brinell Hardness Value
Tensile Strength, Ultimate	285 MPa	41300 psi
Tensile Strength, Yield	270 MPa	39200 psi
Elongation at Break	0.50 % @Diameter 1.60 mm	0.50 % @Diameter 0.0630 in	in 5 cm, wire
Poissons Ratio	0.34	0.34	Estimated from trends in similar Al alloys.
Shear Strength	170 MPa	24700 psi	Calculated value.

Electrical Properties	Metric	English	Comments
Electrical Resistivity	0.00000440 ohm-cm	0.00000440 ohm-cm	Estimated from other heat treatments.

Thermal Properties	Metric	English	Comments
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
Specific Heat Capacity	0.850 J/g-°C	0.203 BTU/lb-°F	Estimated from trends in similar Al alloys.
Thermal Conductivity	150 W/m-K	1040 BTU-in/hr-ft²-°F	Estimated from other heat treatments.
Melting Point	573.9 - 632 °C	1065 - 1170 °F	AA; Typical range based on typical composition for wrought products >= 1/4 in. thickness
Solidus	573.9 °C	1065 °F	AA; Typical
Liquidus	632 °C	1170 °F	AA; Typical

Processing Properties	Metric	English	Comments
Annealing Temperature	349 °C	660 °F

Component Elements Properties	Metric	English	Comments
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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