Aluminum 2218-T61

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Aluminum 2218-T61
Categories:	Metal; Nonferrous Metal; Aluminum Alloy; 2000 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:	Aluminium 2218-T61; UNS A92218; AMS 4142; NF A-U4N (France); QQ-A-367; SAE J454; AA2218-T61; Al2218-T61
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Physical Properties	Original Value	Comments

Density	2.81 g/cc	AA; Typical

Mechanical Properties	Original Value	Comments
Hardness, Brinell	115	500 kg load with 10 mm ball
Hardness, Knoop	140	Converted from Brinell Hardness Value
Hardness, Rockwell A	45.5	Converted from Brinell Hardness Value
Hardness, Rockwell B	71	Converted from Brinell Hardness Value
Hardness, Vickers	126	Converted from Brinell Hardness Value
Tensile Strength, Ultimate	405 MPa
	30.0 MPa @Temperature 371 °C
	40.0 MPa @Temperature 315 °C
	70.0 MPa @Temperature 260 °C
	150 MPa @Temperature 205 °C
	285 MPa @Temperature 150 °C
	385 MPa @Temperature 100 °C
	405 MPa @Temperature -30.0 °C
	405 MPa @Temperature 25.0 °C
	420 MPa @Temperature -80.0 °C
	495 MPa @Temperature -195 °C
Tensile Strength, Yield	305 MPa
	17.0 MPa @Temperature 371 °C
	20.0 MPa @Temperature 315 °C
	40.0 MPa @Temperature 260 °C
	110 MPa @Temperature 205 °C
	240 MPa @Temperature 150 °C
	290 MPa @Temperature 100 °C
	305 MPa @Temperature -30.0 °C
	305 MPa @Temperature 25.0 °C
	310 MPa @Temperature -80.0 °C
	360 MPa @Temperature -195 °C
Elongation at Break	13 % @Temperature -30.0 °C
	13 % @Temperature 25.0 °C
	14 % @Temperature -80.0 °C
	15 % @Temperature -195 °C
	15 % @Temperature 100 °C
	17 % @Temperature 150 °C
	30 % @Temperature 205 °C
	70 % @Temperature 260 °C
	85 % @Temperature 315 °C
	100 % @Temperature 371 °C
	13 % @Thickness 1.60 mm	In 5 cm
Modulus of Elasticity	74.4 GPa	Average of Tension and Compression. In Al alloys, the compressive modulus is typically 2% greater than the tensile modulus
Poissons Ratio	0.33
Shear Modulus	27.5 GPa
Shear Strength	240 MPa	Calculated value.

Electrical Properties	Original Value	Comments
Electrical Resistivity	0.00000450 ohm-cm

Thermal Properties	Original Value	Comments
CTE, linear	12.4 µin/in-°F @Temperature 20.0 - 100 °C	AA; Typical; average over range
	20.7 µm/m-°C @Temperature -50.0 - 20.0 °C
	22.4 µm/m-°C @Temperature 20.0 - 100 °C
	23.3 µm/m-°C @Temperature 20.0 - 200 °C
	24.2 µm/m-°C @Temperature 20.0 - 300 °C
Specific Heat Capacity	0.880 J/g-°C	Estimated from trends in similar Al alloys.
Thermal Conductivity	148 W/m-K
Melting Point	935 - 1180 °F	AA; Typical range based on typical composition for wrought products >= 1/4 in. thickness. Eutectic melting is not eliminated by homogenization.
Solidus	935 °F	AA; Typical
Liquidus	1180 °F	AA; Typical

Processing Properties	Original Value	Comments
Solution Temperature	950 °F
Aging Temperature	340 °F	for 10 hr at temperature

Component Elements Properties	Original Value	Comments
Aluminum, Al	88.8 - 93.6 %	As remainder
Chromium, Cr	<= 0.10 %
Copper, Cu	3.5 - 4.5 %
Iron, Fe	<= 1.0 %
Magnesium, Mg	1.2 - 1.8 %
Manganese, Mn	<= 0.20 %
Nickel, Ni	1.7 - 2.3 %
Other, each	<= 0.05 %
Other, total	<= 0.15 %
Silicon, Si	<= 0.90 %
Zinc, Zn	<= 0.25 %

References for this datasheet.

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MA2218T61 / 8923

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