Aluminum 2018-T61

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Aluminum 2018-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 2018-T61; UNS A92018; AA2018-T61; Al2018-T61
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Physical Properties	Metric	English	Comments

Density	2.82 g/cc	0.102 lb/in³	AA; Typical

Mechanical Properties	Metric	English	Comments
Hardness, Brinell	120	120	AA; Typical; 500 g load; 10 mm ball
Hardness, Knoop	150	150	Converted from Brinell Hardness Value
Hardness, Rockwell A	47	47	Converted from Brinell Hardness Value
Hardness, Rockwell B	75	75	Converted from Brinell Hardness Value
Hardness, Vickers	137	137	Converted from Brinell Hardness Value
Tensile Strength, Ultimate	421 MPa	61000 psi	AA; Typical
Tensile Strength, Yield	317 MPa	46000 psi	AA; Typical
Elongation at Break	12 % @Diameter 12.7 mm	12 % @Diameter 0.500 in	AA; Typical
Modulus of Elasticity	74.5 GPa	10800 ksi	AA; Typical; Average of tension and compression. Compression modulus is about 2% greater than tensile modulus.
Poissons Ratio	0.33	0.33	Estimated from trends in similar Al alloys.
Fatigue Strength	117 MPa @# of Cycles 5.00e+8	17000 psi @# of Cycles 5.00e+8	completely reversed stress; RR Moore machine/specimen
Shear Modulus	28.0 GPa	4060 ksi	Estimated from similar Al alloys.
Shear Strength	269 MPa	39000 psi	AA; Typical

Electrical Properties	Metric	English	Comments
Electrical Resistivity	0.00000432 ohm-cm @Temperature 20.0 °C	0.00000432 ohm-cm @Temperature 68.0 °F	AA; Typical

Thermal Properties	Metric	English	Comments
CTE, linear	22.3 µm/m-°C @Temperature 20.0 - 100 °C	12.4 µin/in-°F @Temperature 68.0 - 212 °F	AA; Typical; average over range
	24.1 µm/m-°C @Temperature 20.0 - 300 °C	13.4 µin/in-°F @Temperature 68.0 - 572 °F
Specific Heat Capacity	0.880 J/g-°C	0.210 BTU/lb-°F	Estimated from other heat treatments.
Thermal Conductivity	154 W/m-K	1070 BTU-in/hr-ft²-°F	AA; Typical at 77°F
Melting Point	507 - 638 °C	945 - 1180 °F	AA; Typical range based on typical composition for wrought products >= 1/4 in. thickness. Eutectic melting can be eliminated by homogenization.
Solidus	507 °C	945 °F	AA; Typical
Liquidus	638 °C	1180 °F	AA; Typical

Component Elements Properties	Metric	English	Comments
Aluminum, Al	89.7 - 94.4 %	89.7 - 94.4 %	As remainder
Chromium, Cr	<= 0.10 %	<= 0.10 %
Copper, Cu	3.5 - 4.5 %	3.5 - 4.5 %
Iron, Fe	<= 1.0 %	<= 1.0 %
Magnesium, Mg	0.45 - 0.90 %	0.45 - 0.90 %
Manganese, Mn	<= 0.20 %	<= 0.20 %
Nickel, Ni	1.7 - 2.3 %	1.7 - 2.3 %
Other, each	<= 0.05 %	<= 0.05 %
Other, total	<= 0.15 %	<= 0.15 %
Silicon, Si	<= 0.90 %	<= 0.90 %
Zinc, Zn	<= 0.25 %	<= 0.25 %

References for this datasheet.

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MA2018T61 / 8854

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