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Elmet Technologies

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Aluminum 2218-T72
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-T72; UNS A92218; AMS 4142; NF A-U4N (France); QQ-A-367; SAE J454; AA2218-T72; Al2218-T72
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Physical PropertiesOriginal ValueComments
Density 2.81 g/ccAA; Typical
 
Mechanical PropertiesOriginal ValueComments
Hardness, Brinell 95AA; Typical; 500 g load; 10 mm ball
Hardness, Knoop 120Converted from Brinell Hardness Value
Hardness, Rockwell A 39.5Converted from Brinell Hardness Value
Hardness, Rockwell B 60Converted from Brinell Hardness Value
Hardness, Vickers 107Converted from Brinell Hardness Value
Tensile Strength, Ultimate 48.0 ksiAA; Typical
Tensile Strength, Yield 37.0 ksiAA; Typical
Elongation at Break 11 %
@Diameter 12.7 mm
AA; Typical
Modulus of Elasticity 10800 ksiAA; Typical; Average of tension and compression. Compression modulus is about 2% greater than tensile modulus.
Poissons Ratio 0.33
Shear Modulus 27.5 GPa
Shear Strength 30.0 ksiAA; Typical
 
Electrical PropertiesOriginal ValueComments
Electrical Resistivity 26.0 ohm-cir-mil/ft
@Temperature 20.0 °C
AA; Typical
 
Thermal PropertiesOriginal ValueComments
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-°CEstimated from trends in similar Al alloys.
Thermal Conductivity 1070 BTU-in/hr-ft²-°FAA; Typical at 77°F
Melting Point 940 - 1175 °FAA; Typical range based on typical composition for wrought products >= 1/4 in. thickness. Eutectic melting is not eliminated by homogenization.
Solidus 940 °FAA; Typical
Liquidus 1175 °FAA; Typical
 
Processing PropertiesOriginal ValueComments
Solution Temperature 950 °F
Aging Temperature 460 °Ffor 6 hr at temperature
 
Component Elements PropertiesOriginal ValueComments
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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MA2218T72 / 8925

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