Aluminum 2618-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: UNS A92618; Aluminium 2618-T61; AA2618-T61; Al2618-T61
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Physical PropertiesMetricEnglishComments
Density 2.76 g/cc0.0997 lb/in³AA; Typical
 
Mechanical PropertiesMetricEnglishComments
Hardness, Brinell 115115AA; Typical; 500 g load; 10 mm ball
Hardness, Knoop 144144Converted from Brinell Hardness Value
Hardness, Rockwell A 45.545.5Converted from Brinell Hardness Value
Hardness, Rockwell B 7272Converted from Brinell Hardness Value
Hardness, Vickers 130130Converted from Brinell Hardness Value
Tensile Strength, Ultimate 441 MPa64000 psiAA; Typical
 34.0 MPa
@Temperature 371 °C
4930 psi
@Temperature 700 °F
 52.0 MPa
@Temperature 316 °C
7540 psi
@Temperature 601 °F
 90.0 MPa
@Temperature 260 °C
13100 psi
@Temperature 500 °F
 221 MPa
@Temperature 204 °C
32100 psi
@Temperature 399 °F
 345 MPa
@Temperature 149 °C
50000 psi
@Temperature 300 °F
 427 MPa
@Temperature 100 °C
61900 psi
@Temperature 212 °F
 441 MPa
@Temperature -28.0 °C
64000 psi
@Temperature -18.4 °F
 441 MPa
@Temperature 24.0 °C
64000 psi
@Temperature 75.2 °F
 462 MPa
@Temperature -80.0 °C
67000 psi
@Temperature -112 °F
 538 MPa
@Temperature -196 °C
78000 psi
@Temperature -321 °F
 350 MPa
@Thickness 76.23 - 102 mm
50800 psi
@Thickness 3.001 - 4.00 in
Hand forgings; Short transverse
 360 MPa
@Thickness <=50.8 mm
52200 psi
@Thickness <=2.00 in
Hand forgings; Short transverse
 360 MPa
@Thickness 50.83 - 76.2 mm
52200 psi
@Thickness 2.001 - 3.00 in
Hand forgings; Short transverse
 365 MPa
@Thickness 76.23 - 102 mm
52900 psi
@Thickness 3.001 - 4.00 in
Hand forgings; Long transverse
 380 MPa
@Thickness <=102 mm
55100 psi
@Thickness <=4.00 in
Die forgings; Axis not parallel to grain flow
 380 MPa
@Thickness <=50.8 mm
55100 psi
@Thickness <=2.00 in
Hand forgings; Long transverse
 380 MPa
@Thickness 50.83 - 76.2 mm
55100 psi
@Thickness 2.001 - 3.00 in
Hand forgings; Long transverse
 380 MPa
@Thickness <=63.5 mm
55100 psi
@Thickness <=2.50 in
Rolled rings; Tangential
 380 MPa
@Thickness <=63.5 mm
55100 psi
@Thickness <=2.50 in
Rolled rings; Axial
 385 MPa
@Thickness 76.23 - 102 mm
55800 psi
@Thickness 3.001 - 4.00 in
Hand forgings; Longitudinal
 395 MPa
@Thickness 50.83 - 76.2 mm
57300 psi
@Thickness 2.001 - 3.00 in
Hand forgings; Longitudinal
 400 MPa
@Thickness <=102 mm
58000 psi
@Thickness <=4.00 in
Die forgings; Axis parallel to grain flow
 400 MPa
@Thickness <=50.8 mm
58000 psi
@Thickness <=2.00 in
Hand forgings; Longitudinal
Tensile Strength, Yield 372 MPa54000 psiAA; Typical
 270 MPa
@Thickness 76.23 - 102 mm
39200 psi
@Thickness 3.001 - 4.00 in
Hand forgings; Short transverse
 275 MPa
@Thickness 76.23 - 102 mm
39900 psi
@Thickness 3.001 - 4.00 in
Hand forgings; Long transverse
 285 MPa
@Thickness <=63.5 mm
41300 psi
@Thickness <=2.50 in
Rolled rings; Tangential
 285 MPa
@Thickness <=63.5 mm
41300 psi
@Thickness <=2.50 in
Rolled rings; Axial
 290 MPa
@Thickness <=102 mm
42100 psi
@Thickness <=4.00 in
Die forgings; Axis not parallel to grain flow
 290 MPa
@Thickness <=50.8 mm
42100 psi
@Thickness <=2.00 in
Hand forgings; Long transverse
 290 MPa
@Thickness <=50.8 mm
42100 psi
@Thickness <=2.00 in
Hand forgings; Short transverse
 290 MPa
@Thickness 50.83 - 76.2 mm
42100 psi
@Thickness 2.001 - 3.00 in
Hand forgings; Long transverse
 290 MPa
@Thickness 50.83 - 76.2 mm
42100 psi
@Thickness 2.001 - 3.00 in
Hand forgings; Short transverse
 310 MPa
@Thickness <=102 mm
45000 psi
@Thickness <=4.00 in
Die forgings; Axis parallel to grain flow
 310 MPa
@Thickness 76.23 - 102 mm
45000 psi
@Thickness 3.001 - 4.00 in
Hand forgings; Longitudinal
 315 MPa
@Thickness 50.83 - 76.2 mm
45700 psi
@Thickness 2.001 - 3.00 in
Hand forgings; Longitudinal
 325 MPa
@Thickness <=50.8 mm
47100 psi
@Thickness <=2.00 in
Hand forgings; Longitudinal
 24.0 MPa
@Strain 0.200 %,
Temperature 371 °C
3480 psi
@Strain 0.200 %,
Temperature 700 °F
 31.0 MPa
@Strain 0.200 %,
Temperature 316 °C
4500 psi
@Strain 0.200 %,
Temperature 601 °F
 62.0 MPa
@Strain 0.200 %,
Temperature 260 °C
8990 psi
@Strain 0.200 %,
Temperature 500 °F
 179 MPa
@Strain 0.200 %,
Temperature 204 °C
26000 psi
@Strain 0.200 %,
Temperature 399 °F
 303 MPa
@Strain 0.200 %,
Temperature 149 °C
43900 psi
@Strain 0.200 %,
Temperature 300 °F
 372 MPa
@Strain 0.200 %,
Temperature -28.0 °C
54000 psi
@Strain 0.200 %,
Temperature -18.4 °F
 372 MPa
@Strain 0.200 %,
Temperature 24.0 °C
54000 psi
@Strain 0.200 %,
Temperature 75.2 °F
 372 MPa
@Strain 0.200 %,
Temperature 100 °C
54000 psi
@Strain 0.200 %,
Temperature 212 °F
 379 MPa
@Strain 0.200 %,
Temperature -80.0 °C
55000 psi
@Strain 0.200 %,
Temperature -112 °F
 421 MPa
@Strain 0.200 %,
Temperature -196 °C
61100 psi
@Strain 0.200 %,
Temperature -321 °F
Elongation at Break  10 %
@Temperature -28.0 °C
10 %
@Temperature -18.4 °F
 10 %
@Temperature 24.0 °C
10 %
@Temperature 75.2 °F
 10 %
@Temperature 100 °C
10 %
@Temperature 212 °F
 11 %
@Temperature -80.0 °C
11 %
@Temperature -112 °F
 12 %
@Temperature -196 °C
12 %
@Temperature -321 °F
 14 %
@Temperature 149 °C
14 %
@Temperature 300 °F
 24 %
@Temperature 204 °C
24 %
@Temperature 399 °F
 50 %
@Temperature 260 °C
50 %
@Temperature 500 °F
 80 %
@Temperature 316 °C
80 %
@Temperature 601 °F
 120 %
@Temperature 371 °C
120 %
@Temperature 700 °F
 4.0 %
@Thickness <=102 mm
4.0 %
@Thickness <=4.00 in
Die forgings; Axis parallel to grain flow
 4.0 %
@Thickness <=102 mm
4.0 %
@Thickness <=4.00 in
Die forgings; Axis not parallel to grain flow
 4.0 %
@Thickness <=50.8 mm
4.0 %
@Thickness <=2.00 in
Hand forgings; Short transverse
 4.0 %
@Thickness 50.83 - 76.2 mm
4.0 %
@Thickness 2.001 - 3.00 in
Hand forgings; Short transverse
 4.0 %
@Thickness 76.23 - 102 mm
4.0 %
@Thickness 3.001 - 4.00 in
Hand forgings; Short transverse
 5.0 %
@Thickness <=50.8 mm
5.0 %
@Thickness <=2.00 in
Hand forgings; Long transverse
 5.0 %
@Thickness 50.83 - 76.2 mm
5.0 %
@Thickness 2.001 - 3.00 in
Hand forgings; Long transverse
 5.0 %
@Thickness 76.23 - 102 mm
5.0 %
@Thickness 3.001 - 4.00 in
Hand forgings; Long transverse
 5.0 %
@Thickness <=63.5 mm
5.0 %
@Thickness <=2.50 in
Rolled rings; Axial
 6.0 %
@Thickness <=63.5 mm
6.0 %
@Thickness <=2.50 in
Rolled rings; Tangential
 7.0 %
@Thickness <=50.8 mm
7.0 %
@Thickness <=2.00 in
Hand forgings; Longitudinal
 7.0 %
@Thickness 50.83 - 76.2 mm
7.0 %
@Thickness 2.001 - 3.00 in
Hand forgings; Longitudinal
 7.0 %
@Thickness 76.23 - 102 mm
7.0 %
@Thickness 3.001 - 4.00 in
Hand forgings; Longitudinal
 10 %
@Diameter 12.7 mm
10 %
@Diameter 0.500 in
AA; Typical
Modulus of Elasticity 74.5 GPa10800 ksiAA; Typical; Average of tension and compression. Compression modulus is about 2% greater than tensile modulus.
Compressive Strength 370 MPa53700 psi
Poissons Ratio 0.330.33
Fatigue Strength 124 MPa
@# of Cycles 5.00e+8
18000 psi
@# of Cycles 5.00e+8
completely reversed stress; RR Moore machine/specimen
Shear Modulus 27.0 GPa3920 ksiCalculated
Shear Strength 262 MPa38000 psiAA; Typical
 
Electrical PropertiesMetricEnglishComments
Electrical Resistivity 0.00000470 ohm-cm0.00000470 ohm-cm
 
Thermal PropertiesMetricEnglishComments
CTE, linear  20.6 µm/m-°C
@Temperature -50.0 - 20.0 °C
11.4 µin/in-°F
@Temperature -58.0 - 68.0 °F
 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
 23.2 µm/m-°C
@Temperature 20.0 - 200 °C
12.9 µin/in-°F
@Temperature 68.0 - 392 °F
 24.0 µm/m-°C
@Temperature 20.0 - 300 °C
13.3 µin/in-°F
@Temperature 68.0 - 572 °F
average
 24.1 µm/m-°C
@Temperature 20.0 - 300 °C
13.4 µin/in-°F
@Temperature 68.0 - 572 °F
Specific Heat Capacity 0.875 J/g-°C0.209 BTU/lb-°F
Thermal Conductivity 146 W/m-K1010 BTU-in/hr-ft²-°F
Melting Point 549 - 638 °C1020 - 1180 °FAA; Typical range based on typical composition for wrought products 1/4 inch thickness or greater
Solidus 549 °C1020 °FAA; Typical
Liquidus 638 °C1180 °FAA; Typical
 
Processing PropertiesMetricEnglishComments
Solution Temperature 529 °C985 °F
Aging Temperature 199 °C390 °Ffor 20 hr at temperature
 
Component Elements PropertiesMetricEnglishComments
Aluminum, Al 92.4 - 94.9 %92.4 - 94.9 %As remainder
Copper, Cu 1.9 - 2.7 %1.9 - 2.7 %
Iron, Fe 0.90 - 1.3 %0.90 - 1.3 %
Magnesium, Mg 1.3 - 1.8 %1.3 - 1.8 %
Nickel, Ni 0.90 - 1.2 %0.90 - 1.2 %
Other, each <= 0.05 %<= 0.05 %
Other, total <= 0.15 %<= 0.15 %
Silicon, Si 0.10 - 0.25 %0.10 - 0.25 %
Titanium, Ti 0.04 - 0.10 %0.04 - 0.10 %
Zinc, Zn <= 0.10 %<= 0.10 %

References for this datasheet.

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