Aluminum 2618-T61

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 Properties	Metric	English	Comments

Density	2.76 g/cc	0.0997 lb/in³	AA; Typical

Mechanical Properties	Metric	English	Comments
Hardness, Brinell	115	115	AA; Typical; 500 g load; 10 mm ball
Hardness, Knoop	144	144	Converted from Brinell Hardness Value
Hardness, Rockwell A	45.5	45.5	Converted from Brinell Hardness Value
Hardness, Rockwell B	72	72	Converted from Brinell Hardness Value
Hardness, Vickers	130	130	Converted from Brinell Hardness Value
Tensile Strength, Ultimate	441 MPa	64000 psi	AA; 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 MPa	54000 psi	AA; 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 0.2 %, Temperature 371 °C	3480 psi @Strain 0.2 %, Temperature 700 °F
	31.0 MPa @Strain 0.2 %, Temperature 316 °C	4500 psi @Strain 0.2 %, Temperature 601 °F
	62.0 MPa @Strain 0.2 %, Temperature 260 °C	8990 psi @Strain 0.2 %, Temperature 500 °F
	179 MPa @Strain 0.2 %, Temperature 204 °C	26000 psi @Strain 0.2 %, Temperature 399 °F
	303 MPa @Strain 0.2 %, Temperature 149 °C	43900 psi @Strain 0.2 %, Temperature 300 °F
	372 MPa @Strain 0.2 %, Temperature -28.0 °C	54000 psi @Strain 0.2 %, Temperature -18.4 °F
	372 MPa @Strain 0.2 %, Temperature 24.0 °C	54000 psi @Strain 0.2 %, Temperature 75.2 °F
	372 MPa @Strain 0.2 %, Temperature 100 °C	54000 psi @Strain 0.2 %, Temperature 212 °F
	379 MPa @Strain 0.2 %, Temperature -80.0 °C	55000 psi @Strain 0.2 %, Temperature -112 °F
	421 MPa @Strain 0.2 %, Temperature -196 °C	61100 psi @Strain 0.2 %, 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 GPa	10800 ksi	AA; Typical; Average of tension and compression. Compression modulus is about 2% greater than tensile modulus.
Compressive Strength	370 MPa	53700 psi
Poissons Ratio	0.33	0.33
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 GPa	3920 ksi	Calculated
Shear Strength	262 MPa	38000 psi	AA; Typical

Electrical Properties	Metric	English	Comments
Electrical Resistivity	0.00000470 ohm-cm	0.00000470 ohm-cm

Thermal Properties	Metric	English	Comments
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-°C	0.209 BTU/lb-°F
Thermal Conductivity	146 W/m-K	1010 BTU-in/hr-ft²-°F
Melting Point	549 - 638 °C	1020 - 1180 °F	AA; Typical range based on typical composition for wrought products >= 1/4 in. thickness
Solidus	549 °C	1020 °F	AA; Typical
Liquidus	638 °C	1180 °F	AA; Typical

Processing Properties	Metric	English	Comments
Solution Temperature	529 °C	985 °F
Aging Temperature	199 °C	390 °F	for 20 hr at temperature

Component Elements Properties	Metric	English	Comments
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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