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Elmet Technologies

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Aluminum 7178-T6; 7178-T651 (Included Creep/Rupture Data)
Categories: Metal; Nonferrous Metal; Aluminum Alloy; 7000 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:
This designation is considered the sole original alloy for this alloy family.
Composition information provided by the Aluminum Association and is not for design.
Key Words: UNS A97178; Aluminium 7178-T6; Aluminium 7178-T651; AA7178-T651; AA7178-T6
Vendors: No vendors are listed for this material. Please click here if you are a supplier and would like information on how to add your listing to this material.
 
Physical PropertiesOriginal ValueComments
Density 2.83 g/ccAA; Typical
 
Mechanical PropertiesOriginal ValueComments
Hardness, Brinell 160500 kg load with 10 mm ball
Hardness, Knoop 205Converted from Brinell Hardness Value
Hardness, Rockwell A 55.3Converted from Brinell Hardness Value
Hardness, Rockwell B 90Converted from Brinell Hardness Value
Hardness, Vickers 189Converted from Brinell Hardness Value
Tensile Strength, Ultimate 88.0 ksiAA; Typical
 45.0 MPa
@Temperature 371 °C
 59.0 MPa
@Temperature 316 °C
 76.0 MPa
@Temperature 260 °C
 105 MPa
@Temperature 204 °C
 215 MPa
@Temperature 149 °C
 505 MPa
@Temperature 100 °C
 605 MPa
@Temperature 24.0 °C
 625 MPa
@Temperature -28.0 °C
 650 MPa
@Temperature -80.0 °C
 730 MPa
@Temperature -196 °C
Tensile Strength, Yield 78.0 ksiAA; Typical
 38.0 MPa
@Strain 0.2 %,
Temperature 271 °C
 48.0 MPa
@Strain 0.2 %,
Temperature 316 °C
 62.0 MPa
@Strain 0.2 %,
Temperature 260 °C
 83.0 MPa
@Strain 0.2 %,
Temperature 204 °C
 185 MPa
@Strain 0.2 %,
Temperature 149 °C
 470 MPa
@Strain 0.2 %,
Temperature 100 °C
 540 MPa
@Strain 0.2 %,
Temperature 24.0 °C
 560 MPa
@Strain 0.2 %,
Temperature -28.0 °C
 580 MPa
@Strain 0.2 %,
Temperature -80.0 °C
 650 MPa
@Strain 0.2 %,
Temperature -196 °C
Elongation at Break 5.0 %
@Temperature -196 °C
 8.0 %
@Temperature -80.0 °C
 9.0 %
@Temperature -28.0 °C
 11 %
@Temperature 24.0 °C
 14 %
@Temperature 100 °C
 40 %
@Temperature 149 °C
 70 %
@Temperature 204 °C
 76 %
@Temperature 260 °C
 80 %
@Temperature 316 °C
 80 %
@Temperature 371 °C
 10 %
@Thickness 1.59 mm		AA; Typical
 11 %
@Diameter 12.7 mm		AA; Typical
Creep Strength 23.0 MPa
@Temperature 315 °C,
Time 3.60e+6 sec		1% creep
 26.0 MPa
@Temperature 315 °C,
Time 360000 sec		0.5% creep
 26.0 MPa
@Temperature 315 °C,
Time 36000 sec		0.2% creep
 26.0 MPa
@Temperature 315 °C,
Time 3600 sec		0.1% creep
 29.0 MPa
@Temperature 260 °C,
Time 3.60e+6 sec		0.5% creep
 30.0 MPa
@Temperature 315 °C,
Time 360000 sec		1% creep
 34.0 MPa
@Temperature 260 °C,
Time 3.60e+6 sec		1% creep
 34.0 MPa
@Temperature 315 °C,
Time 36000 sec		0.5% creep
 34.0 MPa
@Temperature 260 °C,
Time 360000 sec		0.2% creep
 34.0 MPa
@Temperature 315 °C,
Time 3600 sec		0.2% creep
 38.0 MPa
@Temperature 315 °C,
Time 36000 sec		1% creep
 38.0 MPa
@Temperature 315 °C,
Time 360 sec		0.1% creep
 41.0 MPa
@Temperature 315 °C,
Time 3600 sec		0.5% creep
 41.0 MPa
@Temperature 260 °C,
Time 36000 sec		0.1% creep
 45.0 MPa
@Temperature 315 °C,
Time 3600 sec		1% creep
 45.0 MPa
@Temperature 260 °C,
Time 360000 sec		0.5% creep
 45.0 MPa
@Temperature 315 °C,
Time 360 sec		0.2% creep
 48.0 MPa
@Temperature 315 °C,
Time 360 sec		0.5% creep
 52.0 MPa
@Temperature 260 °C,
Time 360000 sec		1% creep
 52.0 MPa
@Temperature 315 °C,
Time 360 sec		1% creep
 55.0 MPa
@Temperature 260 °C,
Time 36000 sec		0.2% creep
 55.0 MPa
@Temperature 205 °C,
Time 3.60e+6 sec		0.1% creep
 59.0 MPa
@Temperature 205 °C,
Time 3.60e+6 sec		0.2% creep
 66.0 MPa
@Temperature 260 °C,
Time 36000 sec		0.5% creep
 66.0 MPa
@Temperature 260 °C,
Time 3600 sec		0.1% creep
 69.0 MPa
@Temperature 205 °C,
Time 3.60e+6 sec		1% creep
 69.0 MPa
@Temperature 260 °C,
Time 36000 sec		1% creep
 69.0 MPa
@Temperature 205 °C,
Time 3.60e+6 sec		0.5% creep
 76.0 MPa
@Temperature 205 °C,
Time 360000 sec		0.1% creep
 83.0 MPa
@Temperature 205 °C,
Time 360000 sec		0.2% creep
 83.0 MPa
@Temperature 260 °C,
Time 3600 sec		0.2% creep
 90.0 MPa
@Temperature 260 °C,
Time 3600 sec		0.5% creep
 97.0 MPa
@Temperature 205 °C,
Time 360000 sec		1% creep
 97.0 MPa
@Temperature 260 °C,
Time 3600 sec		1% creep
 97.0 MPa
@Temperature 205 °C,
Time 360000 sec		0.5% creep
 97.0 MPa
@Temperature 205 °C,
Time 36000 sec		0.1% creep
 97.0 MPa
@Temperature 260 °C,
Time 360 sec		0.1% creep
 105 MPa
@Temperature 260 °C,
Time 360 sec		0.2% creep
 110 MPa
@Temperature 260 °C,
Time 360 sec		1% creep
 110 MPa
@Temperature 260 °C,
Time 360 sec		0.5% creep
 130 MPa
@Temperature 205 °C,
Time 36000 sec		0.2% creep
 130 MPa
@Temperature 150 °C,
Time 3.60e+6 sec		0.1% creep
 145 MPa
@Temperature 205 °C,
Time 36000 sec		1% creep
 145 MPa
@Temperature 205 °C,
Time 36000 sec		0.5% creep
 145 MPa
@Temperature 205 °C,
Time 3600 sec		0.1% creep
 150 MPa
@Temperature 150 °C,
Time 3.60e+6 sec		0.2% creep
 170 MPa
@Temperature 150 °C,
Time 3.60e+6 sec		0.5% creep
 180 MPa
@Temperature 150 °C,
Time 3.60e+6 sec		1% creep
 180 MPa
@Temperature 205 °C,
Time 3600 sec		0.2% creep
 185 MPa
@Temperature 150 °C,
Time 360000 sec		0.1% creep
 200 MPa
@Temperature 205 °C,
Time 3600 sec		0.5% creep
 205 MPa
@Temperature 205 °C,
Time 3600 sec		1% creep
 205 MPa
@Temperature 205 °C,
Time 360 sec		0.1% creep
 235 MPa
@Temperature 150 °C,
Time 360000 sec		0.2% creep
 235 MPa
@Temperature 205 °C,
Time 360 sec		0.2% creep
 250 MPa
@Temperature 150 °C,
Time 36000 sec		0.1% creep
 255 MPa
@Temperature 150 °C,
Time 360000 sec		0.5% creep
 255 MPa
@Temperature 205 °C,
Time 360 sec		0.5% creep
 260 MPa
@Temperature 205 °C,
Time 360 sec		1% creep
 270 MPa
@Temperature 150 °C,
Time 360000 sec		1% creep
 310 MPa
@Temperature 150 °C,
Time 36000 sec		0.2% creep
 315 MPa
@Temperature 150 °C,
Time 3600 sec		0.1% creep
 340 MPa
@Temperature 150 °C,
Time 36000 sec		0.5% creep
 345 MPa
@Temperature 150 °C,
Time 36000 sec		1% creep
 360 MPa
@Temperature 150 °C,
Time 3600 sec		0.2% creep
 365 MPa
@Temperature 150 °C,
Time 360 sec		0.1% creep
 380 MPa
@Temperature 150 °C,
Time 3600 sec		0.5% creep
 395 MPa
@Temperature 150 °C,
Time 3600 sec		1% creep
 395 MPa
@Temperature 150 °C,
Time 360 sec		0.2% creep
 415 MPa
@Temperature 150 °C,
Time 360 sec		0.5% creep
 420 MPa
@Temperature 150 °C,
Time 360 sec		1% creep
Rupture Strength 28.0 MPa
@Temperature 315 °C,
Time 3.60e+6 sec
 34.0 MPa
@Temperature 315 °C,
Time 360000 sec
 41.0 MPa
@Temperature 260 °C,
Time 3.60e+6 sec
 41.0 MPa
@Temperature 315 °C,
Time 36000 sec
 52.0 MPa
@Temperature 315 °C,
Time 3600 sec
 55.0 MPa
@Temperature 260 °C,
Time 360000 sec
 62.0 MPa
@Temperature 315 °C,
Time 360 sec
 69.0 MPa
@Temperature 205 °C,
Time 3.60e+6 sec
 69.0 MPa
@Temperature 260 °C,
Time 36000 sec
 97.0 MPa
@Temperature 260 °C,
Time 3600 sec
 105 MPa
@Temperature 205 °C,
Time 360000 sec
 110 MPa
@Temperature 260 °C,
Time 360 sec
 150 MPa
@Temperature 205 °C,
Time 36000 sec
 180 MPa
@Temperature 150 °C,
Time 3.60e+6 sec
 215 MPa
@Temperature 205 °C,
Time 3600 sec
 275 MPa
@Temperature 205 °C,
Time 360 sec
 285 MPa
@Temperature 150 °C,
Time 360000 sec
 370 MPa
@Temperature 150 °C,
Time 36000 sec
 415 MPa
@Temperature 150 °C,
Time 3600 sec
 440 MPa
@Temperature 150 °C,
Time 360 sec
Modulus of Elasticity 10400 ksiAA; Typical; Average of tension and compression. Compression modulus is about 2% greater than tensile modulus.
Compressive Yield Strength 530 MPa0.1% Permanent Set
Notched Tensile Strength 386 MPa2.5 cm width x 0.16 cm thick side-notched specimen, Kt = 17.
Ultimate Bearing Strength 1089 MPaEdge distance/pin diameter = 2.0
Bearing Yield Strength 807 MPaEdge distance/pin diameter = 2.0
Poissons Ratio 0.33Estimated from trends in similar Al alloys.
Fatigue Strength 150 MPa
@# of Cycles 5.00e+8
Machinability 70 %0-100 Scale of Aluminum Alloys
Shear Modulus 27.0 GPaEstimated from similar Al alloys.
Shear Strength 360 MPa
 
Electrical PropertiesOriginal ValueComments
Electrical Resistivity 33.0 ohm-cir-mil/ft
@Temperature 20.0 °C		AA; Typical
 
Thermal PropertiesOriginal ValueComments
CTE, linear 13.0 µin/in-°F
@Temperature 20.0 - 100 °C		AA; Typical; average over range
 21.7 µm/m-°C
@Temperature -50.0 - 20.0 °C
 23.5 µm/m-°C
@Temperature 20.0 - 100 °C
 24.4 µm/m-°C
@Temperature 20.0 - 200 °C
 25.4 µm/m-°C
@Temperature 20.0 - 300 °C
Specific Heat Capacity 0.856 J/g-°C
Thermal Conductivity 870 BTU-in/hr-ft²-°FAA; Typical at 77°F
Melting Point 890 - 1165 °FAA; Typical range based on typical composition for wrought products >= 1/4 in. thickness. Homogenization may raise eutectic melting temperature 20-40°F but usually does not eliminate it.
Solidus 890 °FAA; Typical
Liquidus 1165 °FAA; Typical
 
Processing PropertiesOriginal ValueComments
Annealing Temperature 775 °F
Solution Temperature 875 °F
Aging Temperature 250 °Ffor 24 hr
 
Component Elements PropertiesOriginal ValueComments
Aluminum, Al 85.3 - 89.5 %As remainder
Chromium, Cr 0.18 - 0.28 %
Copper, Cu 1.6 - 2.4 %
Iron, Fe <= 0.50 %
Magnesium, Mg 2.4 - 3.1 %
Manganese, Mn <= 0.30 %
Other, each <= 0.05 %
Other, total <= 0.15 %
Silicon, Si <= 0.40 %
Titanium, Ti <= 0.20 %
Zinc, Zn 6.3 - 7.3 %

References for this datasheet.

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MA7178T6a / 170636

Ensinger PEI




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