6070 Aluminum Alloy Bar

 

6070 aluminum is a 6000-series aluminum alloy: there is significant alloying with both magnesium and silicon, and the alloy is formulated for primary forming into wrought products. 6070 is the Aluminum Association (AA) designation for this material. In European standards, it will be given as EN AW-6070. A96070 is the UNS number.


 

Chemical Composition:

 

Chemical ElementsMetricEnglish
Aluminum, Al 93 - 97 %93 - 97 %
Chromium, Cr <= 0.40 %<= 0.40 %
Copper, Cu 0.70 - 1.2 %0.70 - 1.2 %
Iron, Fe <= 0.50 %<= 0.50 %
Magnesium, Mg 0.80 - 1.4 %0.80 - 1.4 %
Manganese, Mn 0.60 - 1.1 %0.60 - 1.1 %
Other, each <= 0.05 %<= 0.05 %
Other, total <= 0.15 %<= 0.15 %
Silicon, Si 0.90 - 1.8 %0.90 - 1.8 %
Titanium, Ti <= 0.20 %<= 0.20 %
Zinc, Zn <= 0.25 %<= 0.25 %

 

Mechanical properties:

 
 
Mechanical PropertiesMetricEnglishComments
Hardness, Brinell 120120AA; Typical; 500 g load; 10 mm ball
Hardness, Knoop 150150Converted from Brinell Hardness Value
Hardness, Rockwell A 4747Converted from Brinell Hardness Value
Hardness, Rockwell B 7575Converted from Brinell Hardness Value
Hardness, Vickers 137137Converted from Brinell Hardness Value
Tensile Strength, Ultimate 393 MPa57000 psiAA; Typical
Tensile Strength, Yield 359 MPa52000 psiAA; Typical
Elongation at Break 12 %
@Diameter 12.7 mm
12 %
@Diameter 0.500 in
AA; Typical
Modulus of Elasticity 68.9 GPa10000 ksiAA; Typical; Average of tension and compression. Compression modulus is about 2% greater than tensile modulus.
Poissons Ratio 0.330.33Estimated from trends in similar Al alloys.
Fatigue Strength 110 MPa
@# of Cycles 5.00e+8
16000 psi
@# of Cycles 5.00e+8
completely reversed stress; RR Moore machine/specimen
Machinability 70 %70 %0-100 Scale of Aluminum Alloys
Shear Modulus 26.0 GPa3770 ksiEstimated from similar Al alloys.
Shear Strength 234 MPa34000 psiAA; Typical

 

 

Thermal Properties:

 
Thermal PropertiesMetricEnglishComments
CTE, linear23.2 µm/m-°C
@Temperature 20.0 - 100 °C
12.9 µin/in-°F
@Temperature 68.0 - 212 °F
AA; Typical; average over range
 24.8 µm/m-°C
@Temperature 20.0 - 300 °C
13.8 µin/in-°F
@Temperature 68.0 - 572 °F
 
Specific Heat Capacity 0.887 J/g-°C0.212 BTU/lb-°F 
Thermal Conductivity 147 W/m-K1020 BTU-in/hr-ft²-°FAA; Typical at 77°F
Melting Point 562.8 - 646.1 °C1045 - 1195 °FAA; Typical range based on typical composition for wrought products >= 1/4 in. thickness. Eutectic melting is not eliminated by homogenization.
Solidus 562.8 °C1045 °FAA; Typical
Liquidus 646.1 °C1195 °FAA; Typical

 

Process Properties:

 

Processing PropertiesMetricEnglishComments
Annealing Temperature 414 °C778 °Fhold at temperature 2 to 3 hr
Solution Temperature 532 °C990 °Ffollowed by quenching
Aging Temperature 177 °C350 °Fhold at temperature 8 hr
 

 

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