5657 Aluminum Alloy Coil

 

5657 aluminum alloy is a non-heat treatable alloy that offers users workability and medium strength. Due to the addition of magnesium to the alloy, 5657 aluminum alloy has enhanced corrosion resistance. Aluminum 5657 can be welded with most convention methods including resistance welding, arc, and gas torch. This alloy can be both hot and cold formed as well as brazed, however it only offers fair machinability and getting the perfect finish takes extra work.

 

5657 aluminum alloy is made from high-purity aluminum (>99.85% Al) with a small amount of magnesium addition to increase its strength. It is intended for applications that require a bright finish attained by chemical or electrochemical brightening. This brightening characteristics are poor when the alloy is in the fully soft, annealed temper so it is not usually supplied in that temper.

 

Chemical Composition:

 

Chemical ElementsMetricEnglish
Aluminum, Al <= 98.5 %<= 98.5 %
Copper, Cu <= 0.10 %<= 0.10 %
Gallium, Ga <= 0.03 %<= 0.03 %
Iron, Fe <= 0.10 %<= 0.10 %
Magnesium, Mg 0.60 - 1.0 %0.60 - 1.0 %
Manganese, Mn <= 0.03 %<= 0.03 %
Other, each <= 0.02 %<= 0.02 %
Other, total <= 0.05 %<= 0.05 %
Silicon, Si <= 0.08 %<= 0.08 %
Vanadium, V <= 0.05 %<= 0.05 %

 

Mechanical Properties:

 

TemperSpecified Thickness(in)Tensile Strength - KSIElongationin 2 inches %
UltimateYield
MinMaxMinMax
H2410.030 - 0.0901826--13
H250.030 - 0.0902028--8
H260.030 - 0.0902230--7
H280.030 - 0.09025---5

 

Thermal Properties:


Thermal PropertiesMetricEnglishComments
CTE, linear21.9 µm/m-°C
@Temperature -50.0 - 20.0 °C
12.2 µin/in-°F
@Temperature -58.0 - 68.0 °F
 
 23.7 µm/m-°C
@Temperature 20.0 - 100 °C
13.2 µin/in-°F
@Temperature 68.0 - 212 °F
 
 23.8 µm/m-°C
@Temperature 20.0 - 100 °C
13.2 µin/in-°F
@Temperature 68.0 - 212 °F
AA; Typical; average over range
 24.6 µm/m-°C
@Temperature 20.0 - 200 °C
13.7 µin/in-°F
@Temperature 68.0 - 392 °F
 
 25.4 µm/m-°C
@Temperature 20.0 - 300 °C
14.1 µin/in-°F
@Temperature 68.0 - 572 °F
 
 25.6 µm/m-°C
@Temperature 20.0 - 300 °C
14.2 µin/in-°F
@Temperature 68.0 - 572 °F
 
Specific Heat Capacity 0.880 J/g-°C0.210 BTU/lb-°FEstimated from trends in similar Al alloys.
Thermal Conductivity 205 W/m-K1420 BTU-in/hr-ft²-°FAA; Typical at 77°F
Melting Point 638 - 657.2 °C1180 - 1215 °FAA; Typical range based on typical composition for wrought products >= 1/4 in. thickness
Solidus 638 °C1180 °FAA; Typical
Liquidus 657.2 °C1215 °FAA; Typical


Machinability:

This alloy is not noted for ease of machinability. It is relatively difficult to machine for an aluminum alloy and is considered only "fair" in terms of overall machinability. It tends to be "gummy" and thus needs care to produce a good machined finish. Except for very light cutting an oil base lubricant should be used during machining.

 

Forming:

Forming by conventional means of this alloy may be readily accomplished. The alloy may be cold worked or hot worked with ease. However in the harder (cold worked) tempers forming becomes more difficult.

 

Welding:

5657 aluminum alloy may be welded by conventional methods. Arc, gas torch, and resistance welding are the most commonly used processes. Filler metal, when required, should be AL 5457 or AL 5056 or 5052. The alloy may also be joined by brazing, although this requires special techniques and actual trial evaluation.

 

Heat Treatment:

5657 aluminum alloy is a non-heat treatable alloy. See "Annealing".

 

Forging:

The alloy is hot forgeable. However there is no data as to the hot working range - consult the alloy supplier.

 

Hot Working:

Hot working of 5657 aluminum alloy may be easily accomplished, if necessary, in the range of 700 to 450 F.

 

Cold Working:

Cold working of 5657 aluminum alloy is easily accomplished by standard commercial means in the soft tempers. The alloy may also be successfully cold worked in the harder tempers, but with more difficulty.

 

Annealing:

Annealing, to obtain O temper, of cold worked material is done at 775 F and air cooled. A stress-relief anneal may be done at 460 F for 3 hours followed by air cooling.

 

Aging:

Not applicable to this alloy.

 

Tempering:

Not applicable.

 

Hardening:

Hardens only due to cold working.

 

Conductivity:

Electrical conductivity 54% of copper.

 

Applications:

Commonly used in the manufacture of anodized auto and appliance trim.

 

 

 

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