What Shanghai Miandi Offer?
We are a professional supplier of Aluminum Alloy Products, from
1000 Series to 7000 Series we can offer.
So how Aluminum can do for you?
What is an Aluminum Alloy?
An aluminum alloy is a chemical composition where other elements
are added to pure aluminum in order to enhance its properties,
primarily to increase its strength. These other elements include
iron, silicon, copper, magnesium, manganese and zinc at levels that
combined may make up as much as 15 percent of the alloy by weight.
Alloys are assigned a four-digit number, in which the first digit
identifies a general class, or series, characterized by its main
alloying elements.
Commercially Pure Aluminum
1xxx Series
The 1xxx series alloys are comprised of aluminum 99 percent or
higher purity. This series has excellent corrosion resistance,
excellent workability, as well as high thermal and electrical
conductivity. This is why the 1xxx series is commonly used for
transmission, or power grid, lines. Common alloy designations in
this series are 1350, for electrical applications, and 1100, for
food packaging trays.
Heat-Treatable Alloys
Some alloys are strengthened by solution heat-treating and then
quenching, or rapid cooling. Heat treating takes the solid, alloyed
metal and heats it to a specific point. The alloy elements, called
solute, are homogeneously distributed with the aluminum putting
them in a solid solution. The metal is subsequently quenched, or
rapidly cooled, which freezes the solute atoms in place. The solute
atoms consequently combine into a finely distributed precipitate.
This occurs at room temperature which is called natural aging or in
a low temperature furnace operation which is called artificial
aging.
2xxx Series
In the 2xxx series, copper is used as the principle alloying
element and can be strengthened significantly through solution
heat-treating. These alloys possess a good combination of high
strength and toughness, but do not have the levels of atmospheric
corrosion resistance as many other aluminum alloys. Therefore,
these alloys are usually painted or clad for such exposures.
They’re generally clad with a high-purity alloy or a 6xxx series
alloy to greatly resist corrosion. Alloy 2024 perhaps the most
widely known aircraft alloy.
6xxx Series
The 6xxx series are versatile, heat treatable, highly formable,
weldable and have moderately high strength coupled with excellent
corrosion resistance. Alloys in this series contain silicon and
magnesium in order to form magnesium silicide within the alloy.
Extrusion products from the 6xxx series are the first choice for
architectural and structural applications. Alloy 6061 is the most
widely used alloy in this series and is often used in truck and
marine frames. Additionally, some phone case was made from 6xxx
series alloy.
7xxx Series
Zinc is the primary alloying agent for this series, and when
magnesium is added in a smaller amount, the result is a
heat-treatable, very high strength alloy. Other elements such as
copper and chromium may also be added in small quantities. The most
commonly known alloys are 7050 and 7075, which are widely used in
the aircraft industry.
Non Heat-Treatable Alloys
Non heat-treated alloys are strengthened through cold-working. Cold
working occurs during rolling or forging methods and is the action
of “working” the metal to make it stronger. For example, when
rolling aluminum down to thinner gauges, it gets stronger. This is
because cold working builds up dislocations and vacancies in the
structure, which then inhibits the movement of atoms relative to
each other. This increases the strength of the metal. Alloying
elements like magnesium intensify this effect, resulting in even
higher strength.
3xxx Series
Manganese is the major alloying element in this series, often with
smaller amounts of magnesium added. However, only a limited
percentage of manganese can be effectively added to aluminum. 3003
is a popular alloy for general purpose because it has moderate
strength and good workability and may be used in applications such
as heat exchangers and cooking utensils. Alloy 3004 and its
modifications are used in the bodies of aluminum beverage cans.
4xxx Series
4xxx series alloys are combined with silicon, which can be added in
sufficient quantities to lower the melting point of aluminum,
without producing brittleness. Because of this, the 4xxx series
produces excellent welding wire and brazing alloys where a lower
melting point is required. Alloy 4043 is one of the most widely
used filler alloys for welding 6xxx series alloys for structural
and automotive applications.
5xxx Series
Magnesium is the primary alloying agent in the 5xxx series and is
one of the most effective and widely used alloying elements for
aluminum. Alloys in this series possess moderate to high strength
characteristics, as well as good weldability and resistance to
corrosion in the marine environment. Because of this,
aluminum-magnesium alloys are widely used in building and
construction, storage tanks, pressure vessels and marine
applications. Examples of common alloy applications include: 5052
in electronics, 5083 in marine applications, anodized 5005 sheets
for architectural applications and 5182 makes the aluminum beverage
can lid.
