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Aluminium alloys with a wide range of properties are used in engineering structures. Alloy systems are classified by a number system (ANSI) or by names indicating their main alloying constituents (DIN and ISO).

The strength and durability of aluminium alloys vary widely, not only as a result of the components of the specific alloy, but also as a result of heat treatments and manufacturing processes. A lack of knowledge of these aspects has from time to time led to improperly designed structures and gained aluminium a bad reputation.

One important structural limitation of aluminium alloys is their fatigue strength. Unlike steels, aluminium alloys have no well-defined fatigue limit, meaning that fatigue failure eventually occurs, under even very small cyclic loadings. This implies that engineers must assess these loads and design for a fixed life rather than an infinite life.

Another important property of aluminium alloys is their sensitivity to heat. Workshop procedures involving heating are complicated by the fact that aluminium, unlike steel, melts without first glowing red. Forming operations where a blow torch is used therefore require some expertise, since no visual signs reveal how close the material is to melting. Aluminium alloys, like all structural alloys, also are subject to internal stresses following heating operations such as welding and casting. The problem with aluminium alloys in this regard is their low melting point, which make them more susceptible to distortions from thermally induced stress relief. Controlled stress relief can be done during manufacturing by heat-treating the parts in an oven, followed by gradual cooling—in effect annealing the stresses.

The low melting point of aluminium alloys has not precluded their use in rocketry; even for use in constructing combustion chambers where gases can reach 3500 K. The Agena upper stage engine used a regeneratively cooled aluminium design for some parts of the nozzle, including the thermally critical throat region.

Another alloy of some value is aluminium bronze (Cu-Al alloy).



Aluminium foil acts as a total barrier to light and oxygen (which cause fats to oxidise or become rancid), odours and flavours, moistness, and germs, it is used broadly in food and pharmaceutical packaging. The purpose of aluminium is to make long-life packs (aseptic processing|aseptic packaging) for drinks and dairy goods, which allows storing without refrigeration. Aluminium foil containers and trays are used to bake pies and to pack takeaway meals, ready snacks and long life pet foods.

Aluminium foil is widely sold into the consumer market, often in rolls of 500 mm (20 in) width and several metres in length.It is used for wrapping food in order to preserve it, for example, when storing leftover food in a refrigerator (where it serves the additional purpose of preventing odour exchange), when taking sandwiches on a journey, or when selling some kinds of take-away or fast food. Tex-Mex restaurants in the United States, for example, typically provide take-away burritos wrapped in aluminium foil.

Aluminium foils thicker than 25 μm (1 mil) are impermeable to oxygen and water. Foils thinner than this become slightly permeable due to minute pinholes caused by the production process.

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Q:What are the classification of aluminum foil compound insulation material?
There are a variety of insulation materials with wide application. The commonly used ones include glass cotton products, heat insulation blankets and heat-insulated foam glass, polyurethane foam glass, etc. The glass cotton products are used in air conditioning insulation, duct insulation, polyurethane foams, extruded polystyrene board, molding of polystyrene, Bakelite resin, mineral fiber products, polyphenyl granule size, compound wood, soft wood, etc. Polyurethane foam is currently a kind of insulation material with minimum coefficient of heat conductivity of 0.018~0.024W/(m·k)in building insulation.
Q:How to calculate the dosage of paint for aluminum coil coating? If the weight is 1 ton, the density 2.71 and the thickness 0.12mm, how much paint is needed?
Coating surface area S*0.12(thickness)*ρ(density) / solid(paint solid)=actual paint consumption brush and roller paint: 100% spray paint: calculated value*70%
Q:Can you tell me how to use aluminum foil grill ?
People used to put food on the frosting side, but it turns out that the shiny side is better, for the shiny side can reflect heat while the frosting with rough surface loses heat. While grilled with the shiny side up, the heat is constantly reflected so that the food can be cooked as soon as possible. If you wrap up the food with the shiny side, the heat is kept inside. It is energy-saving.
Q:What is color aluminum coil?
The base plates are all aluminum, but the surface has been colored.
Q:Whether abandoned aluminum foil has recovery value?
Preparation of the main raw material utilization bauxite, aluminum hydroxide, zeolite spent catalyst, there are a wet preparation method, electrolysis method or the like. Some scholars believe that the economic value of waste aluminum foil having a high recycling. He used the scope of waste aluminum foil prepared PAC optimal conditions and water purification through experiments.
Q:what kind of abradant should be used in the deburring of aluminum sheets? How to grind?
you can use deburring brush,grinding fluid,abrasive powder and other consumables.
Q:How does aluminum ingot be processed to aluminum coil (aluminum sheet)?
This depends on what aluminum ingot is. Small ingot needs to be casted into big one by putting into the melting furnace, and then be rolled to aluminum coil through rolling mill.
Q:What's the difference between non-backing aluminum foil and backing aluminum foil and what's the features?
Non-backing aluminum foil is the normal aluminum foil, a piece of foil, for example, the aluminum in a bottleneck of top-grade wine. There are tiny holes in the appearance and odor is easily to be leaked. But it is soft and can cover goods in any shape. Aluminum foil with backing: adding a film-like material in normal aluminum foil, for example paper to increase the strength and decrease the leak caused by the tiny holes in the appearence of aluminum foil. The most common example is the piece of thing in cigarette box.It ahs a good sealing performance, especially for odor. 20 years ago, I am the main operator of rough mill of aluminum foil. One machine costs more than 100 million and is with more than 170 kilowatt. It's a good experience of using it.
Q:What's the difference between colored aluminum and coated aluminum foil?
According to your description, I suggest you adopt acid pickling process. The basic principle is that aluminum foil will conduct oxidation reaction after being put into the acid to change the color of aluminum foil, which will meet your requirement. The color belongs to aluminum itself not painted by people! This method can get many colors like golden and milky. Different acid ratio will lead to different color.
Q:what's the difference between the knocking voice of aluminum sheet and stainless steel?
The voice of aluminum sheet is toneless, and the voice of stanless steel is more crisp.

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