Aluminum product for roof

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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’s the difference of activated aluminum and aluminum sheet?
you can use weak acid ,weak base solvent or steam to clean the oil and dirt on the surface, it's activated aluminum, their difference is that activated aluminum has porous structure oxide film.
Q:What is the difference between aluminum sheet and aluminum curtain wall? The cost is high!
The upper and lower layers of the composite aluminum plate are high purity aluminum alloy plates, and the middle is a non-toxic low-density polyethylene (PE) core plate, also called an aluminum plastic plate, and the aluminum veneer is a single aluminum sheet. For appearance, the difference between the two is not large, but the color of aluminum plate is diverse. Price respect, curtain wall uses exterior wall board, aluminous plastic board price is in 100 yuan or so, 2.5mm thick aluminium single board price is in 240 the left and right sides, 3mm single board is more expensive.
Q:Where could I find fairly thing sheets of aluminum?
A local welding shop will have the sheets you need, and is equipped to cut it to size for you.
Q:polish aluminum on my motorcycle?
MOTHERS one to do the polishing....then use a fresh one to buff the aluminum. Trust me on this one.....this is the ONLY polish I use on custom bikes.....with this stuff, you can make aluminum look almost like chrome!!!
Q:Is This Aluminum Oxide?
Aluminum oxide is white and powdery in texture. It also takes a bit longer for aluminum to oxidize than iron, so I don't think you could have cakes of aluminum oxide in 4 days. If the cakes you are describing are reddish in color, then no, it is NOT aluminum oxide. It is good old fashioned ferric oxide- rust from iron.
Q:Facts about aluminium?
Aluminium is remarkable for the metal's low density and for its ability to resist corrosion due to the phenomenon of passivation. Structural components made from aluminium and its alloys are vital to the aerospace industry and are very important in other areas of transportation and building. Its reactive nature makes it useful as a catalyst or additive in chemical mixtures, including ammonium nitrate explosives, to enhance blast power. all the ifo u need isat the link below
Q:how reliable are today's aluminum block engines?
Aluminum Block Engines
Q:How well does aluminum hold up in chlorinated pool water?
Aluminum is not a good choice, even if it's anodized, painted, or powder coated. Pool water is corrosive mostly due to the chloride from chlorination. Steel is slightly less prone to corrosion. Plastic or fiberglass is the best choice.
Q:what's the difference between aluminum sheet detergent and central air-condition detergent?
Central air condition cleaning includes air-cooled condenser cleaning and water-cooling condenser cleaning, if it’s air-cooled condenser cleaning, you can use aluminum sheet detergent.
Q:Why is aluminium not extracted from aluminium oxide?
Well, de facto because the heat of formation of aluminum oxide is so much greater than the heat of formation of iron oxide. If you're looking for something more mechanistic, find Al and Fe in the periodic table. Al and Fe are in different rows, and Fe is larger than Al, so although Al+3 and Fe+3 have the same charge, oxygen bonds less strongly to Fe+3 than to Al+3 because it's further away from the nucleus of Fe. Al+3 has no outer shell electrons at all; 3s, 3p, and 3d subshells are all empty. It's effectively a charged sphere with nothing to interfere with bonding. Fe+3 (as in hematite, Fe2O3) is larger, has filled 3s and 3p subshells, and a half-filled 3d subshell. That 3d electron density projects pretty far out into space, holding oxygen at arms length. Aluminum has no electron density in 3d orbitals, so oxygen can tuck in nice and tight and get a good grip. Any of these hit the mark? I don't know what background you're bringing to this question.

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