roof of aluminum

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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).

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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.
Q:How do I melt Aluminum cheaply and easily?
Aluminum alloys melt at around 1200 degrees, aluminum cans maybe somewhat lower, but I doubt a tin can would hold up long enough to melt much aluminum, and you would need to be very careful, any moisture in your mold will cause the aluminum to literally explode back into your face. I am not saying it couldn't be done, but you really would need lots of safety equipment before trying it.
Q:My house has aluminum wiring?
RE: My house has aluminum wiring? I bought a house with aluminum wiring. Its about 1600 square feet. I have not had any problems with the electric but I read all these story's about how terrible aluminum wiring is.. is it worth the cost to replace? Most houses on my street have it also.. they have had no problems.. house was...
Q:why intact aluminum sheet stop quicker than pectinate one in the magnetic field?
while swinging in the magnetic field, intact aluminum sheets will formulate inner eddy current,that is the annular induced current.eddy current will transform the mechanical energy into heat energy, which makes the aluminum sheet stop quickly.but pectinate aluminum sheet can't formulate intact eddy current, so intact aluminum sheet stop quicker than pectinate one.
Q:How to clean the aluminium oxide on the surface of aluminum? What kind of materials should we use to clean the thin aluminum sheet, and what's the concentration?
you can answer sodium hydroxide solution, dilute acid is useless, aluminum's oxide film is very thick,as for concentration, aluminum will be passivating in concentrated sulfuric acid. if you are high school student,higher concentration is better, you can complete deoxidation by abrasive paper.
Q:gluing aluminium foil to plastic?
Gluing Aluminum
Q:How can you turn aluminum oxide into Al?
ensure u have distilled water cuz if there is salt in it, u might finally end up freeing chlorine interior the air and die. haha. ok, take a 9 -12 volt battery or something like that and placed 2 wires from the positve and unfavourable ends interior the water. the only cord that bubbles extra is the hydrogen. so turn a attempt tube and placed it interior the water and so as that there is not any air interior the attempt tube. whilst the cord is going in, the hydrogen will fill it up and u'll be left with organic hydrogen interior the tube. i don't be conscious of if i defined it perfect yet there are a team of video clips on youtube. examine them out.
Q:When you mix sodium hydroxide with water then add aluminum hydrogen gas is given off, is this from the water?
Aluminium does not normally react with water because of a surface coating of the highly unreactive Al2O3 that forms on exposure to atmospheric oxygen. In the presence of strong base, however, this compound dissolves due to complexation by hydroxide, similarly to how silver chloride dissolves in ammonia. Al2O3(s) + 2OH-(aq) + 3H2O(l) ----- 2[Al(OH)4]-(aq) Once this has occured, aluminium metal, a very strong reducing agent, is exposed to water. 2Al(s) + 6H+(aq) ----- 2Al3+(aq) + 3H2(g) Even though the solution is alkaline, there is still a low concentration of H+ formed by the autoprotolytic dissociation of water. The Al3+ formed then reacts with hydroxide to produce more [Al(OH)4]-. Yes, the hydrogen gas is from the water.
Q:Can you please answer this question about the MacBook Aluminum?
If I'm not sure about the processor's. I dont use Mac that often!
Q:what's the size of aluminum sheet circle?
aluminum sheet circle's texture 1060, 3003 thickness 0.4-5.0mm, diameter 190-760mm.

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