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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:a calculation for aluminium and copper wires?
Copper has lower resistance per unit volume, ie, a 1 cm diameter copper wire has less resistance than a 1 cm aluminum wire. BUT, aluminum is much lighter than Cu for the same diameter. If you used an aluminum wire that weighs the same as the 1 cm diameter copper wire, it would have LOWER resistance. And that is why aluminum is used in power transmission, and also in aircraft, where weight is important. to do this you calculate density resistivity which is (resistivity x density). Here is a partial table: Al 28.2e-9 Ω-m * 2700 kg/m³ = 76e-6 Ω-kg/m² Cu 17.2e-9 Ω-m * 8960 kg/m³ = 154e-6 Ω-kg/m² Ag 15.9e-9 Ω-m * 10500 kg/m³ = 167e-6 Ω-kg/m² Au 22.14e-9 Ω-m * 19300 kg/m³ = 427e-6 Ω-kg/m² Zn 68e-9 Ω-m * 7130 kg/m³ = 485-6 Ω-kg/m² Fe 100e-9 Ω-m * 7870 kg/m³ = 787e-6 Ω-kg/m² Note that Al is half that of Cu.
Q:Are Parakeets allergic to aluminum?
ask a nice bird vet
Q:Aluminum or Chrome Wheels?
Aluminum are lighter, which mean faster car. Stronger, stay cleaner longer. Chrome are more expensive. Just made for people who like being flashy.
Q:Balanced Chemical Equation for Aluminum and Cobalt?
That's pretty sparse. Perhaps the question is referring to a single replacement reaction. Aluminum is above cobalt in the activity series, which allows us to predict that aluminum metal will reduce cobalt ions, while aluminum is oxidized. This occurs as long as there is an ion present which will react with the aluminum oxide layer on the surface of aluminum. This passivating Al2O3 layer keeps aluminum metal from reacting. The presence of chloride ions will break down the passivating layer allowing the aluminum metal below to react. Al2O3(s) + 6H+ + 8Cl- -- 2[AlCl4]- + 3H2O(l) 2Al(s) + 3Co2+ -- 2Al3+ + 3Co(s)
Q:How to sell the super hard 5083aluminum alloy and 5083 aluminum coil?
Among the alloy which cannot endure heat treatment, 5083 aluminum alloy, a kind of high magnesium alloy, has the properties of intensity, machinability, anti-corrosion, electric-arc weldability and aesthetic after anodizing. The main element of 5083 alloy being magnesium, it is endowed with corrosion resistance, weldablility and moderate intensity, thus applicable to maritime areas such as ships, and cars, airplane weldments, metro light rail, and pressure vessel (such as liquid tank truck, refrigerated truck, refrigerated container), refrigerating equipment, television tower, drilling equipment, transport facility, missile parts, armor and so on.
Q:How much can I get for aluminum cans in ga?
The price for scrap aluminum cans varies litteraly every day. Within the last year, it has been between about 28 cents and 50 cents a pound. The last price I saw for clean, flattened cans delivered to the dealer was about 42 cents. As I said, it could be a bit higher or lower than that now. There are about 30-32 cans per pound of aluminum, so your 2,000 cans probably weigh around 64 pounds and could be worth about $27, assuming there has been no big change in the price recently. But that's a delivered price. If you have to drive 10 miles each way and your truck gets 20 mpg, you will be paying for a gallon of gas. If it is 30 miles each way (60 miles total), you are looking at 3 gallons of gas, which is probably about $8, leaving you a profit of around $19, or maybe a little less. That's with some optimistic assumptions, and it doesn't include the cost of big plastic bags to carry the cans. Not very encouraging, is it? Recycling makes sense for a big city or a recycling center, where they can get thousands of cans a day. But it is hard for an individual to make any money at it. i know this is not what you wanted to hear, but I hope it is helpful anyway.
Q:Why there is always impression and indentation on the backup roller of aluminum coil rolling mill with 4 rollers.
It is either the external or the bearing problem in designing and installing.
Q:Classification of aluminium rolls for aluminium rolls
On behalf of 6061, mainly contains two elements of magnesium and silicon, so it focuses on the advantages of the 4000 series and the 5000 series, and the 6061 is a cold treatment aluminum forging product, which is suitable for applications with high corrosion resistance and oxidation resistance.
Q:What is in aluminum foil? What is its molar mass?
just use aluminum and goto the periodic table of elements. its all aluminum. they used to make it of tin.
Q:How many grams of an original 6000 g of aluminum-24 will remain?
so it 6000/ (2*8*24*60*60) 0.00434027778 grams have you heard of the internet an unless your mom is a chem teacher it doesnt mean much

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