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| Common types of aluminum checker plate and the importance of cleaning it |
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Posted by: haomeialu - 02-24-2018, 06:24 AM - Forum: Knowledge & Technique
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Aluminum checker plate is aluminum sheet with patterns on its surface. There are many types of aluminum checker plate and can be used in different industries.
1, ordinary aluminum alloy sheet, is to ordinary 1060 aluminum as raw materials for processing, production and processing costs are relatively low, suitable for general conditions of the cold, the vehicle floor;
2, aluminum-manganese alloy plate is made of aluminum-manganese alloy 3003 as the main raw material for processing, with a certain degree of strength and impact resistance, a certain degree of anti-rust and anti-corrosion, which are mainly used in the train compartment;
3, aluminum-magnesium alloy sheet is made of 5052 or higher grade aluminum with high strength and hardness, strong antirust and corrosion resistance, which can be used in ships and even the aerospace industry.
Aluminum checker plate is also a metal material, in the course of daily use also need to use scientific methods for maintenance.
1, regular cleaning, stains on the surface to use water or the corresponding stain removal agent for cleaning, stain easily lead to corrosion of plate deformation;
2, the use of professional spraying agent on the sheet surface coating, on the one hand to the pattern of aluminum to form a barrier to effectively prevent corrosion, on the other hand it can play the role of beautification and decoration to help it better integrated into Among the use of the environment
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| Some advice on the cleaning of alumina sheets for construction |
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Posted by: haomeialu - 02-24-2018, 06:09 AM - Forum: Knowledge & Technique
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After anodizing, aluminum alloy plate has a strong metallic texture, light weight, good durability and recyclability. Due to these characteristics, anodized aluminum plate has become the best aluminum surface treatment method used in architectural applications after the anodized aluminum alloy plate has a strong metal texture, light weight, durable and recyclable. However, no matter what kind of building needs regular cleaning and maintenance to make the service life of the building longer, the following is some suggestions for cleaning aluminum oxide board.
The key to the long-term sustainability of a building is its low maintenance costs after construction. The completely smooth, non-porous surface of the non-electrostatic anode layer reduces dust and dirt deposits, reducing cleaning frequency and labor costs. One of the biggest benefits of building an alumina board is that it keeps its surface clean by rainwater flushing. Therefore, architects need to be able to clean the building by designing natural rainwater. However, cleaning with natural rain alone is not enough. It is necessary to maintain the finish by periodically maintaining the surface of the alumina plate and to protect the surface from potential damage.
If you regularly clean the building from the very beginning, cleaning can become easier and less expensive. It is recommended that the building façade should be cleaned at least once a year and that the frequency of cleaning should be adjusted to the specific circumstances of the area, as is the case in industrial environments where there is usually a relatively high amount of dust and therefore cleaning operations may need to be performed more frequently. It should be noted that, those not flushing the natural rain groove or dust accumulation area, the need to intensify the cleaning efforts, the more frequent cleaning is more easy to clean maintenance. When cleaning, the general use of mild detergent can clean the surface of alumina, be careful not to use a strong alkaline detergent to clean the surface. After cleaning, all surfaces should be flushed to eliminate any residual dirt and detergent.
If the alumina board is cleaned and properly maintained, the life of a building using high-quality alumina board will last for decades.
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| Aluminum surface treatment process expands the new use of aluminum alloy |
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Posted by: haomeialu - 02-24-2018, 06:06 AM - Forum: Knowledge & Technique
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The anodized aluminum plate is very popular aluminum plate type that is favored by customers. It is widely used in many areas in our lives.
Applications of the anodized aluminum: Standard thickness Anodized aluminum oxide (3um) veneer indoors long-term use does not change color, no corrosion, no oxidation, no rust. Thick anodized aluminum oxide (10um) veneer can be used outdoors, long-term exposure to the sun does not change color. For the anti-corrosion projects with high demand.
Brushed aluminum with beautiful and colorful colors and modern metallic appearance, so the increasing product of metal shell are used drawing skills, in order to achieve the perfect role of beautiful and useful.
Brushed aluminum is the use of a very wide range of applications can be signs, mobile electronic devices, household appliances, construction, decoration and other work. Brushed aluminum color is also very rich, with aluminum fuction, black, rose gold, fog white, stainless steel, gold and other colors to choose from. Different jobs can choose different surface brushed products.
In the use of mobile electronic devices, aluminum manufacturers will choose different products according to different color positioning, more selective. If you want to make the product has a sense of fashion, then the use of rose gold, red, pink and other overhangs of color can attract us, especially young people's eyeballs. If you want to make the product reflect the elegant and elegant and concise, then choose the temperament, black, stainless steel, etc., because the drawing skills itself can show excellent product characteristics.
In the use of household appliances, because the kitchen at the time of the fumes is difficult to avoid, therefore, will choose some dirty stainless steel, black and other surface drawing skills, both dirty and played a perfect decoration role. The common drawing skills and rich color choices on the aluminum surface provide the perfect product for all jobs with corrosion resistance and finishes.
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| The performance and application of 5052 aluminum plate |
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Posted by: haomeialu - 02-24-2018, 06:01 AM - Forum: Knowledge & Technique
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5052 aluminum alloy belongs to Al-Mg-Si series alloy, with a wide range of applications, especially in construction industry, which is the most promising alloy. It has good corrosion resistance, excellent weldability, good cold workability and medium strength. Aluminum is often used in ships and ships, vehicle materials, welding materials for automotive and aircraft panels, pressure vessels, refrigeration units, television towers, drilling equipment, transportation equipment, missile components and armor that require strict fire protection.
![[Image: 5052-aluminum-plate.jpg]](http://thick-aluminum-plate.com/images/pic/5052-aluminum-plate.jpg)
5052 aluminum plate’s main alloying element is magnesium. 5052 marine aluminum plate has good forming performance, corrosion resistance, weldability, medium strength, for the manufacture of aircraft fuel tanks, tubing, and transportation vehicles, ships sheet metal, instrumentation, street lamp bracket and rivets, metal products, electrical shell and so on.
5052 aluminum AL-Mg alloy is the most widely used type of rust-proof aluminum. This kind of alloy has high strength, especially anti-fatigue strength. It has high plasticity and corrosion resistance and can not be strengthened by heat treatment. Plasticity is still good, cold work hardening low plasticity, corrosion resistance, good weldability, 5052 aluminum cutting performance can be poor, can be polished. It is mainly used in the area that requires high plasticity and good weldability. 5052 aluminum low-load parts that work in liquid or gaseous medium, such as fuel tanks, gasoline or lube conduit, a variety of liquid containers and other small loads made by deep drawing parts: Wire used to make rivets.
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| Storage of Aluminum Sheet, Aluminum coils and Aluminum Extrusions |
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Posted by: aluminiumsheet - 02-24-2018, 03:32 AM - Forum: Knowledge & Technique
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most industries, the standard recommendation is to store aluminum inside prior to fabrication. While that is a good recommendation, it probably is unrealistic in the shipbuilding industry, where most welding is performed outside. There are more realistic storage recommendations for shipbuilding.
First, if at all possible, do not stack the aluminum plates in a flat stack on the ground. Storage in this way traps water between the sheets, increasing corrosion rates. Instead, stack the plates on edge to allow water to drain between the pieces. If sheets must be stacked flat, remove any paper interleaving or packing from between the plates. If left in place, the paper will act as a wick and draw water into between the plates. If the sheets are stacked flat, try not to stack one sheet directly on top of another. Instead, insert small wood or aluminum “stickers” between the sheets to let water drain.
All of this is intended to minimize the amount of corrosion, i.e., thick oxide that can form between the stored sheets. Any thick oxides will need to be mechanically removed before welding.
Make Sure You Clean the Parts Adequately Before Welding
Cleaning aluminum before welding consists of two separate and distinct operations. First, all oils, lubricants, machining coolants and other hydrocarbons used in manufacturing must be removed. Any hydrocarbons remaining on the material will get into the welding arc and release hydrogen gas, which causes weld porosity.
Removing hydrocarbons can be done in one of two ways. The most common is to wipe the plate with a clean rag saturated with a good degreasing solvent, such as acetone, toluene, MEK or carburetion cleaner. (Alcohols are not good degreasers and should not be used to clean aluminum.) Alternatively, but less common, the aluminum can be dipped into a tank containing a mild alkaline solution, then rinsed and dried.
Secondly, remove any heavy oxides from the aluminum before welding. This is normally done by hand or mechanically using a stainless steel wire brush. In cases where the materials are stored outside and develop a heavy gray oxide, it may be necessary to remove the oxide using a sanding or grinding disk.
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| When Should You aluminum welds Preheat? |
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Posted by: aluminiumsheet - 02-24-2018, 03:15 AM - Forum: aluminium faq
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Some people believe that all aluminum welds, both GTAW and GMAW, should be preheated. This isn’t true. In fact, if you have the correct equipment, preheat is rarely necessary.
Additionally, excessive preheat can severely degrade the mechanical properties. The last step in the heat treatment is aging, which is conducted at temperatures between 325 and 400°F. If you preheat to or above the aging temperature, you will ruin the alloy’s mechanical properties.
This is not to say that all preheating is bad. For example, if outside temperatures and humidity are very high, it is acceptable to preheat to 200°F to drive off moisture. Just don’t get carried away.
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| Which Aluminum Alloy plate You Are Welding? |
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Posted by: haomeialu - 02-24-2018, 02:30 AM - Forum: aluminium faq
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It isn’t enough to know that you are welding aluminum plates . Welding professionals have to know which alloy is about to be welded, and they have to know the correct filler metal to use. The most common alloys used in shipbuilding are the Al-Mg 5XXX sheet alloys and the Al-Mg-Si 6XXX extrusion alloys, primarily because of their excellent resistance to corrosion.
![[Image: Bild-1-EN.jpg]](http://thick-aluminum-plate.com/images/Bild-1-EN.jpg)
Most Aluminum Alloy plates are easily arc weldable. Virtually all of the alloys in the 1XXX, 3XXX, 4XXX, 5XXX and 6XXX series can be arc welded using GTAW and GMAW. However, most of the alloys plates in the 2XXX and 7XXX series cannot be arc welded. The only arc weldable alloys in the 2XXX series are 2219 and 2519. Almost all of the other 2XXX alloys will crack severely when welded. Similarly, the only alloys in the 7XXX family that can be arc welded are 7003, 7004, 7005 and 7039.
Specifically, be particularly wary of 2024 and 7075 aluminum plate. It is tempting to buy one of these alloys for repair welding because they are strong and commonly available, but they are crack-sensitive to arc welding.
Welding an “unweldable" alloy or using the wrong filler alloy can result in immediate cracking or a premature failure in service at a later time.
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| Tips for Welding Aluminum in the Shipbuilding Industry |
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Posted by: aluhm - 02-24-2018, 02:21 AM - Forum: Knowledge & Technique
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Aluminum alloys are lightweight and corrosion-resistant in marine environments, making the superior material for use in the shipbuilding industry.
There are two aspects that make general aluminum welding different from welding steel in the shipbuilding industry, and both are related to the fact that much of the welding is performed outdoors:
Storage of aluminum plates and extrusions is critical to avoid oxidation
Extra care must be taken to avoid breezes in the welding area
Both aspects will be discussed in more detail on the next few pages.
Know Which Aluminum Alloy You Are Welding
It isn’t enough to know that you are welding aluminum. Welding professionals have to know which alloy is about to be welded, and they have to know the correct filler metal to use. The most common alloys used in shipbuilding are the Al-Mg 5XXX sheet alloys and the Al-Mg-Si 6XXX extrusion alloys, primarily because of their excellent resistance to corrosion.
Most aluminum alloys are easily arc weldable. Virtually all of the alloys in the 1XXX, 3XXX, 4XXX, 5XXX and 6XXX series can be arc welded using GTAW and GMAW. However, most of the alloys in the 2XXX and 7XXX series cannot be arc welded. The only arc weldable alloys in the 2XXX series are 2219 and 2519. Almost all of the other 2XXX alloys will crack severely when welded. Similarly, the only alloys in the 7XXX family that can be arc welded are 7003, 7004, 7005 and 7039.
Specifically, be particularly wary of 2024 and 7075. It is tempting to buy one of these alloys for repair welding because they are strong and commonly available, but they are crack-sensitive to arc welding.
Welding an “unweldable" alloy or using the wrong filler alloy can result in immediate cracking or a premature failure in service at a later time.
When Should You Preheat?
Some people believe that all aluminum welds, both GTAW and GMAW, should be preheated. This isn’t true. In fact, if you have the correct equipment, preheat is rarely necessary.
Additionally, excessive preheat can severely degrade the mechanical properties. The last step in the heat treatment is aging, which is conducted at temperatures between 325 and 400°F. If you preheat to or above the aging temperature, you will ruin the alloy’s mechanical properties.
This is not to say that all preheating is bad. For example, if outside temperatures and humidity are very high, it is acceptable to preheat to 200°F to drive off moisture. Just don’t get carried away.
Storage of Aluminum Sheet, Plate and Extrusions
For most industries, the standard recommendation is to store aluminum inside prior to fabrication. While that is a good recommendation, it probably is unrealistic in the shipbuilding industry, where most welding is performed outside. There are more realistic storage recommendations for shipbuilding.
First, if at all possible, do not stack the aluminum plates in a flat stack on the ground. Storage in this way traps water between the sheets, increasing corrosion rates. Instead, stack the plates on edge to allow water to drain between the pieces. If sheets must be stacked flat, remove any paper interleaving or packing from between the plates. If left in place, the paper will act as a wick and draw water into between the plates. If the sheets are stacked flat, try not to stack one sheet directly on top of another. Instead, insert small wood or aluminum “stickers” between the sheets to let water drain.
All of this is intended to minimize the amount of corrosion, i.e., thick oxide that can form between the stored sheets. Any thick oxides will need to be mechanically removed before welding.
Make Sure You Clean the Parts Adequately Before Welding
Cleaning aluminum before welding consists of two separate and distinct operations. First, all oils, lubricants, machining coolants and other hydrocarbons used in manufacturing must be removed. Any hydrocarbons remaining on the material will get into the welding arc and release hydrogen gas, which causes weld porosity.
Removing hydrocarbons can be done in one of two ways. The most common is to wipe the plate with a clean rag saturated with a good degreasing solvent, such as acetone, toluene, MEK or carburetion cleaner. (Alcohols are not good degreasers and should not be used to clean aluminum.) Alternatively, but less common, the aluminum can be dipped into a tank containing a mild alkaline solution, then rinsed and dried.
Secondly, remove any heavy oxides from the aluminum before welding. This is normally done by hand or mechanically using a stainless steel wire brush. In cases where the materials are stored outside and develop a heavy gray oxide, it may be necessary to remove the oxide using a sanding or grinding disk.
Use the Correct Equipment
Before beginning each shift, welders should make sure the welding equipment is correctly set for aluminum. This is especially important if the equipment is interchangeably used to weld different materials.
Specifically for GMAW welding:
Make sure the spool brake is not set too tight. Excessive tension will cause wire feeding problems. The brake should just be tight enough so that the spool doesn’t freewheel when the wire is stopped.
Make sure the drive rolls are made for aluminum and have the correct diameter. Using V groove drive rolls, which are made to weld steel, on aluminum will deform the aluminum wire and cause feeding difficulties.
Set the drive roll tension only tight enough so that the drive rolls don’t slip on the wire. Excessive tension will cause the filler wire to deform.
Make sure the correct plastic inlet and outlet guide bushings are in place. Use of the steel parts used to feed steel wire will cause feeding problems.
Make sure the gun liner is the correct plastic material used for aluminum. Use of the helical steel gun liner typically used to feed steel wire will take small shavings off the soft aluminum wire and cause the liner to clog up.
Make sure the contact tip is the proper size for the aluminum wire being fed. Some people believe it is a good idea to use an oversized contact tip – for example, a 1/16-inch contact tip to feed 3/64-inch wire. DO NOT DO THIS. The tip must be of a size to freely pass the wire through but still tight enough to provide uniform electrical contact between the contact tip and wire. An oversized contact tip will not allow uniform current transfer, resulting in an excessive number of burnbacks.
Use the Correct Shielding Gas Flow Rate
Argon shielding gas flow rates should be a minimum of 35 SCFH for GMAW and 25 SCFH for GTAW. If a large diameter gas cup or gas nozzle is used, flow rates should be increased for both welding processes . If the welding is done outside, the shielding gas flow rates should be even higher – 45 SCFH minimum for GMAW and 35 SCFH for GTAW - because Argon gas is lighter than air and more susceptible to wind and breezes. The lack of shielding gas around the weld puddle will cause porosity. If the shielding gas is an argon/helium mix, the flow rates should be increased by about 25%, since helium provides little cleaning action.
Once the Weld Area Is Cleaned, Keep It Clean
Once the individual pieces are clean and fit up, make the weld as quickly as possible. The primary concern here is not that the parts will oxidize – at room temperature, aluminum oxidizes slowly if kept dry. The real worry is that dirt, oil, water vapor, etc. in the shop environment will contaminate the cleaned material. Once cleaned, fit and assembled, do not let the parts sit unprotected overnight or over the weekend. If the parts must remain unwelded for a period of time, put brown craft paper over the weld seam and tape it in place.
Store Welding Filler Wire Correctly
Aluminum filler wire should be stored in a clean, dry environment, preferably in its original packaging. Under such conditions, the wire has a usable shelf life of several years.
While the wire doesn’t need be stored in air-conditioned surroundings, it does help to store it in conditions of low relative humidity. It must not be allowed to become wet.
The easiest way to do this is to store the wire in its original packaging in closed metal cabinets, which contain an illuminated 60-watt light bulb. The light bulb’s heat will raise the temperature inside the cabinet by 10°F or so, lowering the relative humidity.
Rolls of wire that are partially used should not be left uncovered on the welding machine overnight. They should be returned to their original packaging. Alternatively, there are plastic spool covers available to mount on most wire feeders. Keeping a spool of wire in the feeder until the
spool has been completely used is fine.
Storing wire in an air-conditioned environment can also cause problems. If the wire, which is relatively cold, is brought out into the shop on a hot, humid day and opened immediately, it is possible for the humid air to condense on the wire. If the wire is stored in an air-conditioned room, be sure to bring it out into the shop and sit unopened until it has warmed up. In fact, storage in a dehumidified room is preferable to storage in an air-conditioned room. However, neither is essential if the wire is stored as recommended above.
Weaving and In-Line Oscillation
While everyone agrees that side-to-side weaving across the seam produces excessive heat input and should not be used, it is very common in the some industries for welders to use an in-line weave or “shuffle.” The purpose of the shuffle is to produce the “stacked dime” appearance if the weld isn’t too large. The main advantage of this technique is that it produces obvious regularly spaced weld ripples similar to a GTAW weld. However, the shuffle does not produce improved penetration or cleaning, or a better weld quality. It is merely cosmetic.
Shuffling is fine as long as the amplitude of the shuffle is controlled. It should be about 1/8 inch to 3/16 inch (3 mm to 5mm). If the amplitude of the shuffle is greater than this, it can produce low spots between each weld ripple. This can reduce the weld throat and is not acceptable.
Make Sure You Are Using the Correct Filler Alloy
The most common applications in shipbuilding are joining one of the 5XXX Al-Mg sheet/plate alloys, such as 5052, 5154, 5454 or 5083, to themselves or for joining one of the 6XXX extrusion alloys to a 5XXX alloy.
For joining the 5XXX alloys to themselves, the correct filler is 5554 for welding 5154 or 5454. For welding 5052, 5356 should be used. For welding 5083, which has a higher strength, 5556 or 5183 is recommended because 5356 does not quite match the strength of 5083. 4043 filler should not be used to weld 5XXX alloys, except for 5052, which has low Mg content.
For joining 5XXX sheet or plate to the 6XXX extrusion alloys, such as 6061-T6, the recommended filler alloys are 5356 or 5554. 4043 filler is not commonly used in shipbuilding because of its lower corrosion resistance. There is no advantage in using the higher strength fillers 5183 or 5556 in this application. Some suppliers will try to sell these alloys for this application because they are higher cost, but they are not beneficial.
We have attempted to give some guidance that is helpful to aluminum welders in the shipbuilding industry, though it is by no means comprehensive. Hopefully, this article has given you a few more ideas on how to improve your aluminum shipbuilding welding skills.
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| 5454 aluminium plates for shipbuilding |
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Posted by: haomeialu - 02-24-2018, 02:03 AM - Forum: Knowledge & Technique
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5454 anti-rust aluminum alloy plates is approximately 20% stronger than alloy 5052, and its properties is roughly similar with 5154. However, in some vicious environment, 5454 has a better corrosion resistance than 5154.
5454 aluminium plates is an alloy in the wrought aluminium-magnesium family (5000 or 5xxx series). It is closely related to 5154 aluminium alloy. As an aluminium-magnesium alloy, it combines moderate-to-high strength with excellent weldability. Like 5154, 5454 aluminium is commonly used in welded structures such as pressure vessels and ships. As a wrought alloy, it can be formed by rolling, extrusion, and forging (although forging is not common), but not casting. It can be cold worked to produce tempers with a higher strength but a lower ductility. It is generally not clad.
- Typical material properties for 5454 aluminum alloy include:[2]Density: 2.69 g/cm3, or 168 lb/ft3.Young's modulus: 70 GPa, or 10 Msi.Electrical conductivity: 34% IACS.Ultimate tensile strength: 240 to 300 MPa, or 35 to 44 ksi.Thermal Conductivity: 130 W/m-K.Thermal Expansion: 22.3 μm/m-K.
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| Common problems and causes of 5052 aluminum sheet |
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Posted by: aluhm - 02-23-2018, 07:38 AM - Forum: Knowledge & Technique
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5052 aluminum sheet commonly used in the appearance of electronic parts or accessories, which is widely used in aluminum products, but the production has a number of common problems, such as aluminum sheet surface defects.
The problem of the oxidation of color, black silk, sand holes and other issues of 5052 aluminum sheet oxide is how to produce and what is the reason?
![[Image: 5052-aluminum-sheet.jpg]](http://thick-aluminum-plate.com/images/aluminumsheet/5052-aluminum-sheet.jpg)
There are many reasons of black silk of 5052 aluminium sheet, for example, like affiliated machine rolling oil drops on the poor management, the pressure is too large or too large in surface tension caused by indentation. If you go down the thin material rolling, these dark marks will become more and more thin and form the formation of dark or black line, sometimes it is even unclear whether oil or mark, even on the surface can not see the color difference. But after oxidation ,it is very obvious. For the customer, affirmation is to refuse if they see the inconsistent phenomenon appearance. After the oxidation, the emergence of black silk is one of the most deadly results. Once this happens, there is almost no room for survival, the loss and consequences are irreparable.
The second problem is the color difference. Generally used to make the appearance of the product, color difference is not to be. Any customer is unwilling to accept a similar "two shameless" products. To eliminate these problems, it is necessary to rely on the source column to control.
Sand hole is generally the internal structure, because of impurities in cast billets or vapor not removed, or other elements did not stir and other factors, so we should control the source of ingot casting.
5052 aluminum sheet elongs to Al-Mg alloy, cold forming has good processing performance, processing performance, good corrosion resistance, rust proof aluminum alloy 5052 is a most widely used, this alloy has high strength, especially the anti fatigue strength, ductility and high corrosion resistance, in the semi cold hard plastic is good, do not 5052 alloy used for the internal pressure of the beverage cover, the status of H19 material, do first oxidation treatment to improve coating adhesion and corrosion resistance, both sides painted after the tank cover forming processing, my company production of 5052 alloy lid material with good surface quality, stable performance.
5052 aluminum sheet of haomei aluminium is certificated to ASTM B209 and it can be cut to size at customers’ need. The primarily alloyed with magnesium and chromium which improve the strength of 5052 aluminum sheet Products with different thickness have different tensile and yield strength, as well as elongation, all of which live to international standards. plate is stronger than 1100 and 3003 and it is an excellent candidate for most processing techniques.
5052 Aluminum Alloy sheet is a medium strength alloy containing Magnesium as its major alloying element. 5052 Aluminum Alloy sheet has good workability, a high fatigue strength and is very good for welding. It has very good corrosion resistance to seawater and the marine and industrial atmosphere. Typical applications include aircraft fuel/oil lines, fuel tanks, other transportation areas, sheet metal work, appliances and lighting, wire, and rivets.
Performance advantage:
1,5052 Aluminum Alloy sheet has high plasticity, corrosion resistance, suitable for use in marine environment;
2, the surface of the Aluminum sheet without peeling, bubble, surface rough and local mechanical damage, the surface of the Aluminum sheet without cracks and corrosion spots and trace nitrate;
The company Haomei Industrial Co., Ltd. China's largest Aluminum sheet manufacturers and suppliers, the production of 1-8 series aluminum alloy sheets to provide you with the best price and high quality services
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