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| Properties of 5052 aluminum sheet |
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Posted by: aluhm - 01-12-2018, 01:49 AM - Forum: Knowledge & Technique
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5052 aluminum sheet belongs to Al-Mg alloy, with a wide range of applications, particularly the construction industry cannot do without this alloy, and it is the most promising alloy. Good corrosion resistance, excellent weldability, good cold workability, and moderate intensity. For the manufacture of aircraft fuel tank, tubing, and vehicles, ships sheet metal, ship instrument street lights, frame and rivets, metal products, electrical shell. Let's take a look at the process performance of 5052 aluminum sheet.
Formability :
1. 5052 aluminum sheet has good hot plastic process. The forging and die forging temperature is 420 ~ 475°C, and the deformation rate is more than 80% in this range.
2. The cold stamping performance is related to the status of aluminum alloy, and 5052 aluminum sheet has a good cold stamping performance in annealed condition.
Welding performance ：
1.5052 aluminum sheet has a good performance in gas welding, arc welding, resistance welding, spot welding and seam welding performance, but 5052 aluminum sheet may appear ystal crack in argon protected welding, its brazing performance is good, but a poor soldering performance.
2.5052 aluminum sheet has a high intensity and plasticity, weld strength can reach to 90% to 95% of the matrix metal strength, but its weld tightness is not high. So we recommend the 5A03 alloy solder, it can improve the weld tightness and eliminate cracks.
3.The cutting machining properties of 5052 aluminum sheet is not good in annealed condition, but has a perceptible improvement in the process of cold hardening.
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| What if I put aluminum foil in the microwave? |
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Posted by: aluhm - 01-11-2018, 03:34 AM - Forum: aluminium faq
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The microwave oven is one of the great inventions of the 20th century -- you can find them in millions of homes and offices around the world. At one time or another, we've all been told not to use metal products, especially aluminum foil, when cooking with a microwave oven. Stories of incredible explosions and fires usually surround these ominous warnings. Why is that? Let's take a look at how microwave ovens work to find out.
As incredible as microwave ovens are, the technology behind them is fairly simple. Microwave ovens use microwaves to heat food. Microwaves are radio waves. In the case of microwave ovens, the commonly used radio wave frequency is roughly 2,500 megahertz (2.5 gigahertz). Radio waves in this frequency range have an interesting property: Water, fats and sugars absorb them. When absorbed they're converted directly into atomic motion -- heat. Microwaves in this frequency range have another interesting property: Most plastics, glass or ceramics don't absorb them. But what about metal?
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| Why do we use aluminium foil for wrapping food?? |
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Posted by: 1-LVDCPN - 01-11-2018, 03:34 AM - Forum: aluminium faq
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aluminium has high thermal diffusivity ;therefore heat will diffuse swiftly through the foil.What is the logic behind wrapping our food items in aluminium foil ?? A sheet of paper has much lower thermal diffusivity as compared to aluminium foil so any food item wrapped in a sheet of paper will remain warmer for more duration as compared to food item wrapped in aluminium foil..right?
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| How Does Aluminum Foil Keep The Food Warm? And Is It Safe? |
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Posted by: aluhm - 01-11-2018, 02:53 AM - Forum: aluminium faq
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Whether it is lunch for office or college, planning a picnic or travelling, most of us pack our home-made food in aluminum foil and carry it. But have you ever wondered how it keeps the food warm and is it even safe to store food in aluminum foils for longer periods of time? Aluminum foil is made up of aluminum (as the name suggests), which has reflective properties and acts as a barrier to light and oxygen. As a result, the foil reflects the thermal energy back to the food maintaining the inherent aroma, moisture and flavour of the food. It is often used for packaging of perishable foods and dairy products also for longer storage. Aluminum foil’s usage doesn’t only limit to food, it can also be used to put on windows to keep the house cool during summer and hot during winters.
An aluminum foil keeps the food warm, but placing the foil directly on the object or food doesn’t help much. The reason behind this is, if the foil is in contact with the object, the thermal energy would move in the foil itself and might get away, but if the foil is placed a little away from the food then it can properly reflect back the thermal energy and maintain the freshness of the food. So to avoid contact between foil and food, you can add a few layers of butter paper to make air pockets and then add pack in a final layer of aluminum foil.
As aluminum is a poor insulator (substance which doesn’t allow passage of heat) so to make the foil more effective, place it (food wrapped in foil) in fiberglass or ceramic tiffin boxes. It doesn’t only keep the food warmer for long, but also keep things cold.It acts as barrier to the oxygen and air which can transfer heat to the cold or frozen food. Bottom line is it helps by maintaining the temperature of the food, be it warm or cold.
(Also read: Why Cooking in Aluminium Foil Can Be Toxic)
aluminum foil
An aluminum foil keeps the food warm.
Dangers of aluminum foil
Aluminum foil should ideally be used only to keep food warm for shorter periods of time but many people store the food for longer which may have consequences. Any food, if reaches 7- 8 degree Celsius or the time limit of 3-4 hours has exceeded (this may vary depending on the season and outdoor temperatures) then it provides an atmosphere for bacteria to reproduce, so it shouldn’t be outside the refrigerator. The bacteria (lysteria, staph) developed on the food will not be visible but it may cause food poisoning, clammy skin and vomiting.
According to Shalini Manglani, Bangalore based Wellness and Weight Management Expert, “Muslin cloth, food grade brown paper and food grade parchment or butter paper can also be used to wrap foods. Aluminum foil locks moisture and odor in and keeps the food fresh but hot and acidic foods should not be put in aluminum foil as the aluminum will leach into the item.”
parchment paper
Parchment or butter paper can also be used to wrap foods.
Although aluminum foil is there to keep your food warm, it doesn’t harm to try other alternatives too as suggested by experts. For most working people, eating packed homemade food is a norm. All you need to do is give a little attention to how this food is packed and carried. Be Safe!
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| Is using Aluminium foil unsafe? |
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Posted by: haomeialu - 01-11-2018, 02:50 AM - Forum: aluminium faq
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uses aluminium foil to wrap food and many use it for cooking too, especially during baking and roasting. But if Ghada Bassioni from Ain Shams University Cairo is to be believed, the pleasure of enjoying aluminium wrapped food may just be doing more harm than you know. According to her, "The migration of aluminium into food during the cooking process is above the permissible limit set by World Health Organisation."
Other health studies have suggested high aluminium intake as a reason for reduced growth of brain cells. What cements Bassioni research are several other studies that claim aluminium to be harmful to people with bone diseases. Scientists across the world are trying to establish a link between high levels of aluminium found in brains of Alzheimer's patients.
It is interesting to note here that tin foil was used to wrap foods before aluminium foil was introduced in the market. Many people around the world had complained of food tasting or smelling like tin and hence aluminium and other forms of food wrappings were developed and introduced in the world.
Millions of households may have to switch back to tin foils or other forms of wrapping food if further research proves the point Bassioni is trying to make. There are many other cookware utensils with aluminium in them, but as per Bassioni, layers of other metals in cooking utensils prevent aluminium from being absorbed by the food. She has further explained that aluminium present in cooking utensils during the cooking process gets oxidised.
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| Why does household aluminium foil have one dull side and one shiny side? |
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Posted by: 1-LVDCPN - 01-11-2018, 02:45 AM - Forum: aluminium faq
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SO THAT the shiny side can reflect the heat on to the item to be cooked, using a long-established scientific principle that shiny surfaces reflect heat and light. What has completely mystified me for years, though, is the fact that 99.9 per cent of people I have come across use aluminium foil the wrong way round - with the shiny side outside - thereby reflecting heat away from what they are trying to cook.
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| What is a 20mm thick aluminium plate? |
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Posted by: aluhm - 01-11-2018, 02:35 AM - Forum: aluminium faq
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Firstly, aluminum plate means aluminum material which has the thickness of above 0.2 mm and under 500 mm, the length between 200 mm to 16 m.
Then 20mm thick aluminum plate means the thickness of this kind of aluminum plate is 20 mm, the thickness of aluminum plate is higher then that of aluminum sheet.
And to aluminum plate, it has many models from 1000 series to 8000 series with different alloy content and physical, chemical performance. The common models are 1060, 1050, 1100, 3003, 5052, 5083, 6061, 8011 aluminum plate and so on. Aluminum plate have widely application area such as lighting lamp , solar reflected, building exterior, interior decoration, ceiling, metope, furniture, cabinets, elevator, signs, nameplate, luggage, automotive interior and exterior decoration, indoor decorations, frame, household appliances: refrigerators, microwave ovens, audio equipment, aerospace and military aspects, satellites, machinery parts processing, mold manufacturing, chemical thermal insulation pipe coating.
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| Best way to cut aluminum on a budget?!? |
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Posted by: 1-LVDCPN - 01-11-2018, 02:16 AM - Forum: aluminium faq
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I have been cutting up some aluminum diamond plate (about 3/16 thick) and have tried the following methods.
Jig saw, very slow and just doesn’t work very well regardless of what blade I use, Grinder with a cut of wheel is even worse. The fastest thing I have found so far is a skill saw with a wood carbide blade. But after 20 or so cuts the blade gets dull and gummed up, it’s also loud as **** and make a huge mess and I can only do straight cuts.
Is there a tool that would make my life easier? Like some metal shears or something along that line and is under $150.
Thanks in advanced.
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| How to paint aluminum diamond plate and how durable? |
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Posted by: 1-LVDCPN - 01-11-2018, 01:59 AM - Forum: aluminium faq
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so I'm thinking about possibly painting the aluminum "diamond" plate on the rear Kaymar bumper. It's in natural state apparently, possibly with old OEM clear coat since it's not oxidized much if at all. I may want to go satin black. A DIY job, rattle can and all. Don't want to have to go to powdercoat, bead blast etc.
Any recommendation as to specific prep (DIY etching?) and paint for something that will be stepped on a fair amount? I need to minimize costs so fancy paintshop prep agents may be out.
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| What is the weight difference between a similar size cold and hot rolled plate |
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Posted by: aluhm - 01-11-2018, 01:52 AM - Forum: aluminium faq
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In aluminum sheet industry, there are many different types of aluminum sheets, they can divided into many models by different ways. When the classification is according to different production process, the aluminum sheet alloy can be divided into cold rolling aluminum sheet and hot rolling aluminum sheet. What are the difference between them?
The difference between cold rolling and hot rolled aluminum sheet plate is as follows:
Firstly, the production process is different. The cold rolling aluminum sheet producing process is started from cast volume(8 mm thickness) which is made by cast machine, then rolling the cast volume by cold rolling machine. While the hot rolling aluminum sheet is made by heating aluminum ingots (400-500 mm thickness), and then rolling it by hot rolling machine at high temperature.
Secondly, different raw material supply. The hot rolling billet material is casting aluminum ingots though heating and rolling, The cold rolling billet material is casting roll for cold rolling.
Thirdly, different performance. The hot rolled aluminum plate is with good surface quality, oxidation effect, bending performance, and strong mechanical properties and ductility. The cold rolling aluminum sheet is with poor mechanical properties and high hardness, so the cold rolling aluminum sheet is commonly used for mould material, and hot rolled aluminum sheet is more suitable for deep drawing process.
In generally speaking, the internal organization of hot rolling aluminum sheet is stable and uniform, hot rolling process is complex, the price is higher than cold rolling. The 1and 3 series of aluminum sheet on the market at present are all cold rolling, and other series is hot rolling, but 1 and 3 series can also be hot rolling producing, but the price is higher.
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