Aluminium Products Suppliers Most Popular

Aluminum is one of the most used metals in today’s society – Aluminium Products Suppliers in Most Popular  it can be found across a number of industries, such as construction and commercial, and in a number of applications, such as beverage cans and appliances. When choosing a manufacturer of aluminium extrusion for supplying the metal that you use in your workplace, however, it is important that you carefully consider which one will be best for your needs.

Aluminium Window Frames Catalogue

The manufacturer will begin by removing the aluminium from deep within the earth’s crust (either as bauxite ore or feldspar). Often, the Bayer’s method, Wohler’s method or Hall Heroult method is chosen to remove the metal in its molten form. It is then hardened and moulded into whatever shape the manufacturer desires. When the aluminium is extracted from the earth in its solid form, Aluminum T Frame it will be passed through a number of mechanical processes that are designed to give the metal its desired shape. These processes include: rolling, drawing, forging, spinning, piercing and extrusion.

Alspec Aluminium Catalogue

Regardless of whether aluminium has been found in its molten or solid form, the manufacturer will then pass it through either a hot working or cold working process to prepare it for their customers. When using the hot working process (the most popular of the two), a billet will be heated to a temperature of over 79 degrees Celsius, which will allow the aluminium to be easily distorted and placed into its desired shape.

Aluminium Windows

The reason for the popularity of the hot working process over the cold working one can be fully realized when you compare aluminium extrusion to squeezing toothpaste out of its tube. It is much easier to extrude the metal when it is malleable, meaning that it must have been heated to a certain temperature.

Finally, the aluminium will pass through an extrusion and drawing process that runs almost parallel to each other. This is the final step in the whole extrusion process and is the step that gives the metal its entire shape. Deep drawing, for example, is used give the metal a cup, conical tapered, cylinder and seamless tube shape. For less curved shapes, Buy Aluminum Extrusion the drawing process is skipped.

Aluminium Window Frames Catalogue

Once you are satisfied with the processes and methods utilized by a potential manufacturer of aluminium extrusions, you can begin submitting your orders with them. If, after your first delivery, you are still satisfied with the manufacturer based on the promptness of the order being filled and the quality of the aluminium that you receive, you can continue the relationship.

Aluminium Products Suppliers in Most Popular?

Alspec Aluminium Catalogue

Aluminum sliding doors are located in various rooms of a building. This could be used as terrace or patio doors leading into the garden. Other places could be on first floor leading into the balcony from a family room upstairs or bedroom. The are different types used, one side fixed and other sliding and or two sliding panels and a fixed one. The room and size of opening determines which type to use. This also determines the glazing to be put.

When ready to fix an aluminum sliding door, whether due to replacement or anew, first measure the opening. Ensure that all railings , rollers, glazing are all in place. Line the opening smooth with plaster and check sides, floor and top. Ensure corners are square, jambs are plumb while top and bottom level. Fix the frame work by screwing into the reveals and jambs. Hacking the bottom part slightly recesses the framework for it to be flush with floor.

After the aluminum sliding door framing is in place, assemble the fixed part. Take the glazing and tie the frame round, it while inserting the rubber lining. Slide this panel and screw it into the frame firmly. Start sliding panel assembly and fix glazing as before, insert the rollers and push into the guiders. Let the panel roll along to the fixed side. screw adjust the wheels by pushing them up or down. Clean debris on guiders and remove dust.

Now that aluminum sliding door is assembled, place correctly each panel. Ensure that the fixed panel is on the outer guider and sliding part in the inside one. This prevents draught during windy days. Add the linings on the grooves provided to stop shaking during windy days or when opening. Add the locking latch and test the mechanism when inside and outside the room. Fix the alarm system if provided on moving panel and frame,then clean the door.

Metal Fabrication Equipment - Examples of Machines Used in Various Industries

Aluminium Windows South Africa

High strength aluminium alloys.

The origin of aluminium alloys in aircraft construction started with the first practical all-metal aircraft in 1915 made by Junkers in Germany, of materials said to be `iron and steel'. Steel presented the advantages of a high modulus of elasticity, high proof stress and high tensile strength. Unfortunately these were accompanied by a high specific gravity, almost three times that of the aluminium alloys and about ten times that of plywood. Aircraft designers during the 1930s were therefore forced to use steel in its thinnest forms. To ensure stability against buckling of the thin plate, intricate shapes for spar sections were devised.

In 1909 Alfred Wilm, in Germany, accidentally discovered that an aluminium alloy containing 3.5 per cent copper, 0.5 per cent magnesium and silicon and iron, as unintended impurities, spontaneously hardened after quenching from about 480°C. The patent rights of this material were acquired by Durener Metallwerke who marketed the alloy under the name Duralumin. For half a century this alloy has been used in the wrought heat-treated, naturally aged condition. The improvements in these properties produced by artificial ageing at a raised temperature of, for example, 175°C, were not exploited in the aircraft industry until about 1934.

In addition to the development of duralumin (first used as a main structural material by Junkers in 1917) three other causes contributed to the replacement of steel by aluminium alloys. These were a better understanding of the process of heat treatment, the introduction of extrusions in a wide range of sections and the use of pure aluminium cladding to provide greater resistance to corrosion. By 1938, three groups of aluminium alloys dominated the field of aircraft construction and, in fact, they retain their importance to the present day. The groups are separated by virtue of their chemical composition, to which they owe their capacity for strengthening under heat treatment.

The first group is contained under the general name duralumin having a typical composition of: 4 per cent copper, 0.5 per cent magnesium, 0.5 per cent manganese, 0.3 per cent silicon, 0.2 per cent iron, with the remainder aluminium. The naturally aged version was covered by Air Ministry Specification DTD 18 issued in 1924, while artificially aged duralumin came under Specification DTD 111 in 1929. DTD 111 provided for slight reductions in 0.1 per cent proof stress and tensile strength.

The second group of aluminium alloys differs from duralumin chiefly by the introduction of 1 to 2 per cent of nickel, a high content of magnesium and possible variations in the amounts of copper, silicon and iron. `Y' alloy, the oldest member of the group, has a typical composition of. 4 per cent copper, 2 per cent nickel, 1.5 cent magnesium, the remainder being aluminium and was covered by Specification DTD 58A issued in 1927. Its most important property was its retention of strength at high temperatures, which meant that it was a particularly suitable material for aero engine pistons. Its use in airframe construction has been of a limited nature only. Research by Rolls-Royce and development by High Duty Alloys Ltd produced the `RR' series of alloys. Based on Y alloy, the RR alloys had some of the nickel replaced by iron and the copper reduced. One of the earliest of these alloys, RR56 had approximately half of the 2 per cent nickel replaced by iron, the copper content reduced from 4 to 2 per cent, and was used for forgings and extrusions in aero engines and airframes.

The third and latest group depends upon the inclusion of zinc and magnesium and their high strength. Covered by Specification DTD 363 issued in 1937, these alloys had a nominal composition: 2.5 per cent copper, 5 per cent zinc, 3 per cent magnesium and up to 1 per cent nickel. In modern versions of this alloy nickel has been eliminated and provision made for the addition of chromium and further amounts of manganese.

Aircraft structural aluminium.

Of the three basic structural materials, namely wood, steel and aluminium alloy, only wood is no longer of significance except in laminates for non-structural bulkheads, floorings and furnishings. Most modern aircraft still rely on modified forms of the high strength aerospace aluminium alloys which were introduced during the early part of the 20th century. Steels are used where high strength, high stiffness and wear resistance are required. Other materials, such as titanium and fibre-reinforced composites first used about 1950, are finding expanding uses in airframe construction.

Aluminium Window Sections Catalogue

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Aluminium Products Suppliers Ratings

Aluminum is one of the most used metals in today’s society – Aluminium Products Suppliers in Ratings  it can be found across a number of industries, such as construction and commercial, and in a number of applications, such as beverage cans and appliances. When choosing a manufacturer of aluminium extrusion for supplying the metal that you use in your workplace, however, it is important that you carefully consider which one will be best for your needs.

Alspec Aluminium Catalogue

The manufacturer will begin by removing the aluminium from deep within the earth’s crust (either as bauxite ore or feldspar). Often, the Bayer’s method, Wohler’s method or Hall Heroult method is chosen to remove the metal in its molten form. It is then hardened and moulded into whatever shape the manufacturer desires. When the aluminium is extracted from the earth in its solid form, Aluminum Extrusion Framing it will be passed through a number of mechanical processes that are designed to give the metal its desired shape. These processes include: rolling, drawing, forging, spinning, piercing and extrusion.

Aluminium Windows Cape Town

Regardless of whether aluminium has been found in its molten or solid form, the manufacturer will then pass it through either a hot working or cold working process to prepare it for their customers. When using the hot working process (the most popular of the two), a billet will be heated to a temperature of over 79 degrees Celsius, which will allow the aluminium to be easily distorted and placed into its desired shape.

Aluminium Windows Pretoria

The reason for the popularity of the hot working process over the cold working one can be fully realized when you compare aluminium extrusion to squeezing toothpaste out of its tube. It is much easier to extrude the metal when it is malleable, meaning that it must have been heated to a certain temperature.

Finally, the aluminium will pass through an extrusion and drawing process that runs almost parallel to each other. This is the final step in the whole extrusion process and is the step that gives the metal its entire shape. Deep drawing, for example, is used give the metal a cup, conical tapered, cylinder and seamless tube shape. For less curved shapes, Aluminum Extrusions Online Store the drawing process is skipped.

Aluminium Windows

Once you are satisfied with the processes and methods utilized by a potential manufacturer of aluminium extrusions, you can begin submitting your orders with them. If, after your first delivery, you are still satisfied with the manufacturer based on the promptness of the order being filled and the quality of the aluminium that you receive, you can continue the relationship.

Aluminium Products Suppliers in Ratings?

Aluminium Window Frames For Sale

Over the last several years, heavy-weight particle board and cabinet-based displays have lost their appeal and made way for the next innovation in displays systems - truss display systems. Today, exhibitors who want a display that looks substantial without the cost and assembly headache of cabinetry are choosing truss systems.

The Problem

Display systems that use materials such as cabinets and laminate panels to create larger island displays can cost exhibitors thousands in shipping and assembly costs alone for each show. On top of that, constant assembly and tear-down of these systems can leave them chipped, scratched and beat-up after just a few years.

The Solution

Today, while laminate panel systems are still widely used and requested, a new breed of aluminum frame displays can be a less-costly alternative. These systems are sleek, functional, and offer all of the amenities of laminate panel systems, including shelving, overhead lighting, and storage. Additionally, these systems offer versatile and striking visual options including backlit graphics, tension fabric graphics and areas for plasma screens and computer demos.

How They Can Maximize Your Budget

As an alternative to heavier wood displays, aluminum displays are much lighter in weight, making them far less costly to ship. Additionally, many aluminum frame displays assemble without the need for tools, saving money in set-up costs.

Automatic Sliding Aluminum Doors

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Metal fabrication equipment is used in important facets of the manufacturing industry. It serves the structural steel industry very well as it helps in other metal fabricating industries. Producers of this equipment have clients ranging from small and medium size enterprises to iron and fabricating shops and large construction companies.

The most common types of metal fabrication equipment include hydraulic press brakes, pinch rolls, plate shears, bending machines, tube benders and plate rolls. All these machines will help the entire workload easier. Look into the features of these types of equipment.

Hydraulic press brakes

Hydraulic press brakes are created to deliver the kind of ease and comfort an operator is looking for in the product. They are equipped with a ram system to provide maximum efficiency on operator control. Down stroking ram systems are favored over up stroking systems because they lessen operator fatigue. The system with a thick ram makes it easier to move in between extra heavy frames. Alongside with this component, a steel torsion is also utilized. At times, the hydraulic press brake contains limit switches and overload protection systems. Speeds of the press brakes are adjustable and controllable as well.

Hydraulic shears

This is yet another type of metal fabrication equipment used in order to make the job of individuals easier. Looking for those with foot pedals and emergency stops is highly favorable for the company. Programmable axes may help control blade gaps, stroke length, back gauge and shearing times. At times, the shears are also commendable for its capacity to transfer balls and load metal sheets. It also possesses a full protection guard system. Shears are used in order to provide smooth and quiet operation while cutting or manufacturing metal parts.

Plate bending machines

Plate bending machines vary according to specifications of the particular industry making use of this industrial product. There are goods that are best suited for small to medium production requirement for pipes, angles, flats and tubes. Ornamental and job shops will surely favor this type of bending machine. There are plate bending machines that are versatile enough with hydraulic forming features. This is commendable in industries were pipe, tube and aluminum extrusion bending is required.

There are other types of metal fabrication equipment sold by a lot of manufacturers. At times, this equipment may be available from second hand machine stores. What matters is that the machine will work for the particular manufacturing process it has to serve.

Aluminium Window Frames Catalogue

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Aluminium Products Suppliers Tips

Aluminum is one of the most used metals in today’s society – Aluminium Products Suppliers in Tips  it can be found across a number of industries, such as construction and commercial, and in a number of applications, such as beverage cans and appliances. When choosing a manufacturer of aluminium extrusion for supplying the metal that you use in your workplace, however, it is important that you carefully consider which one will be best for your needs.

Aluminium Sections Catalogue

The manufacturer will begin by removing the aluminium from deep within the earth’s crust (either as bauxite ore or feldspar). Often, the Bayer’s method, Wohler’s method or Hall Heroult method is chosen to remove the metal in its molten form. It is then hardened and moulded into whatever shape the manufacturer desires. When the aluminium is extracted from the earth in its solid form, Aluminum Extrusion Framing it will be passed through a number of mechanical processes that are designed to give the metal its desired shape. These processes include: rolling, drawing, forging, spinning, piercing and extrusion.

Aluminium Sections Catalogue

Regardless of whether aluminium has been found in its molten or solid form, the manufacturer will then pass it through either a hot working or cold working process to prepare it for their customers. When using the hot working process (the most popular of the two), a billet will be heated to a temperature of over 79 degrees Celsius, which will allow the aluminium to be easily distorted and placed into its desired shape.

Aluminium Window Frames For Sale

The reason for the popularity of the hot working process over the cold working one can be fully realized when you compare aluminium extrusion to squeezing toothpaste out of its tube. It is much easier to extrude the metal when it is malleable, meaning that it must have been heated to a certain temperature.

Finally, the aluminium will pass through an extrusion and drawing process that runs almost parallel to each other. This is the final step in the whole extrusion process and is the step that gives the metal its entire shape. Deep drawing, for example, is used give the metal a cup, conical tapered, cylinder and seamless tube shape. For less curved shapes, Aluminum Cabinet Frame Extrusions the drawing process is skipped.

Aluminium Window Frames Details

Once you are satisfied with the processes and methods utilized by a potential manufacturer of aluminium extrusions, you can begin submitting your orders with them. If, after your first delivery, you are still satisfied with the manufacturer based on the promptness of the order being filled and the quality of the aluminium that you receive, you can continue the relationship.

Aluminium Products Suppliers in Tips?

Alspec Aluminium Catalogue

The process of aluminum extrusion is simple and easy however it is very significant to know why extrusion is so important. In general metals like steel and aluminum is put to use in several industries, right from automobile, to telecommunication, transport, utensil manufacturing and at times even in the toy industry. Thus, both of these metals are in huge demand and find place is almost all the major manufacturing industries in the world.

Just after steel, aluminum is the other metal which is hugely popular all over the world. This can put in a manner stating that aluminum is the second most popular metal in the globe after steel. The former is widely available, has impressive properties, and is affordable, light weight, can withstand high temperatures and so on. And above all the aluminum extrusion involved in getting different shapes and forms for suppliers is cost-effective and simple. Both in US and Europe building industry and the telecom as well is highly dependent on aluminum extruded products. These products find a number of usages and are used in many applications.

So, what is aluminum extrusion? This is a process through which aluminum is given certain shapes and forms. It starts with the hot cylindrical billet of aluminum which is pushed through a shaped die. The billet is cut from DC cast log and placed in heated container (450°C - 500°C). When pushed through the die the metal flows through the steel die. The die is placed at the other end of the container. Now, once the log passes it produces a section, this can be cut into shapes either in long length or short. The section is cuts according to the customized demands of the clients since the log is meant to be used for any particular industry. In certain extrusion process rectangular shaped billets. In this process only wide section sized extrusions are produced. This again depends according the demands of the supplier.

Aluminum extrusion is done for several kinds of industry and these aluminum extruded products are very commonly used in building industry. In this industry you can use aluminum in prefabricated houses/building structures, window and door frame systems, curtain walling, roofing and exterior cladding, and shop fronts. Besides, they also find place in the telecommunication and transport industry. In transport industry aluminum extruded products are found in rail vehicles, marine applications, airframes and for vehicles on the road.

So, what makes aluminum so popular? It is the versatility and the flexibility of the material that turns in so popular. Since aluminum is high temperature resistance and is corrosion resistant as well it is used to make utensils and is also used on transport vehicles. Besides, it is strong even though it is light weight and thus it is used in airframes.

So, if you are out there still deciding on selecting aluminum extruded products or some other metal you can give your votes to this metal as it is affordable and durable as well. No more second thoughts to this go ahead with aluminum extrusion and the products.

Get the Most Out of Aluminum Railings

Aluminium Windows

Greenhouse kit frames may be made of galvanized steel pipe, aluminum, plastic or wood. It is very important when considering purchasing a greenhouse to look at the type of frame it is constructed of. There are also many different grades of these materials used. With the steel pipe frame you not only have to consider the size of the tubing, but also the spacing of the tubing. Naturally, closer spacing of the bows will result in a stronger frame. This is also true of aluminum frames. The thickness of the aluminum, the spacing and the extra supports will all determine the strength. What type of wood is being used is very important also.

Typically the prices going from low to high will be as follows.

1. Plastic frames
2. Lightweight Aluminum Frames
3. Pipe Frames
4. Wood Frames
5. Heavy Duty Aluminum Frames

Some of these such as the wood frames will require maintenance to keep up. The rest of the frame types are typically maintenance free.

Many consumers simply look at size, shape and price and do not consider that at some point they will probably want to add some accessories such as circulating fans, ventilation systems, hanging heaters, misting or fogging systems, etc. to their greenhouse. With plastic frames it is virtually impossible to add any accessories without building a frame to mount the accessories to. Many times these frames simply are not heavy enough to support even a hanging basket. Usually with wood and pipe frames the strength is there, but you will still need to do some extra framing out to mount the accessories. There are also some lighter weight aluminum frame greenhouse kits which will require additional framing to mount your accessories. Most quality aluminum framed greenhouses will offer a channel where bolts will slide to the exact location you desire to put your accessories. Usually this type of frame will even make it possible to add a wire shelf above your benches for extra space.

These are all just general guidelines. It is best to investigate each greenhouse kit on an individual basis.

Aluminium Window Frames For Sale

 


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Aluminium Products Suppliers Sandton

Aluminum is one of the most used metals in today’s society – Aluminium Products Suppliers in Sandton  it can be found across a number of industries, such as construction and commercial, and in a number of applications, such as beverage cans and appliances. When choosing a manufacturer of aluminium extrusion for supplying the metal that you use in your workplace, however, it is important that you carefully consider which one will be best for your needs.

Alspec Aluminium Catalogue

The manufacturer will begin by removing the aluminium from deep within the earth’s crust (either as bauxite ore or feldspar). Often, the Bayer’s method, Wohler’s method or Hall Heroult method is chosen to remove the metal in its molten form. It is then hardened and moulded into whatever shape the manufacturer desires. When the aluminium is extracted from the earth in its solid form, Aluminum Extrusion Slider it will be passed through a number of mechanical processes that are designed to give the metal its desired shape. These processes include: rolling, drawing, forging, spinning, piercing and extrusion.

Aluminium Windows Pretoria

Regardless of whether aluminium has been found in its molten or solid form, the manufacturer will then pass it through either a hot working or cold working process to prepare it for their customers. When using the hot working process (the most popular of the two), a billet will be heated to a temperature of over 79 degrees Celsius, which will allow the aluminium to be easily distorted and placed into its desired shape.

Aluminium Sections Catalogue

The reason for the popularity of the hot working process over the cold working one can be fully realized when you compare aluminium extrusion to squeezing toothpaste out of its tube. It is much easier to extrude the metal when it is malleable, meaning that it must have been heated to a certain temperature.

Finally, the aluminium will pass through an extrusion and drawing process that runs almost parallel to each other. This is the final step in the whole extrusion process and is the step that gives the metal its entire shape. Deep drawing, for example, is used give the metal a cup, conical tapered, cylinder and seamless tube shape. For less curved shapes, Where To Buy Aluminum Extrusion the drawing process is skipped.

Alspec Aluminium Catalogue

Once you are satisfied with the processes and methods utilized by a potential manufacturer of aluminium extrusions, you can begin submitting your orders with them. If, after your first delivery, you are still satisfied with the manufacturer based on the promptness of the order being filled and the quality of the aluminium that you receive, you can continue the relationship.

Aluminium Products Suppliers in Sandton?

Alspec Aluminium Catalogue

When double glazing first became a popular window choice in the 1960s, most frames were made of aluminum. Aluminum remained the most popular choice for framing double glazing windows through the mid-1980s, when it held over 60% of the market. Since the introduction of PVC window framing, the market share of aluminum framed windows has dropped steadily. As of 2003, less than 17% of windows sold were aluminum framed. There are many reasons for the drop in popularity - and still some good reasons for choosing aluminum over PVC or wood frames.

The early popularity of aluminum was based on price and convenience. Aluminum was far less expensive than wood, the only other choice for window framing in the early years of double glazing. In addition, aluminum is easily extruded in the shapes and lengths needed to frame windows of any shape or size. It's strong, durable and very close to maintenance free.

Aluminum frames do have one significant drawback, however. Aluminum is an excellent conductor of heat and cold. It's such a good conductor, in fact, that in colder temperatures, frost often forms on interior surfaces of the windows close to the aluminum joints. The end result is windows that are significantly less able to conserve heat and energy than those framed in other materials.

PVCu was introduced in the mid-80s as a choice for framing double glazing windows, and immediately began to climb in popularity. When compared with aluminum frames, PVCu was less expensive, and more energy conservative. It can't match the strength of aluminum, however, and there are security concerns with its use. In addition, the introduction of 'thermal breaks' reduces the heat conductivity (measured in U values) of aluminum framed windows significantly. By fitting a less conductive material between the panes of the window as a sort of 'bridge' between the glass, manufacturers can bring the U value of aluminum framed double glazed windows within conservation standards.

The main selling points for aluminum window frames, then, were:

1. Strength - aluminum framed windows are far less prone to warping. The aluminum withstands weather well, needs no painting and forms strong, rigid window frames that will fit for far longer than wood frames.

2. Cost - aluminum frames are far less expensive than wood frames. They are easier to manufacture, and the material is less expensive to begin with. On the other hand, the introduction of PVC has largely negated the advantage of cost. Far lower in price, and with more efficient heating, PVC has become the material of choice for framing double glazing windows.

3. Ease of maintenance - As opposed to wood, which is subject to warping and decay and needs repainting every 3-5 years, aluminum is virtually maintenance free. It never needs painting, doesn't rot or warp, and is rigid and strong enough to bear the load of window lintels with minimal reinforcement.

4. Security - Because of the tight fit possible with aluminum framed double glazed windows, they were - and still are - the choice where security is a paramount concern. It's very difficult to 'pop' an aluminum framed window from its frame if it's properly fitted.

Advanced Aluminum Profile Systems Available on the Market

Aluminium Windows Cape Town

High strength aluminium alloys.

The origin of aluminium alloys in aircraft construction started with the first practical all-metal aircraft in 1915 made by Junkers in Germany, of materials said to be `iron and steel'. Steel presented the advantages of a high modulus of elasticity, high proof stress and high tensile strength. Unfortunately these were accompanied by a high specific gravity, almost three times that of the aluminium alloys and about ten times that of plywood. Aircraft designers during the 1930s were therefore forced to use steel in its thinnest forms. To ensure stability against buckling of the thin plate, intricate shapes for spar sections were devised.

In 1909 Alfred Wilm, in Germany, accidentally discovered that an aluminium alloy containing 3.5 per cent copper, 0.5 per cent magnesium and silicon and iron, as unintended impurities, spontaneously hardened after quenching from about 480°C. The patent rights of this material were acquired by Durener Metallwerke who marketed the alloy under the name Duralumin. For half a century this alloy has been used in the wrought heat-treated, naturally aged condition. The improvements in these properties produced by artificial ageing at a raised temperature of, for example, 175°C, were not exploited in the aircraft industry until about 1934.

In addition to the development of duralumin (first used as a main structural material by Junkers in 1917) three other causes contributed to the replacement of steel by aluminium alloys. These were a better understanding of the process of heat treatment, the introduction of extrusions in a wide range of sections and the use of pure aluminium cladding to provide greater resistance to corrosion. By 1938, three groups of aluminium alloys dominated the field of aircraft construction and, in fact, they retain their importance to the present day. The groups are separated by virtue of their chemical composition, to which they owe their capacity for strengthening under heat treatment.

The first group is contained under the general name duralumin having a typical composition of: 4 per cent copper, 0.5 per cent magnesium, 0.5 per cent manganese, 0.3 per cent silicon, 0.2 per cent iron, with the remainder aluminium. The naturally aged version was covered by Air Ministry Specification DTD 18 issued in 1924, while artificially aged duralumin came under Specification DTD 111 in 1929. DTD 111 provided for slight reductions in 0.1 per cent proof stress and tensile strength.

The second group of aluminium alloys differs from duralumin chiefly by the introduction of 1 to 2 per cent of nickel, a high content of magnesium and possible variations in the amounts of copper, silicon and iron. `Y' alloy, the oldest member of the group, has a typical composition of. 4 per cent copper, 2 per cent nickel, 1.5 cent magnesium, the remainder being aluminium and was covered by Specification DTD 58A issued in 1927. Its most important property was its retention of strength at high temperatures, which meant that it was a particularly suitable material for aero engine pistons. Its use in airframe construction has been of a limited nature only. Research by Rolls-Royce and development by High Duty Alloys Ltd produced the `RR' series of alloys. Based on Y alloy, the RR alloys had some of the nickel replaced by iron and the copper reduced. One of the earliest of these alloys, RR56 had approximately half of the 2 per cent nickel replaced by iron, the copper content reduced from 4 to 2 per cent, and was used for forgings and extrusions in aero engines and airframes.

The third and latest group depends upon the inclusion of zinc and magnesium and their high strength. Covered by Specification DTD 363 issued in 1937, these alloys had a nominal composition: 2.5 per cent copper, 5 per cent zinc, 3 per cent magnesium and up to 1 per cent nickel. In modern versions of this alloy nickel has been eliminated and provision made for the addition of chromium and further amounts of manganese.

Aircraft structural aluminium.

Of the three basic structural materials, namely wood, steel and aluminium alloy, only wood is no longer of significance except in laminates for non-structural bulkheads, floorings and furnishings. Most modern aircraft still rely on modified forms of the high strength aerospace aluminium alloys which were introduced during the early part of the 20th century. Steels are used where high strength, high stiffness and wear resistance are required. Other materials, such as titanium and fibre-reinforced composites first used about 1950, are finding expanding uses in airframe construction.

Aluminium Windows

 


https://ferngully.co.za/tip/

Fern Gully Have Aluminium Suppliers List