Month: July 2019
What is the difference between Aluminium sheets, sheets and coils
Aluminium sheets, sheets and coils. Aluminium Trading supplies aluminum sheets, sheets and coils to hundreds of industries throughout Southern Africa every month. Metal strength, excellent corrosion resistance and lightweight construction make it a very popular material to meet the modern and complex needs of today’s world. In fact, aluminum has become the second largest metal used on Earth after iron/steel. But we still receive a very common question: “What is the difference between an aluminum plate, a plate and a coil?”welded steel pipe manufacturer
When looking at three aluminum products, the only difference is the thickness. The thickest product is the aluminum plate, then the plate, and finally, the coil is the thinnest. However, the exact thickness of each category depends on several factors. Generally, the thickness of the metal is classified according to the metal, the specification, and even the application.
Historical metal standards – inconsistent?
Before the development of modern, accurate measuring equipment and techniques, “meters” are standards used to classify the thickness of metals, especially wires. Over time, the metals industry has formed its own independent standards. This has led to different specifications for aluminum, copper, brass and many different steel grades. An example of this can be seen in the “Unit of Measurement Dictionary”. The publication defines 10 gauge aluminum as 0.259 cm thick, while 10 gauge standard steel is 0.341 cm and 10 gauge galvanized steel is 0.351 cm.square steel tubing for sale
Due to the confusion caused by the measurement system, the American Society for Testing and Measurement (ASTM) describes this in the specification ASTM A480-10a; “The use of gage numbers is discouraged because it is an ancient term with limited usefulness and no meaning is reached. Consensus.”
Modern measurement of metal thickness
Today, the usual practice is to simply specify the exact thickness of any given product. Although the meter is still listed in the US, the term used in industries in South Africa and Europe has become less and less in recent years.
In the case of South Africa’s aluminum and its alloys, there are still some uncertainties in the exact thickness of the metal when it is classified as sheet, sheet or coil, and most distributors and manufacturers decide these classifications. In the aluminum trade, we offer aluminum sheets with a thickness greater than 4.5 mm, aluminum sheets with a thickness of 0.5 mm to 3 mm, aluminum rolls with a thickness of 0.5 mm to 0.6 mm and aluminum foil with a thickness of approximately 0.29 mm.
In order to prove the difference in thickness between different dealers, we contacted Mr. Kent Bell, Marketing Manager of Hulamin, South Africa, and asked them about the classification of aluminum thickness. Hulamin specializes in rolled aluminum products for precision and high-tech applications and is one of the largest producers of rolled aluminum products in Africa.
Hulamin’s aluminum rolling mill – Pietermaritzburg tinplate suppliers
The classification we received from Hulamin is almost identical to our classification. The classification of Hulamin is as follows:
Foil: <0.29mm, sheet/coil: 0.3mm-6.3mm, board: > 6.3mm
Aluminum sheets are the most commonly used form of metal for a variety of industries, from food and beverage containers to electrical appliances, automotive and general manufacturing. Sheet products are especially suitable for roofs and drains. Aluminum panels are used for more structural and heavy applications such as military, rail and marine transportation.
Seamless steel pipe
Seamless steel tubes are round, square, rectangular steel with a hollow section and no seams around them. The seamless steel pipe is a steel ingot or a seamless steel pipe. It is a round, square, rectangular steel with a hollow section and no seams around it. Seamless steel tubes are formed by perforating steel ingots or solid tube blanks, followed by hot rolling, cold rolling or cold drawing. The seamless steel tube has a hollow portion and serves as a conduit for conveying fluid. Compared with solid steel such as round steel, steel pipe has the same bending and torsional strength and is light in weight. It is an economical steel and is widely used in manufacturing structures.seamless steel pipe supplier .Parts and mechanical parts such as oil drill pipes, automotive drive shafts, bicycle frames and steel scaffolding used in construction.
The solid tube blank is perforated into a capillary tube and then formed by hot rolling, cold rolling or cold drawing. The seamless steel pipe has a hollow section and is used as a pipe for conveying fluid. Compared with a solid steel such as round steel, the steel pipe is light in weight when it has the same bending and torsional strength, and is an economical section steel, which is widely used in manufacturing structures. Parts and mechanical parts, such as oil drill pipes, automotive drive shafts, bicycle frames, and steel scaffolding used in construction.
The specifications of seamless steel pipes are usually expressed by the outer diameter * wall thickness (unit: mm). Such as: outer diameter 30mm inner hole 20mm wall thickness is 5mm Generally speaking: Φ30*5. According to the production method, seamless steel tubes can be divided into two categories: hot-rolled seamless steel tubes and cold-rolled (dial) seamless steel tubes. Hot-rolled seamless steel pipes are divided into general steel pipes, low and medium pressure boiler steel pipes, high pressure boiler steel pipes, alloy steel pipes, stainless steel pipes, petroleum cracking pipes, geological steel pipes and other steel pipes. Cold-rolled (dial) seamless steel pipe in addition to general steel pipe, low and medium pressure boiler steel pipe, high pressure boiler steel pipe, alloy steel pipe, stainless steel pipe, petroleum cracking pipe, other steel pipes, including precision steel pipe, carbon thin-walled steel pipe, alloy thin Wall steel pipe, stainless steel thin-walled steel pipe, special-shaped steel pipe, etc.
The outer diameter of hot-rolled seamless pipe is generally larger than 32mm, the wall thickness is 2.5-75mm, the outer diameter of cold-rolled seamless steel pipe can be 6mm, the wall thickness can be 0.25mm, the outer diameter of thin-walled pipe can be 5mm, the wall thickness is less than 0.25mm, cold Rolling is more accurate than hot rolling. In pipeline engineering, hot-rolled pipes are often used when the pipe diameter exceeds 57 mm, and cold drawn (rolled) pipes are often used when the pipe diameter is less than 57 mm.
Generally, the seamless steel pipe is made of high-quality carbon steel such as 10#, 20#, 30#, 35#, 45# or low-alloy structural steel such as 16Mn or 5MnV or alloy structural steel such as 40Cr, 30CrMnSi, 45Mn2 and 40MnB. Cold rolled into. Seamless pipes made of low carbon steel such as 10# and 20# are mainly used for fluid conveying pipes. Seamless tubes made of medium carbon steel such as 45# and 40Cr are usually used to make mechanical parts, such as parts for automobiles and tractors. Generally, seamless steel pipes are required to ensure strength and carry out flattening tests. The hot rolled steel pipe is delivered in a hot rolled state or a heat treated state; the cold rolling is delivered in a heat treated state. Hot rolling, as the name suggests, has a high temperature of the rolled piece, so the deformation resistance is small and a large amount of deformation can be achieved. black carbon steel pipe
Taking the rolling of the steel sheet as an example, the thickness of the continuous casting blank is about 230 mm, and after rough rolling and finish rolling, the final thickness is 1 to 20 mm. At the same time, due to the small width-to-thickness ratio of the steel plate, the dimensional accuracy requirement is relatively low, and the shape problem is not easy to occur, and the convexity is mainly controlled. For the requirements of the organization, it is generally achieved by controlled rolling and controlled cooling, that is, controlling the rolling temperature, finish rolling temperature and crimping temperature of the finishing rolling to control the microstructure and mechanical properties of the strip.