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Which 3 types of the best aluminum alloys for bending?

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Which 3 types of the best aluminum alloys for bending

The aluminum alloys in the bending process

When processing sheet metal parts or designing sheet metal parts, it is often encountered that the aluminum plate cannot be bent, and the bending cracks. The bending of the aluminum plate mainly depends on the state of the material. The state is divided into fully hard, semi-hard, and soft states (usually the soft state is called the O state, and the O state is a state of the aluminum plate. O is the annealed state, that is, the fully soft state, suitable for the processed product that is fully annealed to obtain the lowest strength).

Which 3 types of the best aluminum alloys for bending
Which 3 types of the best aluminum alloys for bending

The bending effect of full hard is basically not good (the state of the aluminum plate is H18, H19, H38, etc. are all hard) The aluminum plate in the semi-hard state can basically be bent (H24 is also semi-hard) O-state bending It is definitely no problem, but because it is too soft, basically there is less bending in this state. When processing sheet metal parts, it is still rare to use pure aluminum materials. Basically all-alloy aluminum (because the hardness of pure aluminum is not very good).

Alloy aluminum is used as sheet metal parts, and 3003, 3005, 5052, and another semi-hard state can be used as sheet metal bending parts. If 6061, 2024, and 7075 are used due to their high hardness, especially those in the T6 state, they should not be bent unless they are heated and then bent. The difference between good aluminum plates and poor aluminum plates is oxidation performance, tolerance, surface effect, and crystal accuracy. and uniform stability, etc., there is little difference in the bending effect alone.

What is the bending coefficient of aluminum alloy?

The aluminum alloy bending coefficient can be used: plate thickness x 1.6, that is to say: after 1mm 5052 aluminum plate is bent, the outermost dimension plus the outermost dimension -1.6mm is the unfolded length. The bend should be reversed as much as possible. Aluminum sheets have rolling lines. The bending tool preferably intersects the rolling line at 90 degrees, which is not easy to crack.

8 types of aluminum alloys

1000 series

Representing 1050, 1060, 1070, and 1000 series aluminum plates, also known as pure aluminum plates, among all series, the 1000 series belongs to the series with the most aluminum content. The purity can reach more than 99.00%. Since it does not contain other technical elements, the production process is relatively simple and the price is relatively cheap. It is the most commonly used series in conventional industries. Most of the 1050 and 1060 series are currently in circulation. The 1000 series aluminum plate determines the minimum aluminum content of this series according to the last two Arabic numerals. For example, the last two Arabic numerals of the 1050 series are 50. According to the international brand naming principle, the aluminum content must reach more than 99.5% to be qualified products.

my country’s aluminum alloy technical standard (GB/T3880-2006) also clearly stipulates that the aluminum content of 1050 should reach 99.5%. For the same reason, the aluminum content of the 1060 series aluminum plate must reach more than 99.6%. Typical grades and uses of 1000 series: pure aluminum sheet 1060 is mainly used in applications requiring corrosion resistance and high formability, but for parts with low strength, such as chemical equipment, marine equipment, railway oil tankers, and electrical conductors materials, Instrumentation materials, welding rods, etc.

2000 series

Representing 2A16 (LY16), 2A06 (LY6) 2000 series aluminum plates are characterized by high hardness, among which the copper content is the highest, about 3-5%. 2A12 aluminum alloy is a kind of high-strength hard aluminum, which can be strengthened by heat treatment; 2A12 aluminum alloy has good spot welding weldability, and has a tendency to form intergranular cracks when gas welding and argon arc welding are used; 2A12 aluminum alloy can be cut after cold work hardening The performance is still good.

The corrosion resistance is not high, and anodizing treatment and painting methods are often used or the surface is coated with an aluminum layer to improve the corrosion resistance. 2000 series aluminum sheets belong to aviation aluminum materials, which are not often used in conventional industries. At present, there are few manufacturers producing 2000 series aluminum sheets in my country. The quality can not be compared with foreign countries. At present, imported aluminum sheets are mainly provided by South Korean and German manufacturers. With the development of my country’s aerospace industry, the production technology of 2000 series aluminum sheets will be further improved.

3000 series

On behalf of 3003, 3003, 3A21 mainly. It can also be called anti-rust aluminum alloys. my country’s 3000 series aluminum plate production technology is relatively excellent. 3000 series aluminum plate is mainly composed of manganese elements. The content is between 1.0-1.5. It is a series with a better anti-rust function. It is routinely used in humid environments such as air conditioners, refrigerators, and car bottoms. The price is higher than the 1000 series. It is a more commonly used alloy series.

Typical grades and uses of 3000 series

3003 aluminum is mainly used for processing parts that require good formability, high corrosion resistance, or good weldability, or workpieces that require both these properties and require higher strength than 1000 series alloys, such as transporting liquids. Tanks and tanks, pressure tanks, storage devices, heat exchangers, chemical equipment, aircraft fuel tanks, oil conduits, reflectors, kitchen equipment, washing machine cylinders, rivets, and welding wire. 3004 aluminum requires higher parts and components than 3003 alloy, chemical product production and storage devices, sheet metal processing parts, building baffles, cable pipes, sewers, and various lighting components.

4000 series

The aluminum plate represented by the 4A01, 4000 series belongs to the series with the higher silicon content. Usually, the silicon content is between 4.5-6.0%. It belongs to building materials, mechanical parts, forging materials, welding materials; low melting point, good corrosion resistance Product features: It has the characteristics of heat resistance and wear resistance.

5000 series

Represents the 5052.5005.5083.5A05 series. 5000 series aluminum plate belongs to the more commonly used alloy aluminum plate series, the main element is magnesium, and the magnesium content is between 3-5%. Also known as an aluminum-magnesium alloy. The main features are low density, high tensile strength, and high elongation. In the same area, the weight of aluminum-magnesium alloy is lower than that of other series. Therefore, it is often used in aviation, such as aircraft fuel tanks. It is also widely used in conventional industries. The processing technology is continuous casting and rolling, which belongs to the series of hot-rolled aluminum plates, so it can be deep-processed by oxidation.

In my country, the 5000 series aluminum plate belongs to one of the more mature aluminum plate series. Typical grades and uses of 5000 series: 5052 aluminum has good forming performance, corrosion resistance, weldability, fatigue strength, and moderate static strength. It is used to manufacture aircraft fuel tanks, oil pipes, and sheet metal parts for transportation vehicles and ships. , Instruments, street lamp brackets and rivet wires, etc.

6000 series

On behalf of 6061, it mainly contains two elements of magnesium and silicon, so it concentrates the advantages of the 4000 series and 5000 series. 6061 is a cold-treated aluminum forging product, which is suitable for applications with high requirements for corrosion resistance and oxidation resistance. Good usability, excellent interface characteristics, easy coating, and good workability.

Can be used on low voltage weapons and aircraft joints. General characteristics of 6061: excellent interface characteristics, easy coating, high strength, good usability, and strong corrosion resistance. Typical uses of 6061 aluminum: aircraft parts, camera parts, couplers, marine accessories and hardware, electronic accessories and joints, decorative or various hardware, hinge heads, magnetic heads, brake pistons, hydraulic pistons, electrical accessories, valves, and valve parts.

7000 series

Represents 7075, which mainly contains zinc. It also belongs to the aviation series. It is an aluminum-magnesium-zinc-copper alloy, a heat-treatable alloy, and a super-hard aluminum alloy with good wear resistance. The 7075 aluminum plate is stress relieved and will not deform or warp after processing. All super-large and super-thick 7075 aluminum plates are ultrasonically detected, which can ensure no blisters and impurities. 7075 aluminum plate has high thermal conductivity, which can shorten the forming time and improve work efficiency.

The main feature of 7075 is hardness. 7075 is a high-hardness, high-strength aluminum alloy, commonly used in the manufacture of aircraft structures and futures. It requires high-strength structural parts and mold manufacturing with high strength and strong corrosion resistance. At present, it basically relies on imports, and my country’s production technology needs to be improved.

8000 series

The more commonly used is 8011, which belongs to other series. In my memory, the main function of the aluminum plate is to make the bottle cap. It is also used in radiators, and most of the applications are aluminum foil. Less commonly used.

3 types of the best aluminum alloys for bending

Numerous metal alloying agents can be combined with aluminum to produce different aluminum alloys. The system for naming them uses four digits, with the first digit representing their chemical composition. We explain this in our article on aluminum alloy designations and tempers.

Generally speaking, aluminum alloys from the 1XXX, 3XXX, and 5XXX series demonstrate better bendability than other aluminum alloys. Some 6XXX series alloys are fairly bendable as well.

However, the different properties offered by each may make some more desirable than others. For example, 1XXX series aluminum generally has poor mechanical properties and is not suited to structural applications.

Now let’s discuss which alloys offer the best bendability and when you should use them.

Aluminum Alloy 3003

This alloy is primarily alloyed with manganese and is one of the most commonly used aluminum alloys for bending applications. It has excellent formability properties and does not require heat to be bent or molded.

Companies often make gutters, roofing, siding, chemical equipment, and storage tanks from 3003 aluminum.

Aluminum Alloy 5052

With magnesium as the primary alloying element, AA5052 demonstrates moderate-to-high strength characteristics. At the same time, it retains good bendability, and designers can use it for more intensive applications than AA3003. The corrosion resistance of this alloy is also excellent against seawater, meaning it is excellent for applications in marine equipment.

Manufacturers often produce hydraulic tubes, traffic and hardware signs, medical equipment, marine equipment, and electronics (chassis and enclosures).

Aluminum Alloy 6061

You will find this is an extremely common alloy in your day-to-day life. Even though it is not as bendable or formable as the two alloys above, it is the strongest among all three. It has magnesium and silicon as alloying elements, and you can further enhance its strength with heat treatment.

Alloy 6061 is widely referred to as “structural aluminum” because it is so commonly used in structural (construction) applications. Nevertheless, due to its outstanding properties, it is also used in food and beverage containers, ladders, aircraft and automotive parts, scuba tanks, bicycle frames, and more.

Why Are These 3 Alloys Important?

Despite their different properties, these alloys are excellent examples of bendability in aluminum alloys. They demonstrate that even though some aluminum alloys feature better formability and percent elongation for a given bend radius and thickness, they each serve a unique purpose and a wide variety of applications.

Even with slightly lower bendability, the strength of alloy 6061 makes it one of the most widely used aluminum alloys. In the same way, alloy 3003 has multiple uses in applications that require superior bendability. Meanwhile, alloy 5052 is commonly used thanks to its balance in terms of bendability and strength.

Resource: Gabrian