What grade is aluminum flat bar?

14 Apr.,2024

 

Ratio of strength to mass for a material

The specific strength is a material's (or muscle's) strength (force per unit area at failure) divided by its density. It is also known as the strength-to-weight ratio or strength/weight ratio or strength-to-mass ratio. In fiber or textile applications, tenacity is the usual measure of specific strength. The SI unit for specific strength is Pa⋅m3/kg, or N⋅m/kg, which is dimensionally equivalent to m2/s2, though the latter form is rarely used. Specific strength has the same units as specific energy, and is related to the maximum specific energy of rotation that an object can have without flying apart due to centrifugal force.

Another way to describe specific strength is breaking length, also known as self support length: the maximum length of a vertical column of the material (assuming a fixed cross-section) that could suspend its own weight when supported only at the top. For this measurement, the definition of weight is the force of gravity at the Earth's surface (standard gravity, 9.80665 m/s2) applying to the entire length of the material, not diminishing with height. This usage is more common with certain specialty fiber or textile applications.

The materials with the highest specific strengths are typically fibers such as carbon fiber, glass fiber and various polymers, and these are frequently used to make composite materials (e.g. carbon fiber-epoxy). These materials and others such as titanium, aluminium, magnesium and high strength steel alloys are widely used in aerospace and other applications where weight savings are worth the higher material cost.

Note that strength and stiffness are distinct. Both are important in design of efficient and safe structures.

Calculations of breaking length

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L = T s / ρ g {\displaystyle L={\frac {T_{s}/\rho }{\mathbf {g} }}}

where L {\displaystyle L} is the length, T s {\displaystyle T_{s}} is the tensile strength, ρ {\displaystyle \rho } is the density and g {\displaystyle \mathbf {g} } is the acceleration due to gravity ( ≈ 9.8 {\displaystyle \approx 9.8} m/s 2 {\displaystyle ^{2}} )

Examples

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The data of this table is from best cases, and has been established for giving a rough figure.

Note: Multiwalled carbon nanotubes have the highest tensile strength of any material yet measured, with labs producing them at a tensile strength of 63 GPa,[36] still well below their theoretical limit of 300 GPa. The first nanotube ropes (20 mm long) whose tensile strength was published (in 2000) had a strength of 3.6 GPa, still well below their theoretical limit.[41] The density is different depending on the manufacturing method, and the lowest value is 0.037 or 0.55 (solid).[37]

The 'Yuri' and space tethers

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The International Space Elevator Consortium uses the "Yuri" as a name for the SI units describing specific strength. Specific strength is of fundamental importance in the description of space elevator cable materials. One Yuri is conceived to be the SI unit for yield stress (or breaking stress) per unit of density of a material under tension. One Yuri equals 1 Pa⋅m3/kg or 1 N⋅m/kg, which is the breaking/yielding force per linear density of the cable under tension.[42][43] A functional Earth space elevator would require a tether of 30–80 megaYuri (corresponding to 3100–8200 km of breaking length).[44]

Fundamental limit on specific strength

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The null energy condition places a fundamental limit on the specific strength of any material.[40] The specific strength is bounded to be no greater than c2 ~ 9×1013 kN⋅m/kg, where c is the speed of light. This limit is achieved by electric and magnetic field lines, QCD flux tubes, and the fundamental strings hypothesized by string theory.[citation needed]

Tenacity (textile strength)

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Tenacity is the customary measure of strength of a fiber or yarn. It is usually defined as the ultimate (breaking) force of the fiber (in gram-force units) divided by the denier. Because denier is a measure of the linear density, the tenacity works out to be not a measure of force per unit area, but rather a quasi-dimensionless measure analogous to specific strength.[45] A tenacity of 1 {\displaystyle 1} corresponds to:[citation needed] 1 g ⋅ 9.80665 m s − 2 1 g / 9000 m = 9.80665 m s − 2 1 / 9000 m = 9.80665 m s − 2 9000 m = 88259.85 m 2 s − 2 {\displaystyle {\frac {1{\rm {\,g}}\cdot 9.80665{\rm {\,ms^{-2}}}}{1{\rm {\,g}}/9000{\rm {\,m}}}}={\frac {9.80665{\rm {\,ms^{-2}}}}{1/9000{\rm {\,m}}}}=9.80665{\rm {\,ms^{-2}}}\,9000{\rm {\,m}}=88259.85{\rm {\,m^{2}s^{-2}}}} Mostly Tenacity expressed in report as cN/tex.

See also

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References

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  • Specific stiffness - Specific strength chart, University of Cambridge, Department of Engineering

Alro stocks aluminum in a variety of shapes including flat, hex, round bar and square bar. The most popular aluminum grades of bars are 2011, 2024, 6061 and 7075.  Aluminum bars can be used in various applications due to their unbeatable strength to weight ratio compared to other metals.

Available Shapes and Grades of Aluminum Bar Stock

Alro Steel offers a variety of shapes and grades of aluminum bars to meet your application needs. We stock aluminum sheet and plate, as well as a wide variety of aluminum extruded and aluminum cold-finished bars in:

  • Round
  • Square
  • Hex
  • Flats

We stock a range of aluminum bar grades including

2011 Cold Finished Bar: often used for screw machine parts because of its free machining elements.

2024 Cold Finished Bar: the most widely used aerospace alloy. With the combination of high yield strength and good fatigue resistance. Also has good machinability and grain structure. Great for precision fittings and parts.

6061 Extruded Aluminum Bar: ideal for applications involving welding or brazing because if its high corrosion resistance in all temperatures, as well as its excellent corrosion resistance from its high chromium content.

6063 Extruded Aluminum Bar: has overall good mechanical properties. It is often used for relatively intricate work. It has a good surface finished and it can be anodized.

6061 Cold Finished Bar: available in flat, hex, round, and square shapes, this material is one of the most popular aluminum grades available. It offers high corrosion resistance and excellent performance, even in high heat.

7075 Cold Finished Bar: the highest strength aluminum bar that Alro stocks. 7075 grade can be used in air-frame structures and aircraft parts.

How Aluminum Bars Are Made

One of the common ways that aluminum bar is manufactured is through the process of extrusion. In extrusion, aluminum bar is made by pushing the material through a die that is under pressure. As the aluminum is pushed through under pressure, the desired shape, whether that be a rod, bar, or aluminum tube is made.

The extruded aluminum shapes are cooled and other processes including stretching, milling and cutting are used to create the final product. Extruding aluminum shapes is a very cost-effective process because it generally requires less production time than other ways of making aluminum bar. Other processes for creating bars include rolling, or molten aluminum being cast in a mold.

What Is the Difference Between Rod and Bar?

Aluminum rod and bar are made using the same processes. Aluminum Rod refers to round or circular shapes. Bar refers to square, rectangular, flat or hexagon (also call hex in the metals industry).

Uses for Aluminum Bar Shapes

Aluminum is non-toxic and can be used in food preparation equipment. Aluminum's reflective nature is suitable for light fixtures, is non-combustible and so does not burn. Some end uses include transportation, food packaging, furniture, electrical applications, building, construction, machinery and equipment.
Aluminum bar can be used for a variety of applications, including:
  • Medical assembly
  • Aircraft construction
  • Structural components
  • Commercial transportation
  • Electrical Components

Contact Alro Steel Today to Learn More

We are your one stop shop for metal products that meet any of your application needs. We offer a variety and quantity of materials that are unmatched by anyone else in the industry. To learn more about our aluminum or other products,

Aluminum is non-toxic and can be used in food preparation equipment. Aluminum's reflective nature is suitable for light fixtures, is non-combustible and so does not burn. Some end uses include transportation, food packaging, furniture, electrical applications, building, construction, machinery and equipment.Aluminum bar can be used for a variety of applications, including:We are your one stop shop for metal products that meet any of your application needs. We offer a variety and quantity of materials that are unmatched by anyone else in the industry. To learn more about our aluminum or other products, contact us today.

What grade is aluminum flat bar?

Aluminum Bar - Flat, Hex, Round, Square