Designation: A – 90b (Reapproved ). Standard carbon steel bars, hot rolled 1 in. diameter by 10 ft, ASTM A dated ___. SAE According to standards. ASTM A b Hot Rolled. Number. ASTM A /AM: Cold-drawn. Equivalent. USA AISI/SAE. Italy UNI. (ASTM) (Continued) ASTM A51 1 () ASTM A51 () ASTM A51 3 (a) ASTM A/AM () ASTM A () ASTM Ab.

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SBQ steels are used for wind turbine components, bearings and seamless tubes. You may delete a document from your Alert Profile at any time. These steels are produced both in cut lengths 900b coils.

Special Bar Quality steels

Standards Subsctiption may be the perfect solution. Special quality bar applications include forging, heat treating, cold drawing, machining, and many structural uses. SBQ steels are used in safety critical applications. These steels have superior mechanical properties and defect free surface.

Quality SAE Chemical composition Temperature °C

Your Alert Profile lists the documents that will be monitored. ASTM standard A b covers specification for plain carbon special quality bar steels for applications which includes forging, heat treating, cold drawing, machining and many structural uses.

Please first verify your email before subscribing to alerts. Most producers see ties to the automotive industry as the key drivers of the SBQ astn grades.

Although there is no single definition, special bar quality steel can be defined as steel that moves rotates, twists or bends rather than stays still whilst in use. Similar is the case of resulfurized and rephosphorized steels. Some end uses of these steels may require superior surface quality, or special chemical restrictions, metallurgical characteristics, heat treatment or surface finishes.

These steels are produced with more precise dimensions and chemistry. In the hand tools sector, they are used for hammers, screwdrivers and wrenches, among others. X576 first log in with a verified email before subscribing to alerts. This makes the production route of these steels a bit complex. Internal metallurgical quality and consistency is also achieved by a meaningful reduction during the rolling process.


If the document is revised or amended, you will be notified by email. Ast cleanliness can be achieved through the integrated route or through an additional refining step and cleaner iron bearing inputs into an EAF in a mini mill. As the voice of the U. Need more than one copy? Add to Alert PDF. SBQ steels are at the higher aztm of the quality spectrum in both metallurgical consistency a56 dimensional accuracy. The main application area for special aastm quality steels is the automotive industry for engine, transmission, steering, suspension and hydraulic components Fig 1.

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The specification of SBQ steels may range from plain carbon and carbon manganese steels to alloy and stainless steels containing different percentages of aluminum, nickel, chrome and other alloying elements. Proceed to Checkout Continue Shopping. Sulphur content in the 15 grades of the resulfurized steels also have different ranges of sulfur with a minimum of 0.

Leave a Reply Cancel reply Your w576 address will not be published. Special bar quality steel may have products of shapes which can be classified into round, square and hexagonal bars. Both these terms refer to steel types as well as to bar products, and as they are often associated with the steel grades, they refer qstm billet and slab as well as bar. Hot-wrought special asym carbon ast, bars are produced in cut lengths and coils; the manufacturer should be consulted astn sections and sizes available in coils, produced to a chemical composition.

In order to achieve metallurgical quality, the steel has to be particularly clean. Donate Grateful for your donation! Your email address will not be published. Posted by Satyendra on May 27, in Ispat Digest 0 comments. Subscription pricing is determined by: This standard is also available to be included in Standards Subscriptions. These steels may have many grades. You can download and open this file to your own computer but DRM prevents opening this file on another computer, including a networked server.


The products may also include hot rolled steel bars, cold finished steel bars. The term is used to describe steel long products for more demanding processing or end-use applications which cannot be met by merchant quality grades.

We have no amendments a76 corrections for this standard.

The petroleum industry uses them to produce valves and pipeline couplings for oil extraction. Special bar quality SBQ steels represents ast, wide variety of higher quality carbon and alloy steels. Already Subscribed to this document. The range of carbon content in these steels varies from grade to grade with minimum of 0. Designed by Elegant Themes Powered by WordPress.

SBQ steels are used for bolts, springs, cable wires, chains, tyre beads and many similar applications in automotive industry. This specification has got 53 grades under the category of non-resulfurized steels, 15 grades under the category of resulfurized steels and 5 grades under rephosphorized and resulfurized category. A guide for the selection of steel bars is contained in Practice A The internal quality of these steels is very asmt since machining and bending activities are involved during the processing of these steels in subsequent stages.

These steels are generally machined, forged or cold drawn during subsequent processing. The chemistry of these steels is more complex than merchant quality steels. These steels are also used for a wide range of industrial applications.