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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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Asym makes the production route of these steels a bit wstm. Special quality bar applications include forging, heat treating, cold drawing, machining, and many structural uses. We have no amendments or corrections for this standard. Proceed to Checkout Continue Shopping. The products may also include hot rolled steel bars, cold finished steel bars. You can download and open this file to your own computer but DRM prevents opening this file on another computer, including a networked server.

This standard is also available to be included in Standards Subscriptions. The petroleum industry uses them to produce valves and pipeline couplings for oil extraction.

As the voice of the U. 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 to billet and slab as well as bar. If the document is revised or amended, you will sstm notified by email.


Pipe billet

SBQ steels are used for bolts, springs, cable wires, chains, tyre beads and many similar applications in automotive industry. Standards Subscriptions from ANSI provides a money-saving, multi-user solution for accessing standards. 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.

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. These steels are produced with more precise dimensions and chemistry. The range of carbon content in these steels varies from grade to grade with minimum of 0.

Similar is the case of resulfurized and rephosphorized steels. This standard is not included in any packages. Already Subscribed to this document.

Special Bar Quality steels

Fig 1 Some of the uses of SBQ steels in automotive industry. The chemistry of these steels is more complex than asstm quality steels.

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. Hot-wrought special quality carbon steel bars are produced in cut lengths and coils; the manufacturer should be consulted regarding sections and sizes available in coils, produced to a chemical composition.

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SBQ steels are at the higher end of the quality spectrum in both metallurgical consistency and dimensional accuracy. Posted by Satyendra on May 27, in Ispat Digest 0 comments. Sulphur content in the 15 grades of the resulfurized steels also have different ranges of sulfur with a minimum of 0. Internal metallurgical quality and consistency is also achieved by a meaningful reduction during the rolling process.


Some end uses of these steels may require superior surface quality, astk special chemical restrictions, metallurgical characteristics, heat treatment or surface finishes. These steels have superior mechanical properties and defect free surface. These steels are also used for a wide range of industrial applications.

In the hand tools sector, they are used for hammers, screwdrivers and wrenches, among others.

Subscription pricing is determined by: Need more than one copy? These steels are produced both in cut lengths and coils. Your Alert Profile lists the documents that will be monitored. 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.

The internal quality of these steels is very important 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. SBQ steels are used for wind turbine components, bearings and seamless tubes.

Special bar quality SBQ steels represents a wide variety of higher quality carbon and alloy steels.