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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In order to achieve metallurgical quality, the steel has w576 be particularly clean. Similar is the case of resulfurized and rephosphorized steels.

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Standards Subsctiption may be the perfect solution. The main application area for special bar quality steels is the automotive industry for engine, transmission, steering, suspension and hydraulic components Fig 1. These steels may have many grades. The chemistry of these steels is more complex than merchant quality steels.

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This standard is not included in any packages. These steels have superior mechanical properties and defect free surface. Special quality a5776 applications include forging, heat treating, cold drawing, machining, and many structural uses.

Some end uses of these steels may require superior surface quality, or special chemical restrictions, metallurgical characteristics, heat treatment or surface finishes.

Special Bar Quality steels

Leave a Reply Cancel reply Your email address will not be published. The internal quality of these steels is very important since machining 90v bending activities are involved during the processing of these steels in subsequent stages.


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Standards Subscriptions from ANSI provides a money-saving, multi-user solution for accessing standards. These steels are generally a56, forged or cold drawn during subsequent processing. Add to Alert PDF. The petroleum industry uses them to produce valves and pipeline couplings for oil extraction. A guide for the selection of steel bars is contained in Practice A Your email address will not be published.

Posted by Satyendra on May 27, in Ispat Digest 0 comments. If the document is revised or amended, you will be notified by email. Although there is no single definition, special bar quality steel can be defined as steel a56 moves rotates, twists or bends rather than stays still whilst in use.

These steels are also used for a wide range of industrial applications. The range of carbon content in these steels varies from grade to grade with minimum of 0. Most producers see ties to the automotive industry as the key drivers of the SBQ steel grades.

Sulphur content in the 15 grades of the resulfurized steels also have different ranges of sulfur with a minimum of 0. Your Alert Profile lists the documents that will be monitored. These steels are produced both in cut lengths and coils. The products may also include hot rolled steel bars, cold finished steel bars.

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.

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.


Subscription pricing is determined by: SBQ steels are at the higher end of the quality spectrum in both metallurgical consistency and dimensional accuracy. Both satm 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.

Please first verify your email before subscribing to alerts. Donate Grateful for your donation! SBQ steels are used in safety critical applications.

SBQ steels are used for bolts, springs, cable wires, chains, tyre beads and many similar applications in automotive industry.

In the hand tools sector, they are used for hammers, a756 and wrenches, among others. Please first log in with a verified email before subscribing to alerts. Proceed to Checkout Continue Shopping. Need more than one copy? These steels are produced with more precise dimensions and chemistry.


We have no amendments or corrections for this standard. Fig 1 Some of the uses of SBQ steels in automotive industry. 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.

Steel 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. 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.