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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These steels are also used for a wide range of industrial applications. This standard is not included in any packages. 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.

A guide for the selection of steel bars is contained in Practice A Standards Subsctiption may be the perfect solution. This standard is also available to be included in Standards Subscriptions. SBQ steels are used for bolts, springs, cable wires, chains, tyre beads and many similar applications in automotive industry.

We have no amendments or corrections for this standard. If the document is revised or amended, you will be notified by email. The range of carbon content in these steels varies from grade to grade with minimum of 0. Special bar quality steel may have products of shapes which can be classified into round, square and hexagonal bars.

Already Subscribed to this document. Fig 1 Some of the uses of SBQ steels in automotive industry. Your email address w576 not be published. SBQ steels are used in safety critical applications. Standards Subscriptions from ANSI provides a money-saving, multi-user solution for accessing standards.


This makes the production route of these steels a bit complex.

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. 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.

These steels are produced both in cut lengths and coils. Leave a Reply Cancel reply Your email address will not be published. Please first verify your email before subscribing to alerts. 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. The petroleum industry uses them to produce valves and pipeline couplings for oil extraction.

These steels are generally machined, forged or cold drawn during subsequent processing.

Quality SAE Chemical composition Temperature °C

These steels may have many grades. SBQ steels are used for wind turbine components, bearings and seamless tubes. Similar is the case of resulfurized and rephosphorized steels. 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. SBQ steels are at the higher end of the quality spectrum in both metallurgical consistency and dimensional accuracy.

The chemistry of these steels is more complex than merchant quality steels.

Sulphur content in the 15 grades of the resulfurized steels also have different ranges of sulfur with a minimum of 0. Special bar quality SBQ steels represents a wide variety of higher quality carbon and alloy steels.

Special Bar Quality steels

Your Alert Profile lists the documents that will be monitored. Special quality bar applications include forging, heat treating, cold drawing, machining, and many structural uses. This specification has got 53 grades under the category of non-resulfurized steels, 15 grades under the category of resulfurized aastm and 5 grades under rephosphorized and resulfurized category. Some end uses of these steels may require superior surface quality, or special chemical restrictions, metallurgical characteristics, heat treatment or surface finishes.

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These steels have superior mechanical properties and defect free surface.

The products may also include hot rolled steel bars, cold finished steel bars. The main application area for special bar quality steels is the automotive industry for engine, transmission, steering, suspension and hydraulic components Fig 1. Internal metallurgical quality and consistency is also achieved by a z576 reduction during the rolling process.

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

Special Bar Quality steels |

Donate Grateful for your donation! As the voice of the U. Subscription pricing is determined by: 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.

In order to achieve metallurgical quality, the steel astn to be particularly clean. Add to Alert PDF. These steels are produced with more precise dimensions and chemistry.