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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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Sulphur content in the 15 grades of the resulfurized steels also have different ranges of sulfur with a minimum of 0. A guide for the selection of steel bars is contained in Practice A SBQ steels are used for bolts, springs, cable wires, chains, tyre beads and many similar applications in automotive industry.

Donate Grateful for your donation! Standards Subscriptions from ANSI provides a money-saving, multi-user solution for accessing standards. These steels are also used for a wide range of industrial 90. 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.

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Quality SAE 1018 Chemical composition Temperature °C

SBQ steels are used for wind turbine components, bearings and seamless tubes. Designed by Elegant Themes Powered by WordPress. The products may also include hot rolled steel bars, cold finished steel bars.


SBQ steels are at the higher end of the quality spectrum in both metallurgical consistency and dimensional accuracy. Fig 1 Some of the uses of SBQ steels in automotive industry. Posted by Satyendra on May 27, in Asttm Digest 0 comments. The main application area for special bar quality steels is the automotive industry for engine, transmission, steering, suspension and hydraulic components Fig 1.

In the hand tools sector, they are used for hammers, screwdrivers and wrenches, among others. These steels have superior mechanical properties and defect free surface. The asrm of carbon content in these steels varies from grade a5576 grade with minimum of 0.

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ASTM Ab() – Standard Specification for Steel Bars, Carbon, Hot-Wrought, Special Quality

These steels are produced both in cut lengths and coils. Need more than one copy? Steel cleanliness can be achieved through the integrated route or through an additional aetm step and cleaner iron bearing inputs into an EAF in a mini mill.

Add to Alert PDF. Similar is the case of resulfurized and rephosphorized steels. These steels are generally machined, forged or cold drawn during subsequent processing. Most producers see ties to the automotive industry as the key drivers of the SBQ steel grades.

Special bar quality steel may have products of shapes which can be classified into round, square and hexagonal bars.

Proceed to Checkout Continue Shopping. 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. Internal metallurgical quality and consistency is also achieved by a meaningful reduction during the rolling process. These steels are produced with a5776 precise dimensions and chemistry.


The petroleum industry uses them to produce valves and pipeline couplings for oil extraction. s576

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. 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.

ASTM standard A sstm covers specification for plain carbon special quality bar steels for applications which includes forging, heat treating, cold drawing, machining and many structural uses. This makes the production route of these steels a bit complex.

We have no amendments or corrections for this standard. Please first log in with a verified email before subscribing to asfm. Special quality bar applications include forging, heat treating, cold drawing, machining, and many structural uses. Subscription pricing is determined by: 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. 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.