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ASTM A 921/A921M : 1993 : R2016

Superseded
Superseded

A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.

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superseded

A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.

Standard Specification for Steel Bars, Microalloy, Hot-Wrought, Special Quality, for Subsequent Hot Forging
Available format(s)

Hardcopy , PDF

Superseded date

29-04-2022

Language(s)

English

Published date

07-09-2016

Publisher

American Society for Testing and Materials

CONTAINED IN VOL. 01.05, 2017 Defines hot-wrought, special quality microalloyed carbon steel bars intended for use as hot forging stock.

1.1This specification covers hot-wrought, special quality microalloyed carbon steel bars intended for use as hot forging stock. The bars shall be hot-wrought, as-wrought, unless thermal treatment is necessary to ensure cold shearability.

1.2The bars shall be furnished to chemical composition only. Chemical composition is based on standard carbon steel grades modified to include microalloying elements such as columbium (niobium), vanadium, or molybdenum. Desired mechanical properties are developed in the subsequent hot forging and controlled cooling operations.

1.3Sections and sizes of bar steel available are covered in Specification A29/A29M.

1.4Supplementary Requirements S1 to S6 are provided for use when additional controls or requirements are desired. These shall apply only when specified on the purchase order.

1.5The values stated in either inch-pound units or SI units are to be regarded separately as standard. Within the text and tables, SI units are shown in brackets. The values stated in each system are not exact equivalents; therefore, each system must be used independently of the other. Combining values from the two systems may result in nonconformance with the specification.

1.6Unless the order specifies the applicable “M” specification designation, the material shall be furnished to the inch-pound units.

Committee
A 01
DocumentType
Standard
Pages
3
ProductNote
Reconfirmed 2016
PublisherName
American Society for Testing and Materials
Status
Superseded
SupersededBy
Supersedes

ASTM A 909/A909M : 2006 : R2021 Standard Specification for Steel Forgings, Microalloy, for General Industrial Use

ASTM E 45 : 1997 : EDT 2 Standard Test Methods for Determining the Inclusion Content of Steel
ASTM A 788/A788M : 2022 Standard Specification for Steel Forgings, General Requirements
ASTM A 29/A29M : 2016 : REDLINE Standard Specification for General Requirements for Steel Bars, Carbon and Alloy, Hot-Wrought
ASTM A 788/A788M : 2019 : REV A Standard Specification for Steel Forgings, General Requirements

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