ASTM A909-03

Standard Specification for Steel Forgings, Microalloy, for General Industrial Use

SCOPE
1.1 This specification covers wrought, microalloyed carbon steel forgings for industrial use. Microalloyed steels develop their properties by the addition of small amounts of microalloying elements such as vanadium, columbium, titanium, or molybdenum. The properties may be influenced also by control of the hot working process and temperature and by control of the subsequent cooling rate.
1.2 The forgings shall be furnished to chemical composition and mechanical property requirements as specified herein. Chemical composition is based on standard carbon steel grades modified to include microalloying elements. Strength level is specified based on desired mechanical properties in the forgings. Depending on the forging process, different strength classes may be attainable from a single chemical composition. Conversely, mechanical properties of a given strength class may be achieved using different chemical compositions. The manufacturer should be consulted if development of chemical composition is necessary.
1.3 For the purpose of this specification, forgings with maximum section thickness of 4 in. (102 mm) are to be considered.
1.4 Supplementary Requirements S1 to S8 are provided for use when additional controls or requirements are desired. These shall apply only when specified on the purchase order.
1.5 The values stated in either inch-pound units or SI (metric) 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 this specification.
1.6 Unless the order specifies the applicable "M" specification designation, the material shall be furnished to the inch-pound units.

General Information

• Status: Historical
• Publication Date: 09-Sep-2003
• ICS: 77.140.85 - Iron and steel forgings
• Technical Committee: A01 - Steel, Stainless Steel and Related Alloys
• Drafting Committee: A01.06 - Steel Forgings and Billets

Relations

• Replaces: ASTM A909-94(1999) - Standard Specification for Steel Forgings, Microalloy, for General Industrial Use
• Effective Date: 10-Sep-2003
• Replaced By: ASTM A909/A909M-06 - Standard Specification for Steel Forgings, Microalloy, for General Industrial Use
• Effective Date: 01-Dec-2006

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation: A909 – 03
Standard Specification for
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Steel Forgings, Microalloy, for General Industrial Use
This standard is issued under the fixed designation A909; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope* 2. Referenced Documents
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1.1 This specification covers wrought, microalloyed carbon 2.1 ASTM Standards:
steel forgings for industrial use. Microalloyed steels develop A29/A29M Specification for Steel Bars, Carbon and Alloy,
their properties by the addition of small amounts of microal- Hot-Wrought, General Requirements for
loying elements such as vanadium, columbium, titanium, or A275/A275M Practice for Magnetic Particle Examination
molybdenum.Thepropertiesmaybeinfluencedalsobycontrol of Steel Forgings
of the hot working process and temperature and by control of A370 Test Methods and Definitions for Mechanical Testing
the subsequent cooling rate. of Steel Products
1.2 The forgings shall be furnished to chemical composition A576 Specification for Steel Bars, Carbon, Hot-Wrought,
and mechanical property requirements as specified herein. Special Quality
Chemical composition is based on standard carbon steel grades A751 Test Methods, Practices, andTerminology for Chemi-
modified to include microalloying elements. Strength level is cal Analysis of Steel Products
specified based on desired mechanical properties in the forg- A788/A788M Specification for Steel Forgings, General Re-
ings. Depending on the forging process, different strength quirements
classes may be attainable from a single chemical composition. A921/A921M SpecificationforSteelBars,Microalloy,Hot-
Conversely, mechanical properties of a given strength class Wrought, Special Quality, for Subsequent Hot Forging
may be achieved using different chemical compositions. The E10 Test Method for Brinell Hardness of Metallic Materials
manufacturer should be consulted if development of chemical E18 Test Methods for Rockwell Hardness of Metallic Ma-
composition is necessary. terials
1.3 For the purpose of this specification, forgings with E45 Test Methods for Determining the Inclusion Content of
maximum section thickness of 4 in. (102 mm) are to be Steel
considered.
3. Terminology
1.4 Supplementary Requirements S1 to S8 are provided for
3.1 Definitions of Terms Specific to This Standard:
use when additional controls or requirements are desired.
These shall apply only when specified on the purchase order. 3.1.1 microalloy forgings—forgings from microalloyed
steels produced by effectively controlling the thermomechani-
1.5 The values stated in either inch-pound units or SI
(metric) units are to be regarded separately as standard. Within cal components of the forging process to achieve required
mechanical properties with no post-forging heat treatment.
the text and tables, SI units are shown in brackets. The values
stated in each system are not exact equivalents; therefore, each 3.1.2 microalloy forging procedure—the written thermo-
mechanical processing parameters to be followed during the
system must be used independently of the other. Combining
values from the two systems may result in nonconformance production of a microalloy forging. It would include, but is not
limited to: starting stock size; chemical composition, including
with this specification.
1.6 Unless the order specifies the applicable “M” specifica- any optional microalloying additions; reheat practice; forging
temperature range; method of heating; cooling methods; and
tion designation, the material shall be furnished to the inch-
pound units. lot size definition.
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This specification is under the jurisdiction of ASTM Committee A01 on Steel,
Stainless Steel and Related Alloys and is the direct responsibility of Subcommittee
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A01.06 on Steel Forgings and Billets. For referenced ASTM standards, visit the ASTM website, www.astm.org, or
Current edition approved Sept. 10, 2003. October 2003 Originally published in contact ASTM Customer Service at [e-mail]. For Annual Book ofASTM
1992. Last previous edition approved in 1999 as A909 – 94 (1999). DOI: 10.1520/ Standards volume information, refer to the standard’s Document Summary page on
A0909-03. the ASTM website.
*A Summary of Changes section appears at the end of this standard.
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A909 – 03
4. Ordering Information 6.2 Silicon analysis shall be 0.15/0.35 %. Silicon content up
to 0.80 % maximum may be furnished by agreement between
4.1 Orders for material supplied to t
...