ASTM A322-13
(Specification)Standard Specification for Steel Bars, Alloy, Standard Grades
Standard Specification for Steel Bars, Alloy, Standard Grades
ABSTRACT
This specification covers hot-wrought alloy steel bars. The steel shall be made by one or more of the following primary processes: open-hearth, basic-oxygen, or electric-furnace. The primary melting may incorporate separate degassing or refining and may be followed by secondary melting using electro-slag remelting or vacuum arc remelting. Where secondary remelting is employed, the heat shall be defined as all of the cast product remelted from a single primary heat. The steel shall be furnished as strand cast or ingot cast. Immediately after hot forming, the bars shall be allowed to cool to a temperature below the critical range under suitable conditions to prevent imperfections caused by too rapid cooling. The bars shall be free of pipe, cracks, and flakes. Within the limits of good manufacturing and inspection practices, the bars shall be free of injurious seams, laps, segregation, or other imperfections which are due to their nature, degree, or extent, will interfere with the use of the material in machining or fabrication of suitable parts.
SCOPE
1.1 This specification covers hot-wrought alloy steel bars. Bar applications include forging, heat treating, cold drawing, machining and many structural components (Note 1). Note 1—A guide for the selection of steel bars is contained in Practice A400.
1.2 The bars shall be furnished in the grades specified in Table 1. Sections and sizes of bar steel available are covered in Specification A29/A29M. Hot-wrought alloy 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.
1.3 Some applications may require superior surface quality, or special chemical restrictions, metallurgical characteristics, heat treatment, or surface finishes which the purchaser may obtain by designating one or more of the available Supplementary Requirements.
General Information
Relations
Buy Standard
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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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:A322 −13
Standard Specification for
1
Steel Bars, Alloy, Standard Grades
This standard is issued under the fixed designation A322; 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.
This standard has been approved for use by agencies of the U.S. Department of Defense.
1. Scope 3. Ordering Information
1.1 This specification covers hot-wrought alloy steel bars. 3.1 Orders under this specification should include the fol-
Bar applications include forging, heat treating, cold drawing, lowing as required to describe adequately the desired material:
machining and many structural components (Note 1). 3.1.1 Quantity (weight or number of bars),
3.1.2 Name of material (hot-wrought alloy steel bars),
NOTE 1—Aguide for the selection of steel bars is contained in Practice
3.1.3 Dimensions,
A400.
3.1.4 ASTM designation,
1.2 The bars shall be furnished in the grades specified in
3.1.5 Deoxidation practice (see 5.3),
Table 1. Sections and sizes of bar steel available are covered in
3.1.6 Gradedesignationorchemicalcompositionlimits(see
Specification A29/A29M. Hot-wrought alloy steel bars are
6.1 and Table 1),
produced in cut lengths and coils; the manufacturer should be
3.1.7 Grain size if required,
consulted regarding sections and sizes available in coils,
3.1.8 Test reports, if required (Section 8),
produced to a chemical composition.
3.1.9 Additions to the specification and Supplementary
1.3 Some applications may require superior surface quality,
Requirements, if required, and
or special chemical restrictions, metallurgical characteristics,
3.1.10 Application.
heat treatment, or surface finishes which the purchaser may
obtain by designating one or more of the available Supplemen-
4. General Requirements
tary Requirements.
4.1 Material furnished under this specification shall con-
form to the applicable requirements of the current edition of
2. Referenced Documents
Specification A29/A29M, unless otherwise provided herein.
2
2.1 ASTM Standards:
A29/A29M SpecificationforGeneralRequirementsforSteel 5. Materials and Manufacture
Bars, Carbon and Alloy, Hot-Wrought
5.1 The steel shall be made by one or more of the following
A304 Specification for Carbon andAlloy Steel Bars Subject
primary processes: basic-oxygen or electric-furnace. The pri-
to End-Quench Hardenability Requirements
mary melting may incorporate separate degassing or refining
A400 Practice for Steel Bars, Selection Guide, Composition,
and may be followed by secondary melting using electro-slag
and Mechanical Properties
remelting or vacuum arc remelting. Where secondary melting
E112 Test Methods for Determining Average Grain Size
is employed, the heat shall be defined as all of the cast product
E381 Method of Macroetch Testing Steel Bars, Billets,
remelted from a single primary heat.
Blooms, and Forgings
5.2 The steel shall be furnished as strand cast or ingot cast,
E527 Practice for Numbering Metals and Alloys in the
unless otherwise specified.
Unified Numbering System (UNS)
5.2.1 Discard—A sufficient discard shall be made to secure
freedom from injurious piping and undue segregation.
5.3 Deoxidation—Killed steel is required.
1
This specification is under the jurisdiction ofASTM Committee A01 on Steel,
5.3.1 The purchaser may designate that the steel be made to
Stainless Steel and Related Alloys and is the direct responsibility of Subcommittee
A01.15 on Bars.
coarse or fine austenitic grain size. (See Supplementary Re-
Current edition approved May 1, 2013. Published June 2013. Originally
quirement S9 or S10.)
approved in 1947. Last previous edition approved in 2007 as A322 – 07. DOI:
10.1520/A0322-13.
5.4 Slow Cooling—Immediately after hot forming, the bars
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
shall be allowed to cool to a temperature below the critical
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
range under suitable conditions to prevent imperfections
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. caused by too rapid cooling.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1
---------------------- Page: 1 ----------------------
A322−13
A,B
TABLE 1 Grade Designations and Chemical Compositions of Hot-Wrought Alloy Steel Bars
D
UNS Grade Chemical Composition, Ranges and Limits, %
C
Designations
Designation E F
Carbon Manganese Phosphorus, Sulfur, Silicon Nickel Chromium Molybdenum
max
max
G13300 1330 0.28–0.33 1.60–1.90 0.035 0.040 0.15–0.35 . . .
G13350 1335 0.33–0.38 1.6
...
This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation: A322 − 07 A322 − 13
Standard Specification for
1
Steel Bars, Alloy, Standard Grades
This standard is issued under the fixed designation A322; 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.
This standard has been approved for use by agencies of the Department of Defense.
1. Scope*Scope
1.1 This specification covers hot-wrought alloy steel bars. Bar applications include forging, heat treating, cold drawing,
machining and many structural components (Note 1).
NOTE 1—A guide for the selection of steel bars is contained in Practice A400.
1.2 The bars shall be furnished in the grades specified in Table 1. Sections and sizes of bar steel available are covered in
Specification A29/A29M. Hot-wrought alloy 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.
1.3 Some applications may require superior surface quality, or special chemical restrictions, metallurgical characteristics, heat
treatment, or surface finishes which the purchaser may obtain by designating one or more of the available Supplementary
Requirements.
2. Referenced Documents
2
2.1 ASTM Standards:
A29/A29M Specification for Steel Bars, Carbon and Alloy, Hot-Wrought, General Requirements for
A304 Specification for Carbon and Alloy Steel Bars Subject to End-Quench Hardenability Requirements
A400 Practice for Steel Bars, Selection Guide, Composition, and Mechanical Properties
E112 Test Methods for Determining Average Grain Size
E381 Method of Macroetch Testing Steel Bars, Billets, Blooms, and Forgings
E527 Practice for Numbering Metals and Alloys in the Unified Numbering System (UNS)
3. Ordering Information
3.1 Orders under this specification should include the following as required to describe adequately the desired material:
3.1.1 Quantity (weight or number of bars),
3.1.2 Name of material (hot-wrought alloy steel bars),
3.1.3 Dimensions,
3.1.4 ASTM designation,
3.1.5 Deoxidation practice (see 5.3),
3.1.6 Grade designation or chemical composition limits (see 6.1 and Table 1),
3.1.7 Grain size if required,
3.1.8 Test reports, if required (Section 8),
3.1.9 Additions to the specification and Supplementary Requirements, if required, and
3.1.10 Application.
4. General Requirements
4.1 Material furnished under this specification shall conform to the applicable requirements of the current edition of
Specification A29/A29M, unless otherwise provided herein.
1
This specification is under the jurisdiction of ASTM Committee A01 on Steel, Stainless Steel and Related Alloys and is the direct responsibility of Subcommittee A01.15
on Bars.
Current edition approved May 1, 2007May 1, 2013. Published May 2007June 2013. Originally approved in 1947. Last previous edition approved in 20062007 as
A322 – 06.A322 – 07. DOI: 10.1520/A0322-07.10.1520/A0322-13.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
*A Summary of Changes section appears at the end of this standard
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1
---------------------- Page: 1 ----------------------
A322 − 13
A,B
TABLE 1 Grade Designations and Chemical Compositions of Hot-Wrought Alloy Steel Bars
D
UNS Grade Chemical Composition, Ranges and Limits, %
C
Designations
Designation E F
Carbon Manganese Phospho- Sulfur, Silicon Nickel Chromium Molybdenum
max
Phosphorus,
rus, max
G13300 1330 0.28–0.33 1.60–1.90 0.035 0.040 0.15–0.35 . . .
G13350 1335 0.33–0.38 1.60–1.90 0.035 0.040 0.15–0.35 . . .
G13400 1340 0.38–0.43 1.60–1.90 0.035 0.040 0.15–0.35 . . .
G13450 1345 0.43–0.48 1.60–1.90 0.035 0.040 0.15–0.35 . . .
G40230 4023 0.20–0.25 0.70–0.90 0.035 0.040 0.15–0.35 . . 0.20–0.30
G40120 4012 0.09–0.14 0.75–1.00 0.035 0.040 0.15–0.35 . . 0.15–0.25
G40240 4024 0.20–0.25 0.70–0.90 0.035 0.035– 0.15–0.35 . . 0.20–0.30
G40230 4023 0.20–0.25 0.70–0.90 0.035 0.040 0.15–0.35 . . 0.20–0.30
0.050
G40240 4024 0.20–0.25 0.70–0.90 0.035 0.035–0.050 0.15–0.35 . . 0.20–0.30
G40270 4027 0.25–0.30 0.70–0.90 0.035 0.04
...
Questions, Comments and Discussion
Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.