ASTM A322-91(2001)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
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Designation: A 322 – 91 (Reapproved 2001)
Standard Specification for
Steel Bars, Alloy, Standard Grades
This standard is issued under the fixed designation A 322; 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 (e) 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 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—A guide for the selection of steel bars is contained in Practice
3.1.3 Dimensions,
A 400.
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 Grade designation or chemical composition limits (see
Specification A 29/A 29M. 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-
1.4 The values stated in inch-pound units are to be regarded
form to the applicable requirements of the current edition of
as the standard.
Specification A 29/A 29M, unless otherwise provided herein.
2. Referenced Documents
5. Materials and Manufacture
2.1 ASTM Standards:
5.1 The steel shall be made by one or more of the following
A 29/A 29M Specification for Steel Bars, Carbon and Alloy,
primary processes: open-hearth, basic-oxygen, or electric-
Hot-Wrought and Cold-Finished, General Requirements
furnace. The primary melting may incorporate separate degas-
for
sing or refining and may be followed by secondary melting
A 304 Specification for Steel Bars, Alloy, Subject to End-
using electro-slag remelting or vacuum arc remelting. Where
Quench Hardenability Requirements
secondary melting is employed, the heat shall be defined as all
A 400 Practice for Steel Bars, Selection Guide, Composi-
of the ingots remelted from a single primary heat.
tion, and Mechanical Properties
5.2 The steel shall be furnished as strand cast or ingot cast,
E 112 Test Methods for Determining Average Grain Size
unless otherwise specified.
E 381 Method of Macroetch Testing, Inspection, and Rating
5.3 Deoxidation—Killed steel is required.
Steel Products, Comprising Bars, Billets, Blooms, and
5.3.1 The purchaser may designate that the steel be made to
Forgings
coarse or fine austenitic grain size. (See Supplementary Re-
E 527 Practice for Numbering Metals and Alloys (UNS)
quirement S9 or S10.)
5.4 Slow Cooling—Immediately after hot forming, the bars
shall be allowed to cool to a temperature below the critical
This specification is under the jurisdiction of ASTM Committee A01 on Steel,
range under suitable conditions to prevent imperfections
Stainless Steel, and Related Alloys and is the direct responsibility of Subcommittee
A01.15 on Bars.
caused by too rapid cooling.
Current edition approved Aug. 15, 1991. Published October 1991. Originally
published as A 322 – 47 T. Last previous edition A 322 – 90b.
Annual Book of ASTM Standards, Vol 01.05.
Annual Book of ASTM Standards, Vol 03.01.
Annual Book of ASTM Standards, Vol 01.01.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
A 322 – 91 (2001)
5.5 Thermal Treatment—Various thermal treatments such as 6. Chemical Composition
annealing, stress relief, quench and temper, normalize, etc., are
6.1 The heat analysis shall conform to the requirements for
available. Such treatments must be specified as a Supplemen-
chemical composition in Table 1 for the grade specified.
tary Requirement.
A,B
TABLE 1 Grade Designations and Chemical Compositions of Hot-Wrought Alloy Steel Bars
D
UNS Grade Chemical Composition, Ranges and Limits, %
C
Designation Designations
E F
Carbon Manganese Phospho- Sulfur, Silicon Nickel Chromium Molybdenum
rus, 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 1.60–1.90 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
G40240 4024 0.20–0.25 0.70–0.90 0.035 0.035– 0.15–0.35 . . 0.20–0.30
0.050
G40270 4027 0.25–0.30 0.70–0.90 0.035 0.040 0.15–0.35 . . 0.20–0.30
G40280 4028 0.25–0.30 0.70–0.90 0.035 0.035– 0.15–0.35 . . 0.20–0.30
0.050
G40370 4037 0.35–0.40 0.70–0.90 0.035 0.040 0.15–0.35 . . 0.20–0.30
G40470 4047 0.45–0.50 0.70–0.90 0.035 0.040 0.15–0.35 . . 0.20–0.30
G41180 4118 0.18–0.23 0.70–0.90 0.035 0.040 0.15–0.35 . 0.40–0.60 0.08–0.15
G41200 0.18–0.23 0.90–1.20 0.035 0.040 0.15–0.35 . 0.40–0.60 0.13–0.20
G41210 0.18–0.23 0.75–1.00 0.035 0.040 0.15–0.35 . 0.45–0.65 0.20–0.30
G41300 4130 0.28–0.33 0.40–0.60 0.035 0.040 0.15–0.35 . 0.80–1.10 0.15–0.25
G41370 4137 0.35–0.40 0.70–0.90 0.035 0.040 0.15–0.35 . 0.80–1.10 0.15–0.25
G41400 4140 0.38–0.43 0.75–1.00 0.035 0.040 0.15–0.35 . 0.80–1.10 0.15–0.25
G41420 4142 0.40–0.45 0.75–1.00 0.035 0.040 0.15–0.35 . 0.80–1.10 0.15–0.25
G41450 4145 0.43–0.48 0.75–1.00 0.035 0.040 0.15–0.35 . 0.80–1.10 0.15–0.25
G41470 4147 0.45–0.50 0.75–1.00 0.035 0.040 0.15–0.35 . 0.80–1.10 0.15–0.25
G41500 4150 0.48–0.53 0.75–1.00 0.035 0.040 0.15–0.35 . 0.80–1.10 0.15–0.25
G41610 4161 0.56–0.64 0.75–1.00 0.035 0.040 0.15–0.35 . 0.70–0.90 0.25–0.35
G43200 4320 0.17–0.22 0.45–0.65 0.035 0.040 0.15–0.35 1.65–2.00 0.40–0.60 0.20–0.30
G43400 4340 0.38–0.43 0.60–0.80 0.035 0.040 0.15–0.35 1.65–2.00 0.70–0.90 0.20–0.30
G43406 E4340 0.38–0.43 0.65–0.85 0.025 0.025 0.15–0.35 1.65–2.00 0.70–0.90 0.20–0.30
G46150 4615 0.13–0.18 0.45–0.65 0.035 0.040 0.15–0.35 1.65–2.00 . 0.20–0.30
G46200 4620 0.17–0.22 0.45–0.65 0.035 0.040 0.15–0.35 1.65–2.00 . 0.20–0.30
G46210 4621 0.18–0.23 0.70–0.90 0.035 0.040 0.15–0.35 1.65–2.00 . 0.20–0.30
G46260 4626 0.24–0.29 0.45–0.65 0.035 0.040 0.15–0.35 0.70–1.00 . 0.15–0.25
G47150 0.13–0.18 0.70–0.90 0.035 0.040 0.15–0.35 0.70–1.00 0.45–0.65 0.45–0.60
G47200 4720 0.17–0.22 0.50–0.70 0.035 0.040 0.15–0.35 0.90–1.20 0.35–0.55 0.15–0.25
G48150 4815 0.13–0.18 0.40–0.60 0.035 0.040 0.15–0.35 3.25–3.75 . 0.20–0.30
G48170 4817 0.13–0.20 0.40–0.60 0.035 0.040 0.15–0.35 3.25–3.75 . 0.20–0.30
G48200 4820 0.18–0.73 0.50–0.70 0.035 0.040 0.15–0.35 3.25–3.75 . 0.20–0.30
G51170 5117 0.15–0.20 0.70–0.90 0.035 0.040 0.15–0.35 . 0.70–0.90 .
G51200 5120 0.17–0.22 0.70–0.90 0.035 0.040 0.15–0.35 . 0.70–0.90 .
G51300 5130 0.28–0.33 0.70–0.90 0.035 0.040 0.15–0.35 . 0.80–1.10 .
G51320 5132 0.30–0.35 0.60–0.80 0.035 0.040 0.15–0.35 . 0.75–1.00 .
G51350 5135 0.33–0.38 0.60–0.80 0.035 0.040 0.15–0.35 . 0.80–1.05 .
G51400 5140 0.38–0.43 0.70–0.90 0.035 0.040 0.15–0.35 . 0.70–0.90 .
G51500 5150 0.48–0.53 0.70–0.90 0.035 0.040 0.15–0.35 . 0.70–0.90 .
G51550 5155 0.51–0.59 0.70–0.90 0.035 0.040 0.15–0.35 . 0.70–0.90 .
G51600 5160 0.56–0.64 0.75–1.00 0.035 0.040 0.15–0.35 . 0.70–0.90 .
G51986 E51100 0.98–1.10 0.25–0.45 0.025 0.025 0.15–0.35 . 0.90–1.15 .
G52986 E52100 0.98–1.10 0.25–0.45 0.025 0.025 0.15–0.35 . 1.30–1.60 .
Vanadium
G61180 6118 0.16–0.21 0.50–0.70 0.035 0.040 0.15–0.35 . 0.50–0.70 0.10–0.15
G61500 6150 0.48–0.53 0.70–0.90 0.035 0.040 0.15–0.35 . 0.80–1.10 0.15 min
Molybdenum
G86150 8615 0.13–0.18 0.70–0.90 0.035 0.04 0.15–0.35 0.40–0.70 0.40–0.60 0.15–0.25
G86170 8617 0.15–0.20 0.70–0.90 0.035 0.040 0.15–0.35 0.40–0.70 0.40–0.60 0.15–0.25
G86200 8620 0.18–0.23 0.70–0.90 0.035 0.04 0.15–0.35 0.40–0.70 0.40–0.60 0.15–0.25
G86220 8622 0.20–0.25 0.70–0.90 0.035 0.040 0.15–0.35 0.40–0.70 0.40–0.60 0.15–0.25
G86250 8625 0.23–0.28 0.70–0.90 0.035 0.040 0.15–0.35 0.40–0.70 0.40–0.60 0.15–0.25
G86270 8627 0.25–0.30 0.70–0.90 0.035 0.040 0.15–0.35 0.40–0.70 0.40–0.60 0.15–0.25
G86300 8630 0.28–0.33 0.70–0.90 0.03
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