Designation: A 529/A 529M – 05
Standard Specification for
High-Strength Carbon-Manganese Steel of Structural
Quality1
This standard is issued under the fixed designation A 529/A 529M; 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. General Requirements for Delivery
1.1 This specification covers carbon-manganese steel 3.1 Material furnished under this specification shall con-
shapes, plates, and bars of structural quality for use in riveted, form to the requirements of the current edition of Specification
bolted, or welded construction of buildings and for general A 6/A 6M, for the ordered material, unless a conflict exists in
structural purposes. which case this specification shall prevail.
1.2 Material under this specification is available in two
grades: 4. Materials and Manufacture
Grade Yield Strength, Thickness 4.1 The steel shall be killed, and such shall be affirmed in
ksi [MPa] the test report by the inclusion of a statement of killed steel, a
50 [345] 50 [345] Plates to 1 in. [25 mm] thick
to 15 in. [380 mm] wide
value of 0.10 % or more for silicon content, or a value of
Bars to 31⁄2 in. [90 mm] 0.015 % or more for total aluminum content.
Shapes with flange or leg thickness to
11⁄2 in. [40 mm] inclusive 5. Chemical Composition
55 [380] 55 [380] Plates to 1 in. [25 mm] thick
to 15 in. [380 mm] wide 5.1 Heat Analysis:
Bars to 3 in. [75 mm] 5.1.1 The heat analysis shall conform to the requirements
Shapes with flange or leg thickness to
11⁄2 in. [40 mm] inclusive
prescribed in Table 1.
5.1.2 In addition to the elements specified in Table 1, test
1.3 When the steel is to be welded, it is presupposed that a reports shall include for information the chemical analysis for
welding procedure suitable for the grade of steel and intended copper, columbium, chromium, nickel, molybdenum, and va-
use or service will be utilized. See Appendix X3 of Specifica- nadium. When the amount of copper, chromium, nickel,
tion A 6/A 6M for information on weldability. molybdenum, or silicon is less than 0.02 %, the analysis may
1.4 The values stated in either inch-pound units or SI units be reported as “<0.02 %.” When the amount of columbium or
are to be regarded as standard. Within the text, the SI units are vanadium is less than 0.008 %, the analysis may be reported as
shown in brackets. The values stated in each system are not “<0.008 %.”
exact equivalents; therefore, each system must be used inde- 5.2 Product Analysis:
pendently of the other. 5.2.1 The steel shall conform on product analysis to the
2. Referenced Documents requirements of Table 1, subject to the product analysis
tolerances in Specification A 6/A 6M.
2.1 ASTM Standards: 2
A 6/A 6M Specification for General Requirements for 6. Tension Test
Rolled Structural Steel Bars, Plates, Shapes, and Sheet 6.1 The material as represented by the test specimen shall
Piling conform to the requirements as to the tensile properties
prescribed in Table 2.
1
This specification is under the jurisdiction of ASTM Committee A01 on Steel, 7. Keywords
Stainless Steel, and Related Alloys, and is the direct responsibility of Subcommittee
A01.02 on Structural Steel for Bridges, Buildings, Rolling Stock, and Ships. 7.1 bars; bolted construction; carbon; frames; metal build-
Current edition approved March 1, 2005. Published March 2005. Originally ing systems; plates; riveted construction; shapes; steel; struc-
approved in 1964. Last previous edition approved in 2004 as A 529/A 529M – 04.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
tural steel; trusses; welded construction
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.
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A 529/A 529M – 05
TABLE 1 Chemical Requirements (Heat Analysis)
NOTE—A maximum of 1.50 % manganese is permissible, with an
associated reduction of the carbon maximum of 0.01 percentage point for
each 0.05 percentage point increase in manganese.
Element Composition, %
Grades 50 [345]
and 55 [380]
Carbon, max 0.27
Manganese, max 1.35
Phosphorus, max 0.04
Sulfur, max 0.05
Silicon, max 0.40
Copper, min, when copper is speci- 0.20
fied
TABLE 2 Tensile RequirementsA
Grade 50 [345] Grade 55 [380]
ksi [MPa] ksi [MPa]
Tensile strength, min 70B [485] 70 [485]
Tensile strength, max 100 [690] 100 [690]
Yield strength, min 50 [345] 55 [380]
Elongation in 8 in. [200 mm], 18 17
min, %
Elongation in 2 in. [50 mm], 21 20
min, %
A
See the Orientation subsection in the Tension Tests section of Specification
A 6/A 6M.
B
Minimum tensile strength for Grade 50 shapes with flange or leg thickness to
1 1⁄2 in. [40 mm] inclusive, shall be 65 ksi [450 MPa].
SUPPLEMENTARY REQUIREMENTS
Standardized supplementary requirements for use at the option of the purchaser are listed in
Specification A 6/A 6M. Those that are considered suitable for use with this specification are listed by
title:
S5. Charpy V-Notch Impact Test. in the purchase documents. This value will be based on heat
In addition, the following optional supplementary require- analysis. The required chemical analysis as well as the carbon
ments are also suitable for use with this specification. equivalent shall be reported.
S32. Single Heat Bundles. S78.2 The carbon equivalent shall be calculated using the
S32.1 Bundles containing shapes or bars shall be from a following formula:
single heat of steel. CE = C + (Mn + Si)/6 + (Cu + Ni)/15 + (Cr + Mo + V + Cb)/5
S78. Maximum Carbon Equivalent. S79. Maximum Tensile Strength.
S78.1 This material shall be supplied with a maximum S79.1 The maximum tensile strength shall be 90 ksi [620
carbon equivalent value of 0.55 % or to a lower value specified MPa].
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A 529/A 529M – 05
SUMMARY OF CHANGES
Committee A01 has identified the location of selected changes to this standard since the last issue (A 529/A
529M – 04) that may impact the use of this standard. (Approved March 1, 2005.)
(1) Revised section 1.2.
Committee A01 has identified the location of selected changes to this standard since the last issue (A 529/A 529M – 03) that
may impact the use of this standard. (Approved April 1, 2004.)
(1) Added Supplementary Requirement S32.
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