ASTM A573.pdf
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Designation: A 573/A 573M – 05
Standard Specification for
Structural Carbon Steel Plates of Improved Toughness
1
This standard is issued under the fixed designation A 573/A 573M; 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.
1. Scope*
1.1 This specification covers structural quality carbon-
manganese-silicon steel plates in three tensile strength ranges
intended primarily for service at atmospheric temperatures
where improved notch toughness is important.
1.2 Plates covered by this specification are limited to a
maximum thickness of 1.5 in. [40 mm].
1.3 If the steel is to be welded, it is presupposed that a
welding procedure suitable for the grade of steel and intended
use or service will be utilized. See Appendix X 3 of Specifi-
cation
A 6/A 6M for information on weldability.
1.4 The values stated in either inch-pound units or SI units
are to be regarded separately as standard. Within the text, the
SI units are shown in brackets. The values stated in each
system are not exact equivalents; therefore, each system is to
be used independently of the other without combining values in
any way.
2. Referenced Documents
2.1 ASTM Standards:
2
A 6/A 6M Specification for General Requirements for
Rolled Structural Steel Bars, Plates, Shapes, and Sheet
Piling
3. General Requirements for Delivery
3.1 Plates furnished under this specification shall conform
to the requirements of the current edition of Specification
A 6/A 6M, unless a conflict exists in which case this specifi-
cation shall prevail.
4. Materials and Manufacture
4.1 The steel shall be made to fine grain practice.
5. Chemical Composition
5.1 The heat analysis shall conform to the requirements
given in
Table 1.
5.2 The product analysis shall conform to the requirements
given in
Table 1 subject to the product analysis tolerances in
Specification A 6/A 6M.
6. Tension Test
6.1 The plates, as represented by the tension test specimens,
shall conform to the tensile requirements given in
Table 2.
7. Keywords
7.1 carbon steel; plates; structural steel; toughness; welded
construction
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
A01.02 on Structural Steel for Bridges, Buildings, Rolling Stock, and Ships.
Current edition approved Sept. 1, 2005. Published September 2005. Originally
approved in 1966. Last previous edition approved in 2000 as A 573/A 573M – 00a.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website.
TABLE 1 Chemical Requirements (Heat Analysis)
Composition, %
Grade 58
[400]
Grade 65
[450]
Grade 70
[485]
Carbon, max:
1
⁄
2
in. [13 mm] and under 0.23 0.24 0.27
Over
1
⁄
2
in. [13 mm] to 1
1
⁄
2
in.,
[40 mm], incl
0.23 0.26 0.28
Manganese
A
0.60–0.90 0.85–1.20 0.85–1.20
Phosphorus, max 0.035 0.035 0.035
Sulfur, max 0.04 0.04 0.04
Silicon 0.10–0.35 0.15–0.40 0.15–0.40
A
For each reduction of 0.01 percentage point below the specified maximum for
carbon, an increase of 0.06 percentage points above the specified maximum for
manganese is permitted, up to a maximum of 1.50 % for Grades 58 and 65; and
up to a maximum of 1.60 % for Grade 70.
TABLE 2 Tensile Requirements
A
Grade 58
[400]
Grade 65
[450]
Grade 70
[485]
Tensile strength, ksi
[MPa]
58–71
[400–490]
65–77
[450–530]
70–90
[485–620]
Yield point, min, ksi
[MPa]
32
[220]
35
[240]
42
[290]
Elongation in 8 in. [200
mm] min
B,C
,%
21 20 18
Elongation in 2 in. [50
mm], min
B,C
,%
24 23 21
A
See the Orientation subsection in the Tension Tests section of Specification
A 6/A 6M.
B
Elongation need not be determined for floor plate.
C
For plates wider than 24 in. [600 mm], the elongation requirement is reduced
two percentage points. See the Elongation Requirement Adjustments subsection
in the Tension Tests section of Specification A 6/A 6M.
1
*A Summary of Changes section appears at the end of this standard.
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Copyright by ASTM Int'l (all rights reserved);
Reproduction authorized per License Agreement with Kathe Hooper (ASTMIHS Account); Mon Sep 19 09:56:05 EDT 2005
Copyright ASTM International
Reproduced by IHS under license with ASTM
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