ASTM A575-20

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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: A575 − 96 (Reapproved 2018) A575 − 20
Standard Specification for
Steel Bars, Carbon, Merchant Quality, M-Grades
This standard is issued under the fixed designation A575; 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 Scope*
1.1 This specification covers hot-wrought merchant quality carbon steel bars produced to a chemical composition. Merchant
quality bars are used for structural and similar miscellaneous bar applications involving moderate cold bending, moderate hot
forming, punching, and welding as used in the production of noncritical parts. Moderate cold bending involves a generous bend
radius with the axis of the bend transverse to the direction of rolling.
1.2 Special quality hot-wrought carbon steel bars are covered in Specification A576.
1.3 Some end uses may require one or more of the available designations shown under Supplementary Requirements.
1.4 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical
conversions to SI units that are provided for information only and are not considered standard.
1.5 This international standard was developed in accordance with internationally recognized principles on standardization
established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued
by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
2. Referenced Documents
2.1 ASTM Standards:
A29/A29M Specification for General Requirements for Steel Bars, Carbon and Alloy, Hot-Wrought
A576 Specification for Steel Bars, Carbon, Hot-Wrought, Special Quality
3. Ordering Information
3.1 Orders under this specification should include the following as required to describe adequately the desired material:
3.1.1 ASTM specification number and date of issue,
3.1.2 Grade designation or chemical composition (Section 7 and appropriate chemical analysis tables),
3.1.3 Supplementary Requirements or additions, if required,
3.1.4 Dimensions and quantity, and
3.1.5 End use and processing.
4. Materials and Manufacture
4.1 The steel shall be made by the basic-oxygen or electric-furnace process.
5. Conditions
5.1 Merchant quality bars are available in rounds, squares, round cornered squares, hexagons, and bar size shapes under 3 in.
3 in. (76.2 mm), and in flats less than 40.8 lb/ft (60.7 kg/m). Hot-wrought merchant quality carbon steel bars are produced in cut
lengths and coils; the producer should be consulted regarding sections and sizes available in coils.
5.2 Merchant quality is available within a composition of 0.50 % maximum carbon, 0.60 % maximum manganese,
nonresulfurized, non-leaded. The phosphorus content is 0.04 %, max, and the sulfur content is 0.05 %, max. Merchant quality
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 Sept. 1, 2018July 1, 2020. Published September 2018July 2020. Originally approved in 1967. Last previous edition approved in 20132018 as
ɛ1
A575–96(2013)A575 . –96 (2018). DOI: 10.1520/A0575-96R18.10.1520/A0575-20.
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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
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A575 − 20
grades of steel are shown in Table 1 and chemical ranges and limits in Table 2; the grade numbers are designated with the prefix
“M.” Merchant quality bars are not produced to any specified silicon content, grain size, or other requirement that would
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