ASTM A575-20

Standard Specification for Steel Bars, Carbon, Merchant Quality, M-Grades

ABSTRACT
This specification covers M-grade 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 generous bend radius with the axis of the bend transverse to the direction of rolling. Heat analysis shall conform to the requirements as to chemical composition.
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.

General Information

• Status: Published
• Publication Date: 30-Jun-2020
• ICS: 77.140.60 - Steel bars and rods
• Technical Committee: A01 - Steel, Stainless Steel and Related Alloys
• Drafting Committee: A01.15 - Bars

Standards Content (Sample)

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.
Designation:A575 −20
Standard Specification for
1
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* 3. Ordering Information
3.1 Orders under this specification should include the fol-
1.1 This specification covers hot-wrought merchant quality
lowing as required to describe adequately the desired material:
carbon steel bars produced to a chemical composition. Mer-
3.1.1 ASTM specification number and date of issue,
chant quality bars are used for structural and similar miscella-
3.1.2 Grade designation or chemical composition (Section 7
neous bar applications involving moderate cold bending, mod-
and appropriate chemical analysis tables),
erate hot forming, punching, and welding as used in the
3.1.3 Supplementary Requirements or additions, if required,
production of noncritical parts. Moderate cold bending in-
3.1.4 Dimensions and quantity, and
volves a generous bend radius with the axis of the bend
3.1.5 End use and processing.
transverse to the direction of rolling.
1.2 Special quality hot-wrought carbon steel bars are cov-
4. Materials and Manufacture
ered in Specification A576.
4.1 The steel shall be made by the basic-oxygen or electric-
1.3 Some end uses may require one or more of the available
furnace process.
designations shown under Supplementary Requirements.
5. Conditions
1.4 The values stated in inch-pound units are to be regarded
5.1 Merchant quality bars are available in rounds, squares,
as standard. The values given in parentheses are mathematical
round cornered squares, hexagons, and bar size shapes under
conversions to SI units that are provided for information only
3 in. (76.2 mm), and in flats less than 40.8 lb/ft (60.7 kg/m).
and are not considered standard.
Hot-wrought merchant quality carbon steel bars are produced
1.5 This international standard was developed in accor-
in cut lengths and coils; the producer should be consulted
dance with internationally recognized principles on standard-
regarding sections and sizes available in coils.
ization established in the Decision on Principles for the
5.2 Merchant quality is available within a composition of
Development of International Standards, Guides and Recom-
0.50 % maximum carbon, 0.60 % maximum manganese,
mendations issued by the World Trade Organization Technical
nonresulfurized, non-leaded. The phosphorus content is
Barriers to Trade (TBT) Committee.
0.04 %, max, and the sulfur content is 0.05 %, max. Merchant
quality grades of steel are shown in Table 1 and chemical
2. Referenced Documents
ranges and limits in Table 2; the grade numbers are designated
2
2.1 ASTM Standards:
with the prefix “M.” Merchant quality bars are not produced to
A29/A29M SpecificationforGeneralRequirementsforSteel
any specified silicon content, grain size, or other requirement
Bars, Carbon and Alloy, Hot-Wrought
that would influence the type of steel.
A576 Specification for Steel Bars, Carbon, Hot-Wrought,
5.3 Merchant quality bars shall be free of visible pipe;
Special Quality
however, they may contain pronounced chemical segregation.
Internalporosity,surfaceseams,andothersurfaceirregularities
may be present in this quality.
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
6. Chemical Composition
A01.15 on Bars.
6.1 The steel shall conform on heat analysis to the require-
Current edition approved July 1, 2020. Published July 2020. Originally approved
in 1967. Last previous edition approved in 2018 as A575–96 (2018). DOI:
ments of chemical composition in Table 1, or chemical
10.1520/A0575-20.
compositions can be specified that conform to the ranges and
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
limits in Table 2. The heat analysis shall be reported to the
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
purchaser for the elements specified.
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

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...

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: A575 − 96 (Reapproved 2018) A575 − 20
Standard Specification for
1
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
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
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 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.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at [e-mail]. 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 ----------------------
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 influence
the type of steel.
5.3 Merchant quality bars shall be free of visible pipe; however, they may contain pronounced chemical segregation. Internal
porosity, surface seams, and other surface irregularities may be present in this quality.
6. Chemical Composition
6.1 The steel
...