ASTM A575-96(2007)
(Specification)Standard Specification for Steel Bars, Carbon, Merchant Quality, M-Grades
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 A 576.
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 the standard.
General Information
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Standards Content (Sample)
NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
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Designation:A575 −96(Reapproved 2007)
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 Department of Defense.
1. Scope 4. Materials and Manufacture
1.1 This specification covers hot-wrought merchant quality 4.1 The steel shall be made by the open-hearth, basic-
carbon steel bars produced to a chemical composition. Mer- oxygen, or electric-furnace process.
chant quality bars are used for structural and similar miscella-
5. Conditions
neous bar applications involving moderate cold bending, mod-
erate hot forming, punching, and welding as used in the
5.1 Merchant quality bars are available in rounds, squares,
production of noncritical parts. Moderate cold bending in- round cornered squares, hexagons, and bar size shapes under 3
volves a generous bend radius with the axis of the bend
in. (76.2 mm), and in flats less than 40.8 lb/ft (60.7 kg/m).
transverse to the direction of rolling. Hot-wrought merchant quality carbon steel bars are produced
in cut lengths and coils; the producer should be consulted
1.2 Special quality hot-wrought carbon steel bars are cov-
regarding sections and sizes available in coils.
ered in Specification A576.
5.2 Merchant quality is available within a composition of
1.3 Some end uses may require one or more of the available
0.50 % maximum carbon, 0.60 % maximum manganese,
designations shown under Supplementary Requirements.
nonresulfurized, non-leaded. The phosphorus content is
1.4 The values stated in inch-pound units are to be regarded
0.04 %, max, and the sulfur content is 0.05 %, max. Merchant
as the standard.
quality grades of steel are shown in Table 1 and chemical
ranges and limits in Table 2; the grade numbers are designated
2. Referenced Documents
with the prefix “M.” Merchant quality bars are not produced to
2.1 ASTM Standards:
any specified silicon content, grain size, or other requirement
A29/A29M Specification for Steel Bars, Carbon and Alloy,
that would influence the type of steel.
Hot-Wrought, General Requirements for
5.3 Merchant quality bars shall be free of visible pipe;
A576 Specification for Steel Bars, Carbon, Hot-Wrought,
however, they may contain pronounced chemical segregation.
Special Quality
Internalporosity,surfaceseams,andothersurfaceirregularities
may be present in this quality.
3. Ordering Information
3.1 Orders under this specification should include the fol-
6. Chemical Composition
lowing as required to describe adequately the desired material:
6.1 The steel shall conform on heat analysis to the require-
3.1.1 ASTM specification number and date of issue,
ments of chemical composition in Table 1, or chemical
3.1.2 Grade designation or chemical composition (Section 7
compositions can be specified that conform to the ranges and
and appropriate chemical analysis tables),
limits in Table 2. The heat analysis shall be reported to the
3.1.3 Supplementary Requirements or additions, if required,
purchaser for the elements specified.
3.1.4 Dimensions and quantity, and
3.1.5 End use and processing.
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, 2007. Published January 2008. Originally
approved in 1967. Last previous edition approved in 2002 as A575 – 96 (2002).
DOI: 10.1520/A0575-96R07.
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
Standard
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