ASTM A684/A684M-14

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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: A684/A684M − 12 A684/A684M − 14
Standard Specification for
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Steel, Strip, High-Carbon, Cold-Rolled
This standard is issued under the fixed designation A684/A684M; 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*
1.1 This specification covers cold-rolled, high-carbon strip in coils or cut lengths. Strip is classified as product that is 0.3000
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in. [7.6 mm] or less in thickness and over ⁄2 to 23 ⁄16 in. in. [12.5 to 600 mm] 600 mm] in width, inclusive. Strip tolerance
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products may be available in widths wider than 23 ⁄16 in. (600 mm) in. (600 mm) by agreement between purchaser and supplier;
however, such products are technically classified as cold-rolled sheet. The maximum of the specified carbon range is over 0.25 to
1.35 %, inclusive. It is furnished in the following types as specified:
1.1.1 Soft spheroidized annealed high-carbon steel is intended for applications requiring maximum cold forming. It is normally
produced to give the lowest maximum Rockwell hardness for each grade.
1.1.2 Soft annealed high-carbon steel is intended for applications requiring moderate cold forming. It is produced to a maximum
Rockwell hardness.
1.1.3 Intermediate hardness high-carbon steel is intended for applications where cold forming is slight or a stiff, springy product
is needed, or both. It is produced to specified Rockwell hardness ranges, the maximum being higher than obtained for the annealed
type.
1.1.4 Full hard high-carbon steel is intended for flat applications. It is produced to minimum Rockwell hardness requirements,
which vary with grade, microstructure and gauge. Full hard can be produced with either a pearlitic or spheroidized microstructure
or a mixture of both. The minimum hardness should be established between the consumer and the producer.
1.2 This specification is applicable for orders in either inch-pound units or SI units.
1.3 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each
system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the
two systems may result in non-conformance with the standard.
1.4 The tolerances in this specification are different than those in Specification A568/A568M and Specification A109/A109M.
1.5 For the purpose of determining conformance with this specification, values shall be rounded to the nearest unit in the right
hand place of figures used in expressing the limiting values in accordance with the rounding method of Practice E29.
1.6 This specification is expressed in both inch-pound units and SI units. However, unless the order specifies the applicable “M”
specification designation (SI units), the material shall be furnished to inch-pound units. The metric portions of the tables herein
list permissible variations in dimensions and mass (see Note 1) in SI (metric) units. The values listed are not exact conversions
of the values listed in the inch-pound tables but instead are rounded or rationalized values. Conformance to SI tolerances is
mandatory when the “M” specification is used.
NOTE 1—The term weight is used when inch-pound units are the standard. However, under SI the preferred term is mass.
2. Referenced Documents
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2.1 ASTM Standards:
A109/A109M Specification for Steel, Strip, Carbon (0.25 Maximum Percent), Cold-Rolled
A370 Test Methods and Definitions for Mechanical Testing of Steel Products
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This specification is under the jurisdiction of ASTM Committee A01 on Steel, Stainless Steel and Related Alloys and is the direct responsibility of Subcommittee A01.19
on Steel Sheet and Strip.
Current edition approved May 1, 2012Oct. 1, 2014. Published May 2012October 2014. Originally approved in 1973. Last previous edition approved in 20102012 as
A684/A684M – 10a.A684/A684M – 12. DOI: 10.1520/A0684_A0684M-12.10.1520/A0684_A0684M-14.
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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 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
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