ASTM A996/A996M-05a
(Specification)Standard Specification for Rail-Steel and Axle-Steel Deformed Bars for Concrete Reinforcement
Standard Specification for Rail-Steel and Axle-Steel Deformed Bars for Concrete Reinforcement
SCOPE
1.1 This specification covers rail-steel and axle-steel bars for concrete reinforcement. Three types of product are included, designated with a "rail symbol," and an "R" for bars made of rail-steel and with an "A" for bars made of axle-steel. The standard sizes and dimensions of deformed bars and their number designations are given in Table 1. All sizes and grades of all types may not be readily available; manufacturers should be consulted to verify availability.
1.2 The text of this specification references notes and footnotes that provide explanatory material. These notes and footnotes, excluding those in tables and figures, shall not be considered as requirements of the specification.
1.3 Type "rail symbol" and Type R are of two minimum yield strength levels, namely 50 000 psi [350 MPa] and 60 000 psi [420 MPa] designated as Grade 50 [350] and Grade 60 [420], respectively. Type A is of two minimum yield levels, namely 40 000 psi [280 MPa] and 60 000 psi [420 MPa] designated as Grade 40 [280] and Grade 60 [420], respectively.
1.4 The weldability of the steel is not a requirement of this specification.
1.5 This specification is applicable for orders in either inch-pound units (Specification A 996) or SI units (Specification A 996M).
1.6 The values stated in either inch-pound units or SI units are to be regarded as standard. Within the text, the SI units are shown in brackets. The values stated must be used independently of the other. Combining values from the two systems may result in nonconformance with the specification.
1.7 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
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Designation: A 996/A 996M – 05a
Standard Specification for
Rail-Steel and Axle-Steel Deformed Bars for Concrete
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Reinforcement
This standard is issued under the fixed designationA 996/A 996M; 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* 2. Referenced Documents
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1.1 This specification covers rail-steel and axle-steel bars 2.1 ASTM Standards:
for concrete reinforcement. Three types of product are in- A 370 Test Methods and Definitions for MechanicalTesting
cluded, designated with a “rail symbol,” and an “R” for bars of Steel Products
made of rail-steel and with an “A” for bars made of axle-steel. A 700 Practices for Packaging, Marking, and Loading
The standard sizes and dimensions of deformed bars and their Methods for Steel Products for Domestic Shipment
number designations are given in Table 1.All sizes and grades E29 Practice for Using Significant Digits in Test Data to
of all types may not be readily available; manufacturers should Determine Conformance with Specifications
be consulted to verify availability. 2.2 Military Standards:
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1.2 The text of this specification references notes and MIL-STD-129 Marking for Shipment and Storage
footnotes that provide explanatory material. These notes and MIL-STD-163 Steel Mill Products Preparation for Ship-
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footnotes, excluding those in tables and figures, shall not be ment and Storage
considered as requirements of the specification. 2.3 Federal Standard:
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1.3 Type “rail symbol” and Type R are of two minimum Fed. Std. No. 123 Marking for Shipment (Civil Agencies)
yield strength levels, namely 50 000 psi [350 MPa] and 60 000
3. Terminology
psi [420 MPa] designated as Grade 50 [350] and Grade 60
3.1 Definitions of Terms Specific to This Standard:
[420], respectively. Type A is of two minimum yield levels,
namely 40 000 psi [280 MPa] and 60 000 psi [420 MPa] 3.1.1 deformed bar, n—steel bar with transverse protru-
sions; a bar that is intended for use as reinforcement in
designated as Grade 40 [280] and Grade 60 [420], respectively.
reinforced concrete construction.
1.4 The weldability of the steel is not a requirement of this
specification. 3.1.1.1 Discussion—The surface of the bar is provided with
lugs or protrusions that inhibit longitudinal movement of the
1.5 This specification is applicable for orders in either
inch-pound units (Specification A 996) or SI units (Specifica- bar relative to the concrete surrounding the bar in such
construction.The lugs or protrusions conform to the provisions
tion A 996M).
1.6 The values stated in either inch-pound units or SI units of this specification.
3.1.2 deformations, n—protrusions on a deformed bar.
are to be regarded as standard. Within the text, the SI units are
shown in brackets. The values stated must be used indepen- 3.1.3 rib, n—longitudinal protrusion on a deformed bar.
dently of the other. Combining values from the two systems
4. Ordering Information
may result in nonconformance with the specification.
4.1 It shall be the responsibility of the purchaser to specify
1.7 This standard does not purport to address all of the
all requirements that are necessary for material ordered to this
safety concerns, if any, associated with its use. It is the
specification. Such requirements shall include, but are not
responsibility of the user of this standard to establish appro-
limited to, the following.
priate safety and health practices and determine the applica-
4.1.1 Quantity (weight) [mass],
bility of regulatory limitations prior to use.
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For referenced ASTM standards, visit the ASTM website, www.astm.org, or
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This specification is under the jurisdiction of ASTM Committee A01 on Steel, contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
Stainless Steel and Related Alloys and is the direct responsibility of Subcommittee Standards volume information, refer to the standard’s Document Summary page on
A01.05 on Steel Reinforcement. the ASTM website.
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Current edition approved July 1, 2005. Published July 2005. Originally approved Available from Standardization Documents Order Desk, Bldg. 4, Section D,
in 1998. Last previous edition approved in 2005 as A 996/A 996M – 05.
700 Robbins Ave., Philadelphia, PA 19111–5094.
*ASummary 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.
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A 996/A 996M – 05a
TABLE 1 Deformed Bar Designation Numbers, Nominal Weights [Masses], Nominal Dimensions, and Deformation Requirements
B
Nominal
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