ASTM A996/A996M-06a
(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
ABSTRACT
This specification covers rail-steel and axle-steel deformed bars for concrete reinforcement. The standard sizes and dimensions of deformed bars and their number designation are presented. The carbon determination, deformation requirements and deformation measurement are provided. The material shall conform to the requirements prescribed by the specification. The yield point or yield strength shall be determined by either drop of the beam or halt in the gage of the testing machine, or by extension under load using an autographic diagram method. For all bar sizes a tension test, a bend test and a set of dimensional property tests including bar weight and spacing, height, and gap of deformations shall be made from each lot of 10 tons.
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 – 06a
Standard Specification for
Rail-Steel and Axle-Steel Deformed Bars for Concrete
1
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
2
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 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 Standard:
3
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 2.3 Federal Standard:
3
footnotes, excluding those in tables and figures, shall not be Fed. Std. No. 123 Marking for Shipment (Civil Agencies)
considered as requirements of the specification.
3. Terminology
1.3 Type “rail symbol” and Type R are of two minimum
3.1 Definitions of Terms Specific to This Standard:
yield strength levels, namely 50 000 psi [350 MPa] and 60 000
psi [420 MPa] designated as Grade 50 [350] and Grade 60 3.1.1 deformed bar, n—steel bar with transverse protru-
sions; a bar that is intended for use as reinforcement in
[420], respectively. Type A is of two minimum yield levels,
namely 40 000 psi [280 MPa] and 60 000 psi [420 MPa] reinforced concrete construction.
3.1.1.1 Discussion—The surface of the bar is provided with
designated as Grade 40 [280] and Grade 60 [420], respectively.
lugs or protrusions that inhibit longitudinal movement of the
1.4 The weldability of the steel is not a requirement of this
specification. bar relative to the concrete surrounding the bar in such
construction.The lugs or protrusions conform to the provisions
1.5 This specification is applicable for orders in either
inch-pound units (Specification A 996) or SI units (Specifica- of this specification.
3.1.2 deformations, n—protrusions on a deformed bar.
tion A 996M).
1.6 The values stated in either inch-pound units or SI units 3.1.3 rib, n—longitudinal protrusion on a deformed bar.
are to be regarded as standard. Within the text, the SI units are
4. Ordering Information
shown in brackets. The values stated must be used indepen-
4.1 It shall be the responsibility of the purchaser to specify
dently of the other. Combining values from the two systems
all requirements that are necessary for material ordered to this
may result in nonconformance with the specification.
specification. Such requirements shall include, but are not
1.7 This standard does not purport to address all of the
limited to, the following.
safety concerns, if any, associated with its use. It is the
4.1.1 Quantity (weight) [mass],
responsibility of the user of this standard to establish appro-
priate safety and health practices and determine the applica-
bility of regulatory limitations prior to use.
2
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
1
This specification is under the jurisdiction of ASTM Committee A01 on Steel, Standards volume information, refer to the standard’s Document Summary page on
Stainless Steel and Related Alloys and is the direct responsibility of Subcommittee the ASTM website.
3
A01.05 on Steel Reinforcement. AvailablefromStandardizationDocumentsOrderDesk,Bldg.4SectionD,700
Current edition approved May 1, 2006. Published May 2006. Originally Robbins Ave., Philadelphia, PA 19111-5094, Attn: NPODS. Or visit: http://
approved in 1998. Last previous edition approved in 2006 as A 996/A 996M – 06. assist.daps.dla.mil/online.
*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.
1
---------------------- Page: 1 ----------------------
A 996/A 996M – 06a
TABLE 1 Deformed Bar Designation Numbers, Nominal Weights [Masses], Nominal Dimensions, and Deformation Requirements
B
Nominal Dimensions Deformation Requirements,
...
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:A996/A996M–06 Designation: A 996/A 996M – 06a
Standard Specification for
Rail-Steel and Axle-Steel Deformed Bars for Concrete
1
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 (´) indicates an editorial change since the last revision or reapproval.
1. 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. TypeAis 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 Thevaluesstatedineitherinch-poundunitsorSIunitsaretoberegardedasstandard.Withinthetext,theSIunitsareshown
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.
2. Referenced Documents
2
2.1 ASTM Standards:
A 370 Test Methods and Definitions for Mechanical Testing of Steel Products
A 700 Practices for Packaging, Marking, and Loading Methods for Steel Products for Shipment
E29 Practice for Using Significant Digits in Test Data to Determine Conformance with Specifications
2.2 Military Standard:
3
MIL-STD-129 Marking for Shipment and Storage
2.3 Federal Standard:
3
Fed. Std. No. 123 Marking for Shipment (Civil Agencies)
3. Terminology
3.1 Definitions of Terms Specific to This Standard:
3.1.1 deformed bar, n—steel bar with transverse protrusions; a bar that is intended for use as reinforcement in reinforced
concrete construction.
3.1.1.1 Discussion—The surface of the bar is provided with lugs or protrusions that inhibit longitudinal movement of the bar
relative to the concrete surrounding the bar in such construction. The lugs or protrusions conform to the provisions of this
specification.
1
This specification is under the jurisdiction ofASTM CommitteeA01 on Steel, Stainless Steel and RelatedAlloys and is the direct responsibility of SubcommitteeA01.05
on Steel Reinforcement.
Current edition approved MarchMay 1, 2006. Published MarchMay 2006. Originally approved in 1998. Last previous edition approved in 20052006 as A 996/A
996M–05a.996M – 06.
2
For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM 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.
3
Available from Standardization Documents Order Desk, Bldg. 4 Section D, 700 Robbins Ave., Philadelphia, PA 19111-5094, Attn: NPODS. Or visit: http://
assist.daps.dla.mil/online.
*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.
1
---------------------- Page: 1 ----------------------
A 996/A 996M – 06a
TABLE 1 Deformed Bar Designation Numbers, Nominal Weights [Masses], Nominal Dimensions, and Deformation Requirements
B
Nominal Dimensions Deformation Requirements, in. [mm]
Nominal Weight,
Bar Designation
Maximum Gap
lb/ft [Nominal Mass,
A
Cross
...
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