ASTM A955/A955M-18a
(Specification)Standard Specification for Deformed and Plain Stainless Steel Bars for Concrete Reinforcement
Standard Specification for Deformed and Plain Stainless Steel Bars for Concrete Reinforcement
ABSTRACT
This specification covers deformed and plain stainless steel bars for concrete reinforcement proposed to be used in applications requiring corrosion resistance or controlled magnetic permeability. For each specimen, one tension test, one bend test, if required, and one set of dimensional property tests shall be made. For martensitic materials, two hardness tests shall be performed per lot of material. If the results of the test fail to meet the specified minimum requirements, a retest shall be permitted on two random specimens for each original tension specimen failure from the lot. If a specimen fails a bend test due to reasons other than mechanical or flaws, a retest shall be permitted on two random specimens from the same lot.
SCOPE
1.1 This specification covers deformed and plain stainless steel bars for concrete reinforcement in cut lengths and coils used in applications requiring resistance to corrosion or controlled magnetic permeability. The standard sizes and dimensions of deformed bars and their numerical designation shall be those listed in Table 1. The text of this specification references notes and footnotes which provide explanatory material. These notes and footnotes (excluding those in tables and figures) shall not be considered as requirements of the specification.
1.1.1 Supplementary requirement (S1) of an optional nature is provided. It shall apply only when specified by the purchaser. In order to obtain a controlled magnetic permeability product, steel conforming to Supplementary Requirement S1 should be ordered.
1.2 The chemical composition of the stainless steel alloy shall be selected for suitability to the application involved by agreement between the manufacturer and the purchaser. This is an important consideration in achieving the desired corrosion resistance or controlled magnetic permeability, or both, because these properties are not provided by all stainless steels.
Note 1: The austenitic and austenitic-ferritic (duplex) alloys shown in Table 2 are known to be sold by producers to the requirements of this specification. It provides guidance and is not a mandatory chemical composition table. Other alloys may also provide desired properties; consult with the manufacturer for stainless steel alloy properties and availability. After adoption of Annex A5, a mandatory chemical composition requirements table will be balloted in accordance with its requirements. This note and references to Specification A276/A276M will be simultaneously removed.
1.3 The requirements for introduction of new alloys into a mandatory chemical composition requirements table in this specification are given in Annex A5.
1.4 Requirements for the relative deformation area of three-sided deformed bars are contained in Annex A4.
1.5 Bars are of three minimum yield strength levels, namely, 60 000 psi [420 MPa], 75 000 psi [520 MPa], and 80 000 psi [550 MPa], designated as Grade 60 [420], Grade 75 [520], or Grade 80 [550], respectively.
1.6 Plain bars in sizes up to and including 2 in. [50.8 mm] in diameter in coils or cut lengths are furnished in accordance with this specification in Grade 60 [420], Grade 75 [520], and Grade 80 [550], respectively. Mechanical testing, when required, shall be to the nearest nominal deformed bar size. Requirements providing for deformations and marking shall not be applicable to plain bars.
1.7 When stainless steel is to be welded, use a procedure suitable for the chemical composition and intended use or service.
Note 2: Welding of stainless steel reinforcement would occur after shipment from the producer. Structural welding should be performed in accordance with the latest edition of AWS D1.6/D1.6M, any other internationally accepted stainless steel welding code, or a procedure suggested by the material producer. AWS D1.6/D1.6M describes the proper selection of the filler metals, temperature control, as well as, performance, procedure qualification ...
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Designation: A955/A955M −18a
Standard Specification for
Deformed and Plain Stainless Steel Bars for Concrete
1
Reinforcement
This standard is issued under the fixed designationA955/A955M; 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* 1.5 Barsareofthreeminimumyieldstrengthlevels,namely,
60 000 psi [420 MPa], 75 000 psi [520 MPa], and 80 000 psi
1.1 This specification covers deformed and plain stainless
[550 MPa], designated as Grade 60 [420], Grade 75 [520], or
steel bars for concrete reinforcement in cut lengths and coils
Grade 80 [550], respectively.
used in applications requiring resistance to corrosion or con-
trolled magnetic permeability. The standard sizes and dimen- 1.6 Plain bars in sizes up to and including 2 in. [50.8 mm]
in diameter in coils or cut lengths are furnished in accordance
sionsofdeformedbarsandtheirnumericaldesignationshallbe
those listed in Table 1. The text of this specification references with this specification in Grade 60 [420], Grade 75 [520], and
Grade 80 [550], respectively. Mechanical testing, when
notes and footnotes which provide explanatory material. These
notesandfootnotes(excludingthoseintablesandfigures)shall required, shall be to the nearest nominal deformed bar size.
Requirements providing for deformations and marking shall
not be considered as requirements of the specification.
not be applicable to plain bars.
1.1.1 Supplementary requirement (S1) of an optional nature
isprovided.Itshallapplyonlywhenspecifiedbythepurchaser.
1.7 When stainless steel is to be welded, use a procedure
In order to obtain a controlled magnetic permeability product,
suitable for the chemical composition and intended use or
steel conforming to Supplementary Requirement S1 should be
service.
ordered.
NOTE 2—Welding of stainless steel reinforcement would occur after
1.2 The chemical composition of the stainless steel alloy
shipment from the producer. Structural welding should be performed in
shall be selected for suitability to the application involved by accordance with the latest edition of AWS D1.6/D1.6M, any other
internationally accepted stainless steel welding code, or a procedure
agreement between the manufacturer and the purchaser.This is
suggested by the material producer. AWS D1.6/D1.6M describes the
an important consideration in achieving the desired corrosion
proper selection of the filler metals, temperature control, as well as,
resistance or controlled magnetic permeability, or both, be-
performance, procedure qualification and inspection requirements.
cause these properties are not provided by all stainless steels.
1.8 This specification is applicable for orders in either
NOTE 1—The austenitic and austenitic-ferritic (duplex) alloys shown in inch-pound units (as Specification A955) or in SI units (as
Table 2 are known to be sold by producers to the requirements of this
Specification A955M).
specification. It provides guidance and is not a mandatory chemical
1.9 The values stated in either inch-pound or SI units are to
composition table. Other alloys may also provide desired properties;
consult with the manufacturer for stainless steel alloy properties and
be regarded separately as standard.Within the text, the SI units
availability. After adoption of Annex A5, a mandatory chemical compo-
are shown in brackets.The values stated in each system are not
sition requirements table will be balloted in accordance with its require-
exact equivalents; therefore, each system shall be used inde-
ments. This note and references to Specification A276/A276M will be
pendentlyoftheother.Combiningvaluesfromthetwosystems
simultaneously removed.
may result in nonconformance with the standard.
1.3 The requirements for introduction of new alloys into a
1.10 This specification does not purport to address all of the
mandatory chemical composition requirements table in this
safety concerns, if any, associated with its use. It is the
specification are given in Annex A5.
responsibility of the user of this specification to establish
1.4 Requirements for the relative deformation area of three-
appropriate safety, health, and environmental practices and
sided deformed bars are contained in Annex A4.
determine the applicability of regulatory limitations prior to
use.
1.11 This international standard was developed in accor-
1
dance with internationally recognized principles on standard-
This specification is under the jurisdiction ofASTM Committee A01 on Steel,
Stainless Steel and Related Alloys and is the direct responsibility of Subcommittee
ization established in the Decision on Principles for the
A01.05
...
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: A955/A955M − 18 A955/A955M − 18a
Standard Specification for
Deformed and Plain Stainless Steel Bars for Concrete
1
Reinforcement
This standard is issued under the fixed designation A955/A955M; 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 deformed and plain stainless steel bars for concrete reinforcement in cut lengths and coils used in
applications requiring resistance to corrosion or controlled magnetic permeability. The standard sizes and dimensions of deformed
bars and their numerical designation shall be those listed in Table 1. The text of this specification references notes and footnotes
which provide explanatory material. These notes and footnotes (excluding those in tables and figures) shall not be considered as
requirements of the specification.
1.1.1 Supplementary requirement (S1) of an optional nature is provided. It shall apply only when specified by the purchaser.
In order to obtain a controlled magnetic permeability product, steel conforming to Supplementary Requirement S1 should be
ordered.
1.2 The chemical composition of the stainless steel alloy shall be selected for suitability to the application involved by
agreement between the manufacturer and the purchaser. This is an important consideration in achieving the desired corrosion
resistance or controlled magnetic permeability, or both, because these properties are not provided by all stainless steels.
NOTE 1—The austenitic and austenitic-ferritic (duplex) alloys shown in Table 2 are known to be sold by producers to the requirements of this
specification. It provides guidance and is not a mandatory chemical composition table. Other alloys may also provide desired properties; consult with the
manufacturer for stainless steel alloy properties and availability. After adoption of Annex A5, a mandatory chemical composition requirements table will
be balloted in accordance with its requirements. This note and references to Specification A276/A276M will be simultaneously removed.
1.3 The requirements for introduction of new alloys into a mandatory chemical composition requirements table in this
specification are given in Annex A5.
1.4 Requirements for the relative deformation area of three-sided deformed bars are contained in Annex A4.
1.5 Bars are of twothree minimum yield strength levels, namely, 60 000 psi [420 MPa] and MPa], 75 000 psi [520 MPa], and
80 000 psi [550 MPa], designated as Grade 60 [420] and [420], Grade 75 [520], or Grade 80 [550], respectively.
1.6 Plain bars in sizes up to and including 2 in. [50.8 mm] in diameter in coils or cut lengths, when ordered, shall be furnished
under lengths are furnished in accordance with this specification in Grade 60 [420] and [420], Grade 75 [520], respectively.
Bending properties,and Grade 80 [550], respectively. Mechanical testing, when required, shall be by agreement between the
manufacturer and purchaser.to the nearest nominal deformed bar size. Requirements providing for deformations and marking shall
not be applicable to plain bars.
1.7 When stainless steel is to be welded, use a procedure suitable for the chemical composition and intended use or service.
NOTE 2—Welding of stainless steel reinforcement would occur after shipment from the producer. Structural welding should be performed in accordance
with the latest edition of AWS D1.6/D1.6M, any other internationally accepted stainless steel welding code, or a procedure suggested by the material
producer. AWS D1.6/D1.6M describes the proper selection of the filler metals, temperature control, as well as, performance, procedure qualification and
inspection requirements.
1.8 This specification is applicable for orders in either inch-pound units (as Specification A955) or in SI units (as Specification
A955M).
1.9 The values stated in either inch-pound or SI units are to be regarded separately as standard. Within the text, the SI units are
shown in brackets. The values stated in each system are not exact equivalents; therefore, each system shall be used independently
of the other. Combining values from the two systems may result in nonconformance with the standard.
1
This specification is under the jurisdiction of ASTM Committee A01 on Steel, Stainless Steel and Related Alloys and is the direct responsibility of Subcommitt
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