ASTM A955/A955M-19
(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.
1.1.1 A supplementary requirement (S1) is provided for use where a controlled magnetic permeability product is required by the purchaser. Supplementary requirement (S1) applies only when specified in the purchase order.
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.
1.3 Corrosion Resistance requirements are contained in Section 11 and Annex A1 and the test procedures options are Annex A2 (Rapid Macrocell Test) or Annex A3 (Cracked Beam Test).
1.4 The requirements for introduction of new alloys into a mandatory chemical composition requirements table in this specification are given in Annex A5.
1.5 Requirements for the relative deformation area of three-sided deformed bars are contained in Annex A4.
1.6 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.
1.7 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.
1.8 When stainless steel is to be welded, use a procedure suitable for the chemical composition and intended use or service.
Note 1: Welding of stainless steel reinforcement would occur after shipment from the manufacturer. 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 manufacturer. AWS D1.6/D1.6M describes the proper selection of the filler metals, temperature control, as well as, performance, procedure qualification and inspection requirements.
1.9 This specification is applicable for orders in either inch-pound units (as Specification A955) or in SI units (as Specification A955M).
1.10 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.
1.11 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 may not be exact equivalents; therefore, each system shall be ...
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Designation: A955/A955M −19
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* with this specification in Grade 60 [420], Grade 75 [520], and
Grade 80 [550], respectively. Mechanical testing, when
1.1 This specification covers deformed and plain stainless
required, shall be to the nearest nominal deformed bar size.
steel bars for concrete reinforcement in cut lengths and coils
Requirements providing for deformations and marking shall
used in applications requiring resistance to corrosion or con-
not be applicable to plain bars.
trolled magnetic permeability. The standard sizes and dimen-
sionsofdeformedbarsandtheirnumericaldesignationshallbe 1.8 When stainless steel is to be welded, use a procedure
those listed in Table 1. suitable for the chemical composition and intended use or
1.1.1 Asupplementary requirement (S1) is provided for use service.
where a controlled magnetic permeability product is required
NOTE 1—Welding of stainless steel reinforcement would occur after
by the purchaser. Supplementary requirement (S1) applies only
shipment from the manufacturer. Structural welding should be performed
when specified in the purchase order. in accordance with the latest edition of AWS D1.6/D1.6M, any other
internationally accepted stainless steel welding code, or a procedure
1.2 The chemical composition of the stainless steel alloy
suggested by the material manufacturer. AWS D1.6/D1.6M describes the
shall be selected for suitability to the application involved by
proper selection of the filler metals, temperature control, as well as,
agreement between the manufacturer and the purchaser.This is performance, procedure qualification and inspection requirements.
an important consideration in achieving the desired corrosion
1.9 This specification is applicable for orders in either
resistance or controlled magnetic permeability, or both, be-
inch-pound units (as Specification A955) or in SI units (as
cause these properties are not provided by all stainless steels.
Specification A955M).
1.3 Corrosion Resistance requirements are contained in
1.10 The text of this specification references notes and
Section 11 and Annex A1 and the test procedures options are
footnotes which provide explanatory material. These notes and
Annex A2 (Rapid Macrocell Test) or Annex A3 (Cracked
footnotes (excluding those in tables and figures) shall not be
Beam Test).
considered as requirements of the specification.
1.4 The requirements for introduction of new alloys into a
1.11 Thevaluesstatedineitherinch-poundorSIunitsareto
mandatory chemical composition requirements table in this
be regarded separately as standard.Within the text, the SI units
specification are given in Annex A5.
are shown in brackets. The values stated in each system may
not be exact equivalents; therefore, each system shall be used
1.5 Requirements for the relative deformation area of three-
independently of the other. Combining values from the two
sided deformed bars are contained in Annex A4.
systems may result in nonconformance with the specification.
1.6 Barsareofthreeminimumyieldstrengthlevels,namely,
1.12 This specification does not purport to address all of the
60 000 psi [420 MPa], 75 000 psi [520 MPa], and 80 000 psi
safety concerns, if any, associated with its use. It is the
[550 MPa], designated as Grade 60 [420], Grade 75 [520], or
responsibility of the user of this specification to establish
Grade 80 [550], respectively.
appropriate safety, health, and environmental practices and
1.7 Plain bars in sizes up to and including 2 in. [50.8 mm]
determine the applicability of regulatory limitations prior to
in diameter in coils or cut lengths are furnished in accordance
use.
1.13 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 on Steel Reinforcement.
Development of International Standards, Guides and Recom-
Current edition approved May 15, 2019. Published May 2019. Originally
mendations issued by the World Trade Organization Technical
approved in 1996. Last previous edition approved in 2018 as A955/A955M – 18b.
DOI: 10.1520/A0955_A0955M-19. Barriers to Trade (TBT) Committee.
*A Summary of Changes section appears at the end
...
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 − 18b A955/A955M − 19
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 A supplementary requirement (S1) of an optional nature is provided. It shall apply only when specified by
the purchaser. In order to obtain is provided for use where a controlled magnetic permeability product, steel conforming to
Supplementary Requirement S1 should be ordered. product is required by the purchaser. Supplementary requirement (S1) applies
only when specified in the purchase order.
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 Corrosion Resistance requirements are contained in Section 11 and Annex A1 and the test procedures options are Annex
A2 (Rapid Macrocell Test) or Annex A3 (Cracked Beam Test).
1.4 The requirements for introduction of new alloys into a mandatory chemical composition requirements table in this
specification are given in Annex A5.
1.5 Requirements for the relative deformation area of three-sided deformed bars are contained in Annex A4.
1.6 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.
1.7 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.
1.8 When stainless steel is to be welded, use a procedure suitable for the chemical composition and intended use or service.
NOTE 1—Welding of stainless steel reinforcement would occur after shipment from the producer.manufacturer. 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.manufacturer. AWS D1.6/D1.6M describes the proper selection of the filler metals, temperature control, as well as, performance,
procedure qualification and inspection requirements.
1.9 This specification is applicable for orders in either inch-pound units (as Specification A955) or in SI units (as Specification
A955M).
1
This specification is under the jurisdiction of ASTM Committee A01 on Steel, Stainless Steel and Related Alloys and is the direct responsibility of Subcommittee A01.05
on Steel Reinforcement.
Current edition approved Nov. 15, 2018May 15, 2019. Published December 2018May 2019. Originally approved in 1996. Last previou
...
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