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ASTM A955/A955M-12e1

(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.  
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 Requirements for the relative deformation area of three-sided deformed bars are contained in Annex A4.  
1.4 Bars are of two minimum yield strength levels, namely, 60 000 [420 MPa] and 75 000 psi [520 MPa], designated as Grade 60 [420] and Grade 75 [520], respectively.  
1.5 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 this specification in Grade 60 [420] and Grade 75 [520], respectively. Bending properties, when required, shall be by agreement between the manufacturer and purchaser. Requirements providing for deformations and marking shall not be applicable to plain bars.  
1.6 Weldability of most stainless steel compositions is generally good, however, pre-weld or post-weld procedures, or both, are necessary. Where material is to be welded, a welding procedure suitable for the chemical composition and intended use or service shall be used. Retesting of physical properties should be considered following welding procedures depending upon the steel composition and welding operation involved. Note 2—It is recommended that the user consult the manufacturer for information available from the Nickel Development Institute (NIDI) (Toronto, Canada).  
1.7 This specification is applicable for orders in either inch-pound units (as Specification A955) or in SI units (as Specification A955M).  
1.8 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.  
1.9 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.

General Information

Status
Historical
Publication Date
29-Feb-2012
ICS
77.140.60 - Steel bars and rods
Technical Committee
A01 - Steel, Stainless Steel and Related Alloys
Drafting Committee
A01.05 - Steel Reinforcement
Current Stage
Ref Project

Relations

Replaces
ASTM A955/A955M-12 - Standard Specification for Deformed and Plain Stainless-Steel Bars for Concrete Reinforcement
Effective Date
01-Mar-2012
Replaced By
ASTM A955/A955M-14 - Standard Specification for Deformed and Plain Stainless-Steel Bars for Concrete Reinforcement
Effective Date
01-Mar-2014

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ASTM A955/A955M-12e1 - Standard Specification for Deformed and Plain Stainless-Steel Bars for Concrete ReinforcementASTM A955/A955M-12e1 - Standard Specification for Deformed and Plain Stainless-Steel Bars for Concrete Reinforcement
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ASTM A955/A955M-12e1 - Standard Specification for Deformed and Plain Stainless-Steel Bars for Concrete Reinforcement
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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
´1
Designation: A955/A955M −12
StandardSpecification 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
ε NOTE—Editorial corrections were made to 23.3.4 in November 2012.
1. Scope* shallbebyagreementbetweenthemanufacturerandpurchaser.
Requirements providing for deformations and marking shall
1.1 This specification covers deformed and plain stainless-
not be applicable to plain bars.
steel bars for concrete reinforcement in cut lengths and coils
used in applications requiring resistance to corrosion or con- 1.6 Weldability of most stainless steel compositions is
trolled magnetic permeability. The standard sizes and dimen- generally good, however, pre-weld or post-weld procedures, or
sionsofdeformedbarsandtheirnumericaldesignationshallbe both, are necessary. Where material is to be welded, a welding
those listed in Table 1. The text of this specification references procedure suitable for the chemical composition and intended
notes and footnotes which provide explanatory material. These use or service shall be used. Retesting of physical properties
notesandfootnotes(excludingthoseintablesandfigures)shall should be considered following welding procedures depending
not be considered as requirements of the specification. upon the steel composition and welding operation involved.
1.1.1 Supplementary requirement (S1) of an optional nature
NOTE 2—It is recommended that the user consult the manufacturer for
isprovided.Itshallapplyonlywhenspecifiedbythepurchaser.
information available from the Nickel Development Institute (NIDI)
In order to obtain a controlled magnetic permeability product,
(Toronto, Canada).
steel conforming to Supplementary Requirement S1 should be
1.7 This specification is applicable for orders in either
ordered.
inch-pound units (as Specification A955) or in SI units (as
1.2 The chemical composition of the stainless steel alloy Specification A955M).
shall be selected for suitability to the application involved by
1.8 The values stated in either inch-pound or SI units are to
agreement between the manufacturer and the purchaser.This is
be regarded separately as standard.Within the text, the SI units
an important consideration in achieving the desired corrosion
are shown in brackets.The values stated in each system are not
resistance or controlled magnetic permeability, or both, be-
exact equivalents; therefore, each system shall be used inde-
cause these properties are not provided by all stainless steels.
pendentlyoftheother.Combiningvaluesfromthetwosystems
may result in nonconformance with the standard.
NOTE 1—The alloys shown in Table 2 have found the most use in North
America. Other alloys may also provide desired properties; consult with
1.9 This standard does not purport to address all of the
the manufacturer for stainless steel alloy properties and availability.
safety concerns, if any, associated with its use. It is the
1.3 Requirements for the relative deformation area of three-
responsibility of the user of this standard to establish appro-
sided deformed bars are contained in Annex A4.
priate safety and health practices and determine the applica-
bility of regulatory limitations prior to use.
1.4 Bars are of two minimum yield strength levels, namely,
60 000 [420 MPa] and 75 000 psi [520 MPa], designated as
2. Referenced Documents
Grade 60 [420] and Grade 75 [520], respectively.
2
2.1 ASTM Standards:
1.5 Plain bars in sizes up to and including 2 in. [50.8 mm]
A6/A6M Specification for General Requirements for Rolled
in diameter in coils or cut lengths, when ordered, shall be
Structural Steel Bars, Plates, Shapes, and Sheet Piling
furnished under this specification in Grade 60 [420] and Grade
A276 Specification for Stainless Steel Bars and Shapes
75 [520], respectively. Bending properties, when required,
A342/A342M Test Methods for Permeability of Feebly
Magnetic Materials
1
This specification is under the jurisdiction ofASTM Committee A01 on Steel,
Stainless Steel and Related Alloys and is the direct responsibility of Subcommittee
2
A01.05 on Steel Reinforcement. For referenced ASTM standards, visit the ASTM website, www.astm.org, or
Current edition approved March 1, 2012. Published April 2012. Originally contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
ε1
approved in 1996. Last previous edition approved in 2011 as A955/A955M – 11 . Standards volume information, refer to the standard’s Document Summary page on
DOI: 10.1520/A0955_A0955M-
...

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This specification covers hot-wrought merchant quality carbon steel bars and bar size shapes produced to mechanical property requirements and intended for noncritical constructional applications. The bars shall be available in round, square and hexagonal shapes. The steel shall be made by the open-hearth, basic-oxygen, or electric-furnace process. The specimens shall undergo a tension test to determine tensile strength, yield point and elongation. The merchant quality bars shall be from visible pipe; however, they may contain pronounced chemical segregation. Internal porosity, surface seams, and other surface irregularities may be present in this quality. The bars shall also be furnished as rolled and not pickled, blast cleaned, or oiled.
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SCOPE
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Rephosphorized and Resulfurized Carbon SteelE, G, H    
Designation  
Grade  
Carbon  
Manganese  
Phosphorus  
Sulfur  
Lead  
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SIGNIFICANCE AND USE
4.1 If the desired mechanical properties are as described in 5.1.1 for material identified as Classes P-1 through P-7, or in 5.1.2 for material identified as Classes Q-1 through Q-7, the strength level desired can be based on hardness or the equivalent tensile or yield strength as shown in Tables 1-4. If the desired mechanical properties are as set forth in 5.1.3 for material identified as Classes R-1 through R-6, the strength level is based on yield strength as shown in Tables 5 and 6.  
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FIG. 1 Locations in Typical Cross Sections of Steel Bars at Which Desired Properties Are Obtained  
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This specification covers hot-finished or cold-finished bars except bars for reforging. It includes rounds, squares, and hexagons, and hot-rolled or extruded shapes, such as angles, tees, and channels in the more commonly used types of stainless steels. The bars shall be furnished in one of the following conditions: Condition A in which the bars are annealed, Condition H in which the bars are hardened and tempered at a relative temperature, Condition T in which the bars are hardened and tempered at a relatively high temperature, Condition S in which the bars are strain hardened or relatively light cold worked, and Condition B in which the bars are relatively severe cold worked. The material shall be subjected to a mechanical test to determine its tensile strength, yield strength, elongation, and Brinell hardness.
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1.1 This specification covers hot-finished or cold-finished bars except bars for reforging (Note 1). It includes rounds, squares, and hexagons, and hot-rolled or extruded shapes, such as angles, tees, and channels in the more commonly used types of stainless steels. The free-machining types (Note 2) for general corrosion resistance and high-temperature service are covered in a separate specification.  
Note 1: For bars for reforging, see Specification A314.
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Standard Specification for General Requirements for Steel Bars, Carbon and Alloy, Hot-Wrought

ABSTRACT
This guide covers a group of requirements for carbon and alloy steel bars under each of the following specifications: hot-rolled carbon steel bars, cold-finished carbon steel bars, hot-rolled alloy steel bars, and cold-finished alloy steel bars. Heat and product analysis shall be performed on several grades of carbon steel bars, wherein the material shall conform to the required chemical composition for carbon, manganese, phosphorus, and sulfur. Several grades of alloy steel bars shall also undergo heat and product analysis and shall meet the required chemical composition for carbon, manganese, phosphorus, sulfur, silicon, nickel, chromium, and molybdenum. When compositions other than those indicated in the specified chemical components are required, the composition limits shall be prepared using the specified ranges and limits for carbon steel and alloy steel. The material shall undergo grain size test and shall conform to the specified grain size requirement. Mechanical tests shall also be performed on the steel test specimens.
SCOPE
1.1 This specification2 covers a group of common requirements which, unless otherwise specified in the purchase order or in an individual specification, shall apply to carbon and alloy steel bars under each of the following ASTM specifications (or under any other ASTM specification which invokes this specification or portions thereof):    
Title of Specification  
ASTM
DesignationA  
Hot-Rolled Carbon Steel Bars:  
Steel Bars, Carbon, Quenched and Tempered  
A321    
Steel Bars and Shapes, Carbon Rolled from “T'' Rails  
A499    
Steel Bars, Carbon, Merchant Quality, M-Grades  
A575    
Steel Bars, Carbon, Hot-Wrought, Special Quality  
A576    
Steel Bars, Carbon, Merchant Quality, Mechanical Properties  
A663/A663M    
Steel Bars, Carbon, Hot-Wrought, Special Quality, Mechanical Properties  
A675/A675M    
Carbon and Alloy Steel Bars for Springs  
A689    
Cold-Finished Carbon Steel Bars:  
Steel Bar, Carbon and Alloy, Cold-Finished  
A108    
Cold-Drawn Stress-Relieved Carbon Steel Bars Subject to Mechanical Property Requirements  
A311/A311M  
Hot-Rolled Alloy Steel Bars:  
Steel Bars, Alloy, Standard Grades  
A322    
Carbon and Alloy Steel Bars Subject to End-Quench Hardenability Requirements  
A304    
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A434/A434M    
Steel Bars, Alloy, Hot-Wrought, for Elevated Temperature or Pressure-Containing Parts, or Both  
A739    
Cold-Finished Alloy Steel Bars:  
Steel Bars, Alloy, Hot-Rolled or Cold-Finished, Quenched and Tempered  
A434/A434M    
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A696    
A These designations refer to the latest issue of the respective specifications, which appear either in the Annual Book of ASTM Standards, Vol 01.05, or as reprints obtainable from ASTM.  
1.2 In case of any conflict in requirements, the requirements of the purchase order, the individual material specification, and this general specification shall prevail in the sequence named.  
1.3 The values stated in either inch-pound units or SI units are to be regarded separately as standard. The values stated in each system are not necessarily exact equivalents; therefore, to ensure conformance with the standard, each system shall used independently of the other, and values from the two systems shall not be combined.  
1.4 For purposes of determining conformance to this specification and the various material specifications referenced in 1.1, dimensional 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.
Note 1: Specification A29/A29M previously listed dimensional tolerances for cold-finished bars; these are now found in Spe...

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Standard Specification for Precipitation Hardening Iron Base Superalloy Bars, Forgings, and Forging Stock for High-Temperature Service

ABSTRACT
This specification covers hot-finished or cold-finished precipitation hardening iron base superalloy bars, forgings, and forging stock for high-temperature service. The mechanical properties of these alloys are developed by suitable solution treating and precipitation hardening treatments. Two grades of iron base alloy are covered; Grade 660 and Grade 662 (bars and forgings). The material shall meet the requirements as to stress rupture properties specified. The material shall conform to the chemical, mechanical, and metallurgical properties requirements specified.
SCOPE
1.1 This specification2 covers hot-finished or cold-finished precipitation hardening iron base superalloy bars, forgings, and forging stock for high-temperature service. The mechanical properties of these alloys are developed by suitable solution treating and precipitation hardening treatments.  
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1.3 The values stated in either SI units or inch-pound units are to be regarded separately as standard. SI units are shown in brackets. The values stated in each system are not necessarily exact equivalents; therefore, to ensure conformance with the standard, each system shall be used independently of the other, and values from the two systems shall not be combined.  
1.4 Unless the order specifies an “M” designation, the material shall be furnished to inch-pound units.  
1.5 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

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ASTM
ASTM A950/A950M-11(2023)(Specification)
Standard Specification for Fusion-Bonded Epoxy-Coated Structural Steel H-Piles and Sheet Piling

ABSTRACT
This specification covers the qualification requirements for structural steel H-piles and sheet piling with protective fusion-bonded epoxy coating applied by electrostatic spraying, flocking, or fluidized bed processing. Surface preparation techniques shall be performed by abrasive blast cleaning, grinding and chemical washing prior to coating application. The powder coating shall be heat treated and cured before visible oxidation occurs. Coating materials shall undergo thickness measurements and bend testing, and shall conform to the requirements for film thickness, flexibility and continuity, impact resistance, chemical composition, and corrosion resistance. The coated H-piles or sheet piling shall be stored off of the ground on supports. While handling equipment, bundling bands for packaging and tie-down bands for shipping shall have padded contact areas so as to avoid damage and excessive deflection.
SCOPE
1.1 This specification covers structural steel H-piles and sheet piling with protective fusion-bonded epoxy coating applied by the electrostatic spray, flocking, or fluidized bed process.  
Note 1: The coating applicator is identified throughout this specification as the manufacturer.  
1.2 Requirements for coatings are contained in Annex A1.  
1.3 This specification is applicable for orders in either inch-pound units (as Specification A950) or SI units (as Specification A950M). 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.  
1.4 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, health, and environmental practices and determine the applicability of regulatory limitations prior to use.  
1.5 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

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ASTM
ASTM A582/A582M-22(Specification)
Standard Specification for Free-Machining Stainless Steel Bars

ABSTRACT
This specification covers hot-finished or cold-finished bars, except bars for forging, suitable for machining processes. It includes rounds, squares, and hexagons in the more commonly used types of stainless free-machining steels designed especially for optimum machinability and for general corrosion and high-temperature service. Bars may be furnished either hot finished or cold finished in one of the conditions specified. Materials shall adhere to specified chemical composition requirements. At least one hardness testing shall be made midway between surface and center on each lot to determine that the material conforms to hardness requirements. Also, test methods and definition for hardness testing are presented.
SCOPE
1.1 This specification covers hot-finished or cold-finished bars, except bars for forging (Note 1), suitable for machining processes. It includes rounds, squares, and hexagons in the more commonly used types of stainless free-machining steels designed especially for optimum machinability and for general corrosion and high-temperature service. Stainless steel bars other than the free-machining types are covered in a separate specification (Note 2).  
1.2 This specification is expressed in both inch-pound units and in SI units; however, unless the purchase order or contract specifies the applicable M specification designation (SI units), the inch-pound units shall apply. The values stated in either inch-pound units or SI (metric) units are to be regarded separately as standard: within the text and tables, the SI units are shown in [brackets]. 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 nonconformance with the specification.
Note 1: For bars for reforging, see Specification A314.  
Note 2: For non-free machining stainless bars, see Specification A276.  
1.3 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

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