ASTM A1032-15
(Test Method)Standard Test Method for Hydrogen Embrittlement Resistance for Steel Wire Hard-Drawn Used for Prestressed Concrete Pipe
Standard Test Method for Hydrogen Embrittlement Resistance for Steel Wire Hard-Drawn Used for Prestressed Concrete Pipe
SIGNIFICANCE AND USE
4.1 Hard-drawn steel wire as used in prestressed concrete pipe may be exposed to elemental hydrogen favorable to hydrogen induced embrittlement and cracking. Resistance to hydrogen embrittlement is necessary for prestressing wire to provide long-term performance to installed pipe.
4.2 The length of time that a stressed wire specimen resists failure while exposed to a heated solution of NH4SCN, is an indication of the specimen's resistance to hydrogen embrittlement.
SCOPE
1.1 This test method describes procedures to determine the hydrogen embrittlement (HE) resistance of hard-drawn steel wire used for prestressed concrete pipe.
1.2 HE resistance is reported as time-to-failure of specimens tested in a laboratory.
1.3 The values stated in SI units are to be regarded as standard. The values given in parentheses are mathematical conversions to inch-pound units that are provided for information only and are not considered standard.
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 and health practices and determine the applicability of regulatory limitations prior to use.
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Designation: A1032 − 15
Standard Test Method for
Hydrogen Embrittlement Resistance for Steel Wire Hard-
1
Drawn Used for Prestressed Concrete Pipe
This standard is issued under the fixed designation A1032; 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* hydrogen induced embrittlement and cracking. Resistance to
hydrogen embrittlement is necessary for prestressing wire to
1.1 This test method describes procedures to determine the
provide long-term performance to installed pipe.
hydrogen embrittlement (HE) resistance of hard-drawn steel
wire used for prestressed concrete pipe. 4.2 The length of time that a stressed wire specimen resists
failure while exposed to a heated solution of NH SCN, is an
4
1.2 HEresistanceisreportedastime-to-failureofspecimens
indication of the specimen’s resistance to hydrogen embrittle-
tested in a laboratory.
ment.
1.3 The values stated in SI units are to be regarded as
5. Apparatus
standard. The values given in parentheses are mathematical
conversions to inch-pound units that are provided for informa-
5.1 Test Cell—The test cell shall contain the test solution
tion only and are not considered standard.
and the wire specimen and be constructed of material which is
inert to NH SCN (as shown in Fig. 1). The test cell shall be
1.4 This standard does not purport to address all of the 4
cylindrical with an inside diameter sufficient to provide a
safety concerns, if any, associated with its use. It is the
2 3 2
minimum of 5 mL of solution per 100 mm (2 in. per in.)of
responsibility of the user of this standard to establish appro-
wire specimen surface area in contact with the solution. The
priate safety and health practices and determine the applica-
test cell length shall allow the exposure of a minimum test
bility of regulatory limitations prior to use.
specimen length of 150 mm (6 in.) to the test solution. The test
2. Referenced Documents
cell shall be so designed that the wire specimen passes through
2
2.1 ASTM Standards: it and is sufficiently exposed outside the end of the cell as to
A648 Specification for Steel Wire, Hard-Drawn for Pre- allow application of a tensile force to the specimen.
stressed Concrete Pipe
5.2 Chronometer—A chronometer with a precision of at
D1193 Specification for Reagent Water
least 6 1 min. and capable of being stopped automatically on
fracture of the specimen shall be used.
3. Summary of Test Method
5.3 Tensile Force Frame—A closed stiff frame, in either
3.1 Characterization of HE resistance of hard-drawn steel
horizontal or vertical orientation, shall be used to position the
wire is accomplished by determining the time-to-failure of a
test cell such that a constant tensile force shall be applied to the
wire specimen under a maintained constant tensile force, while
test specimen and maintained. The tensile force shall be
immersed in a heated solution of ammonium thiocyanate
applied through use of a dead weight, or hydraulic loading
(NH SCN). The tensile force, the solution temperature, and
4
system equipped with a force indicator.
length of time in the test are continuously monitored.
6. Reagents and Materials
4. Significance and Use
6.1 Purity of Reagents—Reagent grade chemicals shall be
4.1 Hard-drawn steel wire as used in prestressed concrete
used in all tests. Unless otherwise indicated, it is intended that
pipe may be exposed to elemental hydrogen favorable to
all reagents conform to the specifications of the Committee on
Analytical Reagents of the American Chemical Society where
1
This test method is under the jurisdiction of ASTM Committee A01 on Steel,
Stainless Steel and Related Alloys and is the direct responsibility of Subcommittee such specifications are available. Other grades may be used,
A01.05 on Steel Reinforcement.
provided it is first ascertained that the reagent is of sufficiently
Current edition approved May 1, 2015. Published May 2015. Originally
high purity to permit its use without lessening the accuracy of
approved in 2004. Last previous edition approved in 2010 as A1032 – 04 (2010).
the determination.
DOI: 10.1520/A1032-15.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
6.2 Purity of Water—Unless otherwise indicated, references
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
to water shall be understood to mean reagent water as defined
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. by Type 4 of Specification D1193.
*A Summary of Changes section appears at the end of this standard
Copyright © ASTM International, 100
...
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: A1032 − 04 (Reapproved 2010) A1032 − 15
Standard Test Method for
Hydrogen Embrittlement Resistance for Steel Wire Hard
Drawn Hard-Drawn Used for PrestressingPrestressed
1
Concrete Pipe
This standard is issued under the fixed designation A1032; 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 Scope*
1.1 This test method describes procedures to determine the hydrogen embrittlement (HE) resistance of hard drawn hard-drawn
steel wire used for prestressingprestressed concrete pipe.
1.2 HE resistance is reported as time-to-failure of specimens tested in a laboratory.
1.3 The values stated in SI units are to be regarded as standard. The values given in parentheses are mathematical conversions
to inch-pound units that are provided for information only and are not considered standard.
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 and health practices and determine the applicability of regulatory
limitations prior to use.
2. Referenced Documents
2
2.1 ASTM Standards:
A648 Specification for Steel Wire, Hard-Drawn for Prestressed Concrete Pipe
D1193 Specification for Reagent Water
3. Summary of Test Method
3.1 Characterization of HE resistance of hard-drawn steel wire is accomplished by determining the time-to-failure of a wire
specimen under a maintained constant tensile force, while immersed in a heated solution of ammonium thiocyanate (NH SCN).
4
The load, tensile force, the solution temperature, and length of time in the test are continuously monitored.
4. Significance and Use
4.1 Hard-drawn steel wire as used in prestressingprestressed concrete pipe may be exposed to elemental hydrogen favorable to
hydrogen induced embrittlement and cracking. Resistance to hydrogen embrittlement is necessary for prestressing wire to provide
long-term performance to installed pipe.
4.2 The length of time that a stressed wire specimen resists failure while exposed to a heated solution of NH SCN, is an
4
indication of the specimen’s resistance to hydrogen embrittlement.
5. Apparatus
5.1 Test Cell—The test cell shall contain the test solution and the wire specimen and be constructed of material which is inert
to NH SCN (as shown in Fig. 1). The test cell shall be cylindrical with an inside diameter sufficient to provide a minimum of 5
4
2 3 2
mL of solution per 100 mm (2 in. per in. ) of wire specimen surface area in contact with the solution. The test cell length shall
allow the exposure of a minimum test samplespecimen length of 150 mm (6 in.) to the test solution. The test cell shall be so
designed that the wire specimen passes through it and is sufficiently exposed outside the end of the cell as to allow application of
a tensile force to the specimen.
1
This test method 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 May 1, 2010May 1, 2015. Published July 2010May 2015. Originally approved in 2004. Last previous edition approved in 20042010 as
A1032 – 04.A1032 – 04 (2010). DOI: 10.1520/A1032-04R10.10.1520/A1032-15.
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 Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
*A Summary 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
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A1032 − 15
FIG. 1 Test Cell
5.2 Chronometer—A chronometer with a precision of at least 6 1 min. and capable of being stopped automatically on fracture
of the samplespecimen shall be used.
5.3 Tensile Force Frame—A closed stiff frame, in either horizontal or vertical orientation, shall be employedused to position
the test cell such that a constant tensile force shall be applied to the test specimen and maintained. The tensile force shall be
accomplishedapplied through use of a dead weight, or hydraulic loading system equipped with a force indicator.
6.
...
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