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ASTM F2328M-05

(Test Method)

Standard Test Method for Determining Decarburization and Carburization in Hardened and Tempered Threaded Steel Bolts, Screws and Studs [Metric]

Standard Test Method for Determining Decarburization and Carburization in Hardened and Tempered Threaded Steel Bolts, Screws and Studs [Metric]

SCOPE
1.1 This test method covers procedures for measuring, classifying, and determining the presence of decarburization and carburization in the threaded section of hardened and tempered metric steel bolts, screws, studs, and similar parts which have been heated to facilitate fabrication or to modify its mechanical properties. This test method is not intended to address products which are intentionally carburized to achieve specific results.
1.2 Two routine methods are described for measuring the limits of and determining the presence of decarburization or carburization; the Optical Method and the Microindentation Method 1. Either method is appropriate for routine examinations. The Microindentation Method 2 shall be considered the referee method.
1.3 For the purpose of these tests, there are three classes of hardened and tempered steel products for which specific measurements must be made with respect to their physical properties.
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.

General Information

Status
Historical
Publication Date
14-Jun-2005
ICS
21.060.01 - Fasteners in general
77.140.20 - Stainless steels
Technical Committee
F16 - Fasteners
Drafting Committee
F16.01 - Test Methods
Current Stage
Ref Project

Relations

Replaces
ASTM F2328M-04 - Standard Test Method for Determining Decarburization and Carburization in Hardened and Tempered Threaded Steel Bolts, Screws and Studs [Metric]
Effective Date
15-Jun-2005
Replaced By
ASTM F2328M-06 - Standard Test Method for Determining Decarburization and Carburization in Hardened and Tempered Threaded Steel Bolts, Screws and Studs [Metric]
Effective Date
01-Jun-2006
Referred By
ASTM F606/F606M-21 - Standard Test Methods for Determining the Mechanical Properties of Externally and Internally Threaded Fasteners, Washers, Direct Tension Indicators, and Rivets
Effective Date
15-Jun-2005
Referred By
ASTM A962/A962M-23a - Standard Specification for Common Requirements for Bolting Intended for Use at Any Temperature from Cryogenic to the Creep Range
Effective Date
15-Jun-2005
Referred By
ASTM F3125/F3125M-22 - Standard Specification for High Strength Structural Bolts and Assemblies, Steel and Alloy Steel, Heat Treated, Inch Dimensions 120 ksi and 150 ksi Minimum Tensile Strength, and Metric Dimensions 830 MPa and 1040 MPa Minimum Tensile Strength
Effective Date
15-Jun-2005
Referred By
ASTM F2882/F2882M-17 - Standard Specification for Screws, Alloy Steel, Heat Treated, 170 ksi and 1170 MPa Minimum Tensile Strength (Inch and Metric)
Effective Date
15-Jun-2005

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ASTM F2328M-05 - Standard Test Method for Determining Decarburization and Carburization in Hardened and Tempered Threaded Steel Bolts, Screws and Studs [Metric]ASTM F2328M-05 - Standard Test Method for Determining Decarburization and Carburization in Hardened and Tempered Threaded Steel Bolts, Screws and Studs [Metric]
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ASTM F2328M-05 - Standard Test Method for Determining Decarburization and Carburization in Hardened and Tempered Threaded Steel Bolts, Screws and Studs [Metric]
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Standards Content (Sample)

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
Designation: F 2328M – 05
METRIC
Standard Test Method for
Determining Decarburization and Carburization in Hardened
and Tempered Threaded Steel Bolts, Screws and Studs
1
[Metric]
This standard is issued under the fixed designation F 2328M; 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 F 1789 Terminology for F16 Mechanical Fasteners
1.1 This test method covers procedures for measuring,
3. Terminology
classifying, and determining the presence of decarburization
3.1 Definitions:
and carburization in the threaded section of hardened and
3.1.1 carburization—process or result of increasing the
tempered metric steel bolts, screws, studs, and similar parts
carbon content of the surface layers of the steel fastener
whichhavebeenheatedtofacilitatefabricationortomodifyits
product.
mechanical properties. This test method is not intended to
3.1.2 decarburization—in accordance with Terminology
address products which are intentionally carburized to achieve
F 1789, is a loss of carbon from the surface layer of the
specific results.
fastener, normally associated with heat treatment.
1.2 Two routine methods are described for measuring the
3.1.3 gross decarburization—also known as complete de-
limits of and determining the presence of decarburization or
carburization, is characterized by a sufficient carbon loss to
carburization; the Optical Method and the Microindentation
show only clearly defined ferrite grains.
Method 1. Either method is appropriate for routine examina-
3.1.4 partial decarburization—characterized as a loss of
tions. The Microindentation Method 2 shall be considered the
carbon sufficient to cause a lighter shade of tempered marten-
referee method.
site than that of the immediately adjacent base metal, but as
1.3 For the purpose of these tests, there are three classes of
being of insufficient carbon loss to show clearly defined ferrite
hardened and tempered steel products for which specific
grains.
measurements must be made with respect to their physical
properties.
4. Significance and Use
1.4 This standard does not purport to address all of the
4.1 Decarburization and carburization are two surface con-
safety concerns, if any, associated with its use. It is the
ditions created, either intentionally or unintenionally, as with a
responsibility of the user of this standard to establish appro-
pre-existing condition created during the rod rolling process,
priate safety and health practices and determine the applica-
the rod/wire annealing process, or while heat treating threaded
bility of regulatory limitations prior to use.
steel products. Too much of either will adversely affect the
2. Referenced Documents safety and performance of the threaded product. Therefore,
2 limits have been established for three different product groups:
2.1 ASTM Standards:
the harder and greater the tensile strength of the product, the
E3 Practice for Preparation of Metallographic Specimens
more susceptible to failure the product becomes if these limits
E 384 Test Method for Microindentation Hardness of Ma-
are exceeded.
terials
4.2 When testing to a particular product specification that
lists the dimensions and microindentation data to be used, that
data shall take precedence over the tables in this test method.
1
This test method is under the jurisdiction of ASTM Committee F16 on
4.3 There are only two viable methods available to detect
Fasteners and is the direct responsibility of Subcommittee F16.01 on Test Methods.
these deficiencies: either by the visual method or the microin-
Current edition approved June 15, 2005. Published June 2005. Originally
approved in 2004. Last previous edition approved in 2004 as F 2328M – 04.
dentation method. Both methods are used for routine inspec-
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
tionswhenevaluationsareconductedatasinglelocationonthe
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
product sample. Because an evaluation at a specific location
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. maynotberepresentativeofthewholepart,therefereemethod
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
1

---------------------- Page: 1 ----------------------
F 2328M – 05
employs the microindentation method taken as an average of 7.2.2 Allowablelimitsforgrossdecarburization(G)shallbe
evaluationsconductedonfouradjacentthreads.Thisprocedure in accordance with 3.1.3 and the measured values as defined in
significantly re
...

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Standard Test Method for Determining Decarburization and Carburization in Hardened and Tempered Threaded Steel Bolts, Screws, Studs, and Nuts

SIGNIFICANCE AND USE
4.1 Decarburization and carburization are two surface conditions created, either intentionally or unintentionally, as with a pre-existing condition created during the rod rolling process, the rod/wire annealing process, or while heat treating threaded steel products. Too much of either will adversely affect the safety and performance of the threaded product. Therefore, limits have been established for three different product groups: the harder and greater the tensile strength of the product, the more susceptible to failure the product becomes if these limits are exceeded.  
4.2 When testing to a particular product specification that lists the dimensions and microindentation data to be used, that data shall take precedence over the tables in this test method.  
4.3 There are only two viable methods available to detect these deficiencies, either by the visual method or the microindentation method. Both methods are used for routine inspections when evaluations are conducted at a single location on the product sample.  
4.3.1 Because an evaluation at a specific location may not be representative of the whole part, the referee method employs the microindentation method taken as an average of evaluations conducted on four adjacent threads. This procedure significantly reduces the random test variables when compared to testing on a single thread.  
4.4 Specifying this test method does not specify or imply that testing shall be for either decarburization or carburization alone or for both conditions. When either test method is performed, both conditions will be apparent and shall be reported. For example, if an order is placed to test for decarburization and none is found, but the presence of carburization is detected, it shall be reported on the test report that carburization was found.
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1.1 This test method covers procedures for measuring, classifying, and determining the presence of decarburization and carburization in the threaded section of hardened and tempered inch series steel bolts, screws, studs, nuts, and similar parts which have been heated to facilitate fabrication or to modify their mechanical properties. This test method is not intended to address products which are intentionally carburized to achieve specific results.  
1.2 Two routine methods are described for measuring the limits of and determining the presence of decarburization or carburization—the optical method and the microindentation method 1. Either method is appropriate for routine examinations. The microindentation method 2 shall be considered the referee method.  
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1.4 The values stated in inch-pound units are to be regarded as standard. No other units of measurement are included in this standard.  
1.5 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.  
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SIGNIFICANCE AND USE
4.1 Decarburization and carburization are two surface conditions created, either intentionally or unintentionally, as with a pre-existing condition created during the rod rolling process, the rod/wire annealing process, or while heat treating threaded steel products. Too much of either will adversely affect the safety and performance of the threaded product. Therefore, limits have been established for four different product groups: the harder and greater the tensile strength of the product, the more susceptible to failure the product becomes if these limits are exceeded.  
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1.1 This test method covers procedures for measuring, classifying, and determining the presence of decarburization and carburization in the threaded section of hardened and tempered metric steel bolts, screws, studs, nuts and similar parts which have been heated to facilitate fabrication or to modify their mechanical properties. This test method is not intended to address products which are intentionally carburized to achieve specific results.  
1.2 Two routine methods are described for measuring the limits of and determining the presence of decarburization or carburization; the Optical Method and the Microindentation Method 1. Either method is appropriate for routine examinations. The Microindentation Method 2 shall be considered the referee method.  
1.3 For the purpose of these tests, there are five classes of hardened and tempered steel products for which specific measurements must be made with respect to their physical properties.  
1.4 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.  
1.5 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.  
1.6 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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SIGNIFICANCE AND USE
4.1 Decarburization and carburization are two surface conditions created, either intentionally or unintentionally, as with a pre-existing condition created during the rod rolling process, the rod/wire annealing process, or while heat treating threaded steel products. Too much of either will adversely affect the safety and performance of the threaded product. Therefore, limits have been established for three different product groups: the harder and greater the tensile strength of the product, the more susceptible to failure the product becomes if these limits are exceeded.  
4.2 When testing to a particular product specification that lists the dimensions and microindentation data to be used, that data shall take precedence over the tables in this test method.  
4.3 There are only two viable methods available to detect these deficiencies, either by the visual method or the microindentation method. Both methods are used for routine inspections when evaluations are conducted at a single location on the product sample.  
4.3.1 Because an evaluation at a specific location may not be representative of the whole part, the referee method employs the microindentation method taken as an average of evaluations conducted on four adjacent threads. This procedure significantly reduces the random test variables when compared to testing on a single thread.  
4.4 Specifying this test method does not specify or imply that testing shall be for either decarburization or carburization alone or for both conditions. When either test method is performed, both conditions will be apparent and shall be reported. For example, if an order is placed to test for decarburization and none is found, but the presence of carburization is detected, it shall be reported on the test report that carburization was found.
SCOPE
1.1 This test method covers procedures for measuring, classifying, and determining the presence of decarburization and carburization in the threaded section of hardened and tempered inch series steel bolts, screws, studs, nuts, and similar parts which have been heated to facilitate fabrication or to modify their mechanical properties. This test method is not intended to address products which are intentionally carburized to achieve specific results.  
1.2 Two routine methods are described for measuring the limits of and determining the presence of decarburization or carburization—the optical method and the microindentation method 1. Either method is appropriate for routine examinations. The microindentation method 2 shall be considered the referee method.  
1.3 For the purpose of these tests, there are four classes of hardened and tempered steel products for which specific measurements must be made with respect to their physical properties.  
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4.1 Decarburization and carburization are two surface conditions created, either intentionally or unintentionally, as with a pre-existing condition created during the rod rolling process, the rod/wire annealing process, or while heat treating threaded steel products. Too much of either will adversely affect the safety and performance of the threaded product. Therefore, limits have been established for four different product groups: the harder and greater the tensile strength of the product, the more susceptible to failure the product becomes if these limits are exceeded.  
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    sale 15% off
  • Guide
    4 pages
    English language
    sale 15% off