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ASTM E1077-91(1997)

(Test Method)

Standard Test Methods for Estimating the Depth of Decarburization of Steel Specimens

Standard Test Methods for Estimating the Depth of Decarburization of Steel Specimens

SCOPE
1.1 These test methods cover procedures for estimating the depth of decarburization of steels irrespective of the composition, matrix microstructure, or section shape. The following basic procedures may be used:  
1.1.1 Screening methods.  
1.1.2 Microscopical methods.  
1.1.3 Microindentation hardness methods.  
1.1.4 Chemical analysis methods.  
1.2 In case of a dispute, the rigorous quantitative or lineal analysis method (see 7.3.5 and 7.3.6) shall be the referee method. These methods can be employed with any cross-sectional shape. The chemical analytical methods generally reveal a greater depth of decarburization than the microscopical methods but are limited to certain simple shapes and by availability of equipment. These techniques are generally reserved for research studies. The microindentation hardness method is suitable for accurate measurements of hardened structures with relatively homogeneous microstructures.  
1.3 The values stated in SI units are to be regarded as standard. The inch-pound equivalents are in parentheses and may be approximate.  
1.4 This standard does not purport to address all of the safety problems, 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
09-Mar-2001
ICS
77.080.20 - Steels
Technical Committee
E04 - Metallography
Drafting Committee
E04.14 - Quantitative Metallography
Current Stage
Ref Project

Relations

Replaced By
ASTM E1077-01 - Standard Test Methods for Estimating the Depth of Decarburization of Steel Specimens
Effective Date
10-Mar-2001

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ASTM E1077-91(1997) - Standard Test Methods for Estimating the Depth of Decarburization of Steel SpecimensASTM E1077-91(1997) - Standard Test Methods for Estimating the Depth of Decarburization of Steel Specimens
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ASTM E1077-91(1997) - Standard Test Methods for Estimating the Depth of Decarburization of Steel Specimens
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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
Designation:E1077–91(Reapproved 1997)
Standard Test Methods for
Estimating the Depth of Decarburization of Steel
1
Specimens
This standard is issued under the fixed designation E 1077; 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 (ε) indicates an editorial change since the last revision or reapproval.
This standard has been approved for use by agencies of the Department of Defense.
INTRODUCTION
These test methods may be used to estimate the average or greatest depth of decarburization in
hardened or non-hardened steel products. The test methods described range from simple screening
tests to more statistically rigorous test methods depending upon the needs of the investigation.
1. Scope 2. Referenced Documents
1.1 These test methods cover procedures for estimating the 2.1 ASTM Standards:
2
depth of decarburization of steels irrespective of the composi- A 919 Terminology Relating to Heat Treatment of Metals
3
tion, matrix microstructure, or section shape. The following E 3 Practice for Preparation of Metallographic Specimens
3
basic procedures may be used: E 7 Terminology Relating to Metallography
3
1.1.1 Screening methods. E 340 Test Method for Macroetching Metals and Alloys
1.1.2 Microscopical methods. E 350 Test Methods for ChemicalAnalysis of Carbon Steel,
1.1.3 Microindentation hardness methods. Low-Alloy Steel, Silicon Electrical Steel, Ingot Iron, and
4
1.1.4 Chemical analysis methods. Wrought Iron
3
1.2 In case of a dispute, the rigorous quantitative or lineal E 384 Test Method for Microhardness of Materials
3
analysis method (see 7.3.5 and 7.3.6) shall be the referee E 407 Practice for Microetching Metals and Alloys
method. These methods can be employed with any cross- E 415 Test Method for Optical Emission Vacuum Spectro-
5
sectional shape. The chemical analytical methods generally metric Analysis of Carbon and Low-Alloy Steel
reveal a greater depth of decarburization than the microscopi-
3. Terminology
cal methods but are limited to certain simple shapes and by
3.1 Definitions:
availability of equipment. These techniques are generally
3.1.1 Fordefinitionsoftermsusedinthesetestmethods,see
reserved for research studies. The microindentation hardness
Terminology E 7 and Definitions E 44.
method is suitable for accurate measurements of hardened
3.2 Definitions of Terms Specific to This Standard:
structures with relatively homogeneous microstructures.
3.2.1 average depth of decarburization—the mean value of
1.3 The values stated in SI units are to be regarded as
five or more measurements of the total depth of decarburiza-
standard. The inch-pound equivalents are in parentheses and
tion.
may be approximate.
3.2.2 average free-ferrite depth—the mean value of five or
1.4 This standard does not purport to address all of the
more measurements of the depth of complete decarburization.
safety concerns, if any, associated with its use. It is the
3.2.3 complete decarburization—loss of carbon content at
responsibility of the user of this standard to establish appro-
the surface of a steel specimen to a level below the solubility
priate safety and health practices and determine the applica-
limit of carbon in ferrite so that only ferrite is present.
bility of regulatory limitations prior to use.
1
These test methods are under the jurisdiction of ASTM Committee E-4 on
2
Metallography and are the direct responsibility of Subcommittee E04.14 on Annual Book of ASTM Standards, Vol 01.02.
3
Quantitative Metallography. Annual Book of ASTM Standards, Vol 03.01.
4
Current edition approved Aug. 15, 1991. Published October 1991. Originally Annual Book of ASTM Standards, Vol 03.05.
ε1 5
published as E 1077 – 85. Last previous edition E 1077 – 85. Annual Book of ASTM Standards, Vol 03.06.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
1

---------------------- Page: 1 ----------------------
E1077–91 (1997)
3.2.4 free-ferrite depth—the perpendicular distance from 6. Sampling
the surface of the specimen to that location where the structure
6.1 Samples should be taken at locations that are represen-
is no longer fully ferritic, that is, other transformation products
tative of the bulk specimen. The location and number of
are observed.
samplestakendependsonthenatureofthematerialtobetested
and will be defined upon agreements between manufacturer
NOTE 1—The term free ferrite has also been used to describe globular,
isolated grains of proeutectoid ferrite in the microstructure of medium-
and purchaser.
carbon hypoeutectoid steels.
6.2 Specimens for screening tests using bulk hardness tests,
such as the Rockwell test, should be sm
...

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ASTM E975-22(Test Method)
Standard Test Method for X-Ray Determination of Retained Austenite in Steel with Near Random Crystallographic Orientation

SIGNIFICANCE AND USE
2.1 Significance—Retained austenite with a near random crystallographic orientation is found in the microstructure of heat-treated low-alloy, high-strength steels that have medium (0.40 weight %) or higher carbon contents. Although the presence of retained austenite may not be evident in the microstructure, and may not affect the bulk mechanical properties such as hardness of the steel, the transformation of retained austenite to martensite during service can affect the performance of the steel.  
2.2 Use—The measurement of retained austenite can be included in low-alloy steel development programs to determine its effect on mechanical properties. Retained austenite can be measured on a companion specimen or test section that is included in a heat-treated lot of steel as part of a quality control practice. The measurement of retained austenite in steels from service can be included in studies of material performance.
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1.1 This test method covers the determination of retained austenite phase in steel using integrated intensities (area under peak above background) of X-ray diffraction peaks using chromium  Kα  or molybdenum Kα  X-radiation.  
1.2 The method applies to carbon and alloy steels with near random crystallographic orientations of both ferrite and austenite phases.  
1.3 This test method is valid for retained austenite contents from 1 % by volume and above.  
1.4 If possible, X-ray diffraction peak interference from other crystalline phases such as carbides should be eliminated from the ferrite and austenite peak intensities.  
1.5 Substantial alloy contents in steel cause some change in peak intensities which have not been considered in this method. Application of this method to steels with total alloy contents exceeding 15 weight % should be done with care. If necessary, the users can calculate the theoretical correction factors to account for changes in volume of the unit cells for austenite and ferrite resulting from variations in chemical composition.  
1.6 Units—The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.  
1.7 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.  
1.8 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 E1077-14(2021)(Test Method)
Standard Test Methods for Estimating the Depth of Decarburization of Steel Specimens

SIGNIFICANCE AND USE
5.1 These test methods are used to detect surface losses in carbon content due to heating at elevated temperatures, as in hot working or heat treatment.  
5.2 Results of such tests may be used to qualify material for shipment according to agreed upon guidelines between purchaser and manufacturer, for guidance as to machining allowances, or to assess the influence of processing upon decarburization tendency.  
5.3 Screening tests are simple, fast, low-cost tests designed to separate non-decarburized samples from those with appreciable decarburization. Based on the results of such tests, the other procedures may be utilized as applicable.  
5.4 Microscopical tests require a metallographically polished cross section to permit reasonably accurate determination of the depth and nature of the decarburization present. Several methods may be employed for estimation of the depth of decarburization. The statistical accuracy of each varies with the amount of effort expended.  
5.5 Microindentation hardness methods are employed on polished cross sections and are most suitable for hardened specimens with reasonably uniform microstructures. This procedure can be used to define the depth to a specific minimum hardness or the depth to a uniform hardness.  
5.6 Chemical analytical methods are limited to specimens with simple, uniform shapes and are based on analysis of incremental turnings or after milling at fixed increments.  
5.7 Microscopical tests are generally satisfactory for determining the suitability of material for intended use, specification acceptance, manufacturing control, development, or research.
SCOPE
1.1 These test methods cover procedures for estimating the depth of decarburization of steels irrespective of the composition, matrix microstructure, or section shape. The following basic procedures may be used:  
1.1.1 Screening methods.  
1.1.2 Microscopical methods.  
1.1.3 Microindentation hardness methods.  
1.1.4 Chemical analysis methods.  
1.2 In case of a dispute, the rigorous quantitative or lineal analysis method (see 7.3.5 and 7.3.6) shall be the referee method. These methods can be employed with any cross-sectional shape. The chemical analytical methods generally reveal a greater depth of decarburization than the microscopical methods but are limited to certain simple shapes and by availability of equipment. These techniques are generally reserved for research studies. The microindentation hardness method is suitable for accurate measurements of hardened structures with relatively homogeneous microstructures.  
1.3 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this 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, 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 A193/A193M-23(Specification)
Standard Specification for Alloy-Steel and Stainless Steel Bolting for High Temperature or High Pressure Service and Other Special Purpose Applications

ABSTRACT
This specification covers alloy steel and stainless steel bolting material for pressure vessels, valves, flanges, and fittings for high temperature or high pressure service, or other special purpose applications. Ferritic steels shall be properly heat treated as best suits the high temperature characteristics of each grade. Immediately after rolling or forging, the bolting material shall be allowed to cool to a temperature below the cooling transformation range. The chemical composition requirements for each alloy are presented in details. The steel shall not contain an unspecified element for ordered grade to the extent that the steel conforms to the requirements of another grade for which that element is a specified element. The tensile property and hardness property requirements are discussed, the tensile property requirement is highlighted by a full size fasteners, wedge tensile testing.
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1.1 This specification2 covers alloy and stainless steel bolting materials and bolting components for pressure vessels, valves, flanges, and fittings for high temperature or high pressure service, or other special purpose applications. See Specification A962/A962M for the definition of bolting. Bars and wire shall be hot-wrought and may be further processed by centerless grinding or by cold drawing. Austenitic stainless steel may be carbide solution treated or carbide solution treated and strain-hardened. When strain hardened austenitic stainless steel is ordered, the purchaser should take special care to ensure that Appendix X1 is thoroughly understood.  
1.2 Several grades are covered, including ferritic steels and austenitic stainless steels designated B5, B8, and so forth. Selection will depend upon design, service conditions, mechanical properties, and high temperature characteristics.  
1.3 The following referenced general requirements are indispensable for application of this specification: Specification A962/A962M.
Note 1: The committee formulating this specification has included several steel types that have been rather extensively used for the present purpose. Other compositions will be considered for inclusion by the committee from time to time as the need becomes apparent.
Note 2: For grades of alloy-steel bolting suitable for use at the lower range of high temperature applications, reference should be made to Specification A354.
Note 3: For grades of alloy-steel bolting suitable for use in low temperature applications, reference should be made to Specification A320/A320M.  
1.4 Nuts for use with bolting are covered in Section 13.  
1.5 Supplementary Requirements are provided for use at the option of the purchaser. The supplementary requirements shall apply only when specified in the purchase order or contract.  
1.6 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.  
1.7 The values stated in either SI units or inch-pound 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 used independently of the other. Combining values from the two systems may result in non-conformance with the standard.  
1.8 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 E693-23(Practice)
Standard Practice for Characterizing Neutron Exposures in Iron and Low Alloy Steels in Terms of Displacements Per Atom (DPA)

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4.1 A pressure vessel surveillance program requires a methodology for relating radiation-induced changes in materials exposed in accelerated surveillance locations to the condition of the pressure vessel (see Practice E853). An important consideration is that the irradiation exposures be expressed in a unit that is physically related to the damage mechanisms.  
4.2 A major source of neutron radiation damage in metals is the displacement of atoms from their normal lattice sites. Hence, an appropriate damage exposure index is the number of times, on the average, that an atom has been displaced during an irradiation. This can be expressed as the total number of displaced atoms per unit volume, per unit mass, or per atom of the material. Displacements per atom is the most common way of expressing this quantity. The number of dpa associated with a particular irradiation depends on the amount of energy deposited in the material by the neutrons, and hence, depends on the neutron spectrum. (For a more extended discussion, see Practice E521.)  
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1.1 This practice describes a standard procedure for characterizing neutron irradiations of iron (and low alloy steels) in terms of the exposure index displacements per atom (dpa) for iron.  
1.2 Although the methods of this practice apply to any material for which a displacement cross section σd(E) is known (see Practice E521), this practice is written specifically for iron.  
1.3 It is assumed that the displacement cross section for iron is an adequate approximation for calculating displacements in steels that are mostly iron (95 to 100 %) in radiation fields for which secondary damage processes are not important.  
1.4 Procedures analogous to this one can be formulated for calculating dpa in charged particle irradiations. (See Practice E521.)  
1.5 The application of this practice requires knowledge of the total neutron fluence and flux spectrum. Refer to Practice E521 for determining these quantities.  
1.6 The correlation of radiation effects data is beyond the scope of this practice.  
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2.1 Significance—Retained austenite with a near random crystallographic orientation is found in the microstructure of heat-treated low-alloy, high-strength steels that have medium (0.40 weight %) or higher carbon contents. Although the presence of retained austenite may not be evident in the microstructure, and may not affect the bulk mechanical properties such as hardness of the steel, the transformation of retained austenite to martensite during service can affect the performance of the steel.  
2.2 Use—The measurement of retained austenite can be included in low-alloy steel development programs to determine its effect on mechanical properties. Retained austenite can be measured on a companion specimen or test section that is included in a heat-treated lot of steel as part of a quality control practice. The measurement of retained austenite in steels from service can be included in studies of material performance.
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1.2 The method applies to carbon and alloy steels with near random crystallographic orientations of both ferrite and austenite phases.  
1.3 This test method is valid for retained austenite contents from 1 % by volume and above.  
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This specification covers alloy steel bolting materials for pressure vessels, valves, flanges, and fittings for low-temperature service. Each alloy shall conform to the prescribed chemical composition requirements. The material, as represented by the tension specimens, shall conform to the requirements as to tensile properties such as tensile strength, yield strength, elongation, and hardness. The material shall meet the prescribed impact energy absorption requirements and the recommended test temperature. Mechanical tests shall be conducted on the material, namely: impact testing, tension testing, and hardness testing.
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1.1 This specification2 covers alloy and stainless steel bolting materials and bolting components for pressure vessels, valves, flanges, and fittings for low-temperature service. See Specification A962/A962M for the definition of bolting. The bars shall be hot-wrought and may be further processed by centerless grinding or by cold drawing. Austenitic stainless steel may be solution annealed or annealed and strain-hardened. When strain hardened austenitic stainless steel is ordered, the purchaser should take special care to ensure that Appendix X1 is thoroughly understood.  
1.2 Several grades are covered, including both ferritic and austenitic steels designated L7, B8, etc. Selection will depend on design, service conditions, mechanical properties, and low-temperature characteristics. The mechanical requirements of Table 1 indicate the diameters for which the minimum mechanical properties apply to the various grades and classes, and Table 2 stipulates the requirements for Charpy impact energy absorption. The manufacturer should determine that the material can conform to these requirements before parts are manufactured. For example, when Grade L43 is specified to meet the Table 2 impact energy values at −150 °F [−101 °C], additional restrictions (such as procuring a steel with lower P and S contents than might normally be supplied) in the chemical composition for AISI 4340 are likely to be required.  
Note 1: The committee formulating this specification has included several grades of material that have been rather extensively used for the present purpose. Other compositions will be considered for inclusion by the committee from time to time as the need becomes apparent. Users should note that hardenability of some of the grades mentioned may restrict the maximum size at which the required mechanical properties are obtainable.    
1.3 The following referenced general requirements are indispensable for application of this specification: Specification A962/A962M.  
1.4 Nuts for use with bolting are covered in Section 10 and the nut material shall be impact tested.  
1.5 Supplementary Requirements are provided for use at the option of the purchaser. The supplementary requirements shall apply only when specified in the purchase order or contract.  
1.6 This specification is expressed in both inch-pound units and SI units; however, unless the purchase order or contract specifies the applicable M specification designation (SI) units, the inch-pound units shall apply.  
1.7 The values stated in either SI units or inch-pound units are to be regarded separately as standard. 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 non-conformance with the standard.  
1.8 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 A664-15(2022)(Practice)
Standard Practice for Identification of Standard Electrical Steel Grades in ASTM Specifications

ABSTRACT
This practice explains the procedure for identifying standard grades and types of flat-rolled electrical steels in ASTM electrical steel specifications. This practice applies to flat-rolled magnetically soft irons and steel such as low-carbon steels and alloys of iron with silicon, aluminum, and so forth produced to a specified thickness and maximum value of core loss. These designations are intended to replace the old AISI M designations which are no longer supported. The practice also has a cross-reference between thickness and electrical sheet gage number.
SCOPE
1.1 This practice covers the procedure for designating (within ASTM specifications) standard grades of flat-rolled electrical steels made to specified maximum values of specific core loss. This practice applies to magnetically soft irons and steel (low-carbon steels and alloys of iron with silicon, aluminum, and other alloying elements) where a core loss measurement at a stated peak value of alternating induction and a stated frequency, such as 1.5 T (15 kG) and 60 Hz, is normally used to grade the material. This practice also applies when some other property is specified (or a different induction or frequency, or both) as the limiting characteristic, provided the material also meets all the requirements of the ASTM specification.  
1.2 Individual specifications that are in conformity with this practice are Specifications A677, A683, A726, A876, and A1086.  
1.3 The values stated in SI units are to be regarded as standard. The values given in parentheses are mathematical conversions to customary (cgs-emu and inch-pound) units which 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, 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 E415-21(Test Method)
Standard Test Method for Analysis of Carbon and Low-Alloy Steel by Spark Atomic Emission Spectrometry

SIGNIFICANCE AND USE
5.1 This test method for the spectrometric analysis of metals and alloys is primarily intended to test such materials for compliance with compositional specifications. It is assumed that all who use this test method will be analysts capable of performing common laboratory procedures skillfully and safely. It is expected that work will be performed in a properly equipped laboratory.
SCOPE
1.1 This test method covers the simultaneous determination of 21 alloying and residual elements in carbon and low-alloy steels by spark atomic emission vacuum spectrometry in the mass fraction ranges shown Note 1.
Element  
Composition Range, %  
Applicable Range,
Mass Fraction %A  
Quantitative Range,
Mass Fraction %B  
Aluminum  
0 to 0.093  
0.006 to 0.093  
Antimony  
0 to 0.027  
0.006 to 0.027  
Arsenic  
0 to 0.1  
0.003 to 0.1  
Boron  
0 to 0.007  
0.0004 to 0.007  
Calcium  
0 to 0.003  
0.002 to 0.003  
Carbon  
0 to 1.1  
0.02 to 1.1  
Chromium  
0 to 8.2  
0.007 to 8.14  
Cobalt  
0 to 0.20  
0.006 to 0.20  
Copper  
0 to 0.5  
0.006 to 0.5  
LeadC  
0 to 0.2  
0.002 to 0.2    
Manganese  
0 to 2.0  
0.03 to 2.0  
Molybdenum  
0 to 1.3  
0.007 to 1.3  
Nickel  
0 to 5.0  
0.006 to 5.0  
Niobium  
0 to 0.12  
0.003 to 0.12  
Nitrogen  
0 to 0.015  
0.01 to 0.055  
Phosphorous  
0 to 0.085  
0.006 to 0.085  
Silicon  
0 to 1.54  
0.02 to 1.54  
Sulfur  
0 to 0.055  
0.001 to 0.055  
Tin  
0 to 0.061  
0.005 to 0.061    
Titanium  
0 to 0.2  
0.001 to 0.2    
Vanadium  
0 to 0.3  
0.003 to 0.3    
Zirconium  
0 to 0.05  
0.01 to 0.05
Note 1: The mass fraction ranges of the elements listed have been established through cooperative testing2 of reference materials.  
1.2 This test method covers analysis of specimens having a diameter adequate to overlap and seal the bore of the spark stand opening. The specimen thickness can vary significantly according to the design of the spectrometer stand, but a thickness between 10 mm and 38 mm has been found to be most practical.  
1.3 This test method covers the routine control analysis in iron and steelmaking operations and the analysis of processed material. It is designed for chill-cast, rolled, and forged specimens. Better performance is expected when reference materials and specimens are of similar metallurgical condition and composition. However, it is not required for all applications of this 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, 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 A1082/A1082M-16(2021)(Specification)
Standard Specification for High Strength Precipitation Hardening and Duplex Stainless Steel Bolting for Special Purpose Applications

ABSTRACT
This specification covers high strength stainless steel bolting for special purpose applications such as pressure vessels. Several grades of precipitation-hardened and duplex (ferritic-austenitic) stainless steels are covered. Selection will depend upon design, service conditions, mechanical properties and characteristics related to the application. Bolting supplied to this specification shall conform to the requirements of Specification A962/A962M. These requirements include test methods, finish, thread dimensions, marking, terminology, testing, certification, optional supplementary requirements, and others. Bars shall be produced in accordance with Specifications A276/A276M, A479/A479M or A564/A564M as applicable while the fasteners shall be produced in accordance with this specification and the requirements of A962/A962M.
SCOPE
1.1 This specification covers high strength stainless steel bolting materials and bolting components for special purpose applications such as pressure vessels. Several grades of precipitation-hardened and duplex (ferritic-austenitic) stainless steels are covered. Selection will depend upon design, service conditions, mechanical properties and characteristics related to the application.  
1.2 The following referenced general requirements are indispensable for application of this specification: Specification A962/A962M.  
1.3 Supplementary Requirements are provided for use at the option of the purchaser. The Supplementary Requirements shall only apply when specified individually by the purchaser in the purchase order or contract.  
1.4 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.  
1.5 The values stated in either SI units or inch-pound 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 used independently of the other. Combining values from the two systems may result in non-conformance with the standard.  
1.6 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.  
1.7 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.

  • Technical specification
    6 pages
    English language
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ASTM
ASTM E1077-14(2021)(Test Method)
Standard Test Methods for Estimating the Depth of Decarburization of Steel Specimens

SIGNIFICANCE AND USE
5.1 These test methods are used to detect surface losses in carbon content due to heating at elevated temperatures, as in hot working or heat treatment.  
5.2 Results of such tests may be used to qualify material for shipment according to agreed upon guidelines between purchaser and manufacturer, for guidance as to machining allowances, or to assess the influence of processing upon decarburization tendency.  
5.3 Screening tests are simple, fast, low-cost tests designed to separate non-decarburized samples from those with appreciable decarburization. Based on the results of such tests, the other procedures may be utilized as applicable.  
5.4 Microscopical tests require a metallographically polished cross section to permit reasonably accurate determination of the depth and nature of the decarburization present. Several methods may be employed for estimation of the depth of decarburization. The statistical accuracy of each varies with the amount of effort expended.  
5.5 Microindentation hardness methods are employed on polished cross sections and are most suitable for hardened specimens with reasonably uniform microstructures. This procedure can be used to define the depth to a specific minimum hardness or the depth to a uniform hardness.  
5.6 Chemical analytical methods are limited to specimens with simple, uniform shapes and are based on analysis of incremental turnings or after milling at fixed increments.  
5.7 Microscopical tests are generally satisfactory for determining the suitability of material for intended use, specification acceptance, manufacturing control, development, or research.
SCOPE
1.1 These test methods cover procedures for estimating the depth of decarburization of steels irrespective of the composition, matrix microstructure, or section shape. The following basic procedures may be used:  
1.1.1 Screening methods.  
1.1.2 Microscopical methods.  
1.1.3 Microindentation hardness methods.  
1.1.4 Chemical analysis methods.  
1.2 In case of a dispute, the rigorous quantitative or lineal analysis method (see 7.3.5 and 7.3.6) shall be the referee method. These methods can be employed with any cross-sectional shape. The chemical analytical methods generally reveal a greater depth of decarburization than the microscopical methods but are limited to certain simple shapes and by availability of equipment. These techniques are generally reserved for research studies. The microindentation hardness method is suitable for accurate measurements of hardened structures with relatively homogeneous microstructures.  
1.3 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this 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, 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.

  • Standard
    10 pages
    English language
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