ASTM A437/A437M-15

Standard Specification for Stainless and Alloy-Steel Turbine-Type Bolting Specially Heat Treated for High-Temperature Service

ABSTRACT
This specifications covers alloy-steel bolting material specially heat treated for high-temperature service, such as steam turbine, gas turbine, and similar uses. The grades of steels covered here are: Grade B4B, Grade B4C, and Grade B4D. Steels of Grades B4B and B4C shall undergo heating, liquid quenching, reheating, tempering, and air or furnace cooling, respectively. Steels of Grade B4D shall undergo heating, oil quenching, reheating or tempering, and air of furnace cooling, respectively. Heat and product analyses shall be performed wherein specimens shall conform to required chemical composition of carbon, manganese, phosphorus, sulfur, silicon, nickel, chromium, molybdenum, vanadium, tungsten, aluminum, titanium, and tin. The steels shall undergo tensile, impact, and hardness tests, and shall conform to the following mechanical requirements: tensile strength, yield strength, elongation, impact value, Brinell hardness number, and Rockwell hardness number. All bars or forged blanks of starting material shall be subjected to nondestructive inspection using any of the following methods: Eddy current, Magnetic particle inspection (wet or dry), Liquid penetrant inspection, Ultrasonic testing, or Visual testing.
SCOPE
1.1 This specification2 covers stainless and alloy-steel bolting material and bolting components specially heat treated for high-temperature service, such as steam turbine, gas turbine, and similar uses. See Specification A962/A962M for the definition of bolting. This material requires special processing and should not be used in general-purpose applications. Bolting furnished as bars shall be hot wrought and may be further processed by centerless grinding or by cold drawing.  
1.2 The high-temperature properties of the bolting materials and components covered by this specification are dependent upon special heat treatment, which is required. Although the high-temperature properties are not specified, they are implied by control of the chemistry, heat treatment, and room-temperature properties of the bolting material.  
1.3 Three levels of bolting strength are covered, designated Grades B4B, B4C, and B4D.  
1.4 The following referenced general requirements are indispensable for application of this specification: Specification A962/A962M.  
1.5 Supplementary requirements are provided for use at the option of the purchaser. The supplementary requirements shall apply only when specified individually by the purchaser 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.

General Information

• Status: Historical
• Publication Date: 31-Oct-2015
• ICS: 21.060.01 - Fasteners in general
• Technical Committee: A01 - Steel, Stainless Steel and Related Alloys
• Drafting Committee: A01.22 - Steel Forgings and Wrought Fittings for Piping Applications and Bolting Materials for Piping and Special Purpose Applications

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:A437/A437M −15
Standard Specification for
Stainless and Alloy-Steel Turbine-Type Bolting Specially
1
Heat Treated for High-Temperature Service
This standard is issued under the fixed designationA437/A437M; 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* system may not be exact equivalents; therefore, each system
2 shall be used independently of the other. Combining values
1.1 This specification covers stainless and alloy-steel bolt-
from the two systems may result in non-conformance with the
ing material and bolting components specially heat treated for
standard.
high-temperature service, such as steam turbine, gas turbine,
and similar uses. See Specification A962/A962M for the
2. Referenced Documents
definition of bolting. This material requires special processing
3
2.1 ASTM Standards:
and should not be used in general-purpose applications. Bolt-
A962/A962M Specification for Common Requirements for
ing furnished as bars shall be hot wrought and may be further
Bolting Intended for Use at Any Temperature from Cryo-
processed by centerless grinding or by cold drawing.
genic to the Creep Range
1.2 The high-temperature properties of the bolting materials
E292 Test Methods for Conducting Time-for-Rupture Notch
and components covered by this specification are dependent
Tension Tests of Materials
upon special heat treatment, which is required. Although the
E112 Test Methods for Determining Average Grain Size
high-temperature properties are not specified, they are implied
by control of the chemistry, heat treatment, and room-
3. Ordering Information
temperature properties of the bolting material.
3.1 It shall be the responsibility of the purchaser to specify
1.3 Three levels of bolting strength are covered, designated
all requirements necessary for product under this specification.
Grades B4B, B4C, and B4D. Such requirements to be considered include, but are not limited
to, the following:
1.4 The following referenced general requirements are in-
3.1.1 Specification designation, grade, issue date, and revi-
dispensable for application of this specification: Specification
sion letter,
A962/A962M.
3.1.2 Quantity (weight or number of pieces),
1.5 Supplementary requirements are provided for use at the
3.1.3 Description (bars, bolts, nuts, etc.),
option of the purchaser. The supplementary requirements shall
3.1.4 Dimensions,
apply only when specified individually by the purchaser in the
3.1.5 Finish, and
purchase order or contract.
3.1.6 Impact testing of nuts, if required (see Section 8).
1.6 This specification is expressed in both inch-pound units
4. Common Requirements
and in SI units; however, unless the purchase order or contract
specifies the applicable M specification designation (SI units),
4.1 Bolting materials and bolting components supplied to
the inch-pound units shall apply.
this specification shall conform to the requirements of Speci-
fication A962/A962M. These requirements include test
1.7 The values stated in either SI units or inch-pound units
methods, finish, thread dimensions, macroetch (Grade B4D
are to be regarded separately as standard. Within the text, the
only), marking, certification, optional supplementary
SI units are shown in brackets. The values stated in each
requirements, and others. Failure to comply with the require-
ments of Specification A962/A962M constitutes nonconfor-
mance with this specification. In case of conflict between this
1
This specification is under the jurisdiction of ASTM Committee A01 on Steel,
specificationandSpecificationA962/A962M,thisspecification
Stainless Steel and Related Alloys and is the direct responsibility of Subcommittee
A01.22 on Steel Forgings and Wrought Fittings for PipingApplications and Bolting shall prevail.
Materials for Piping and Special Purpose Applications.
Current edition approved Nov. 1, 2015. Published November 2015. Originally
3
approved in 1959. Last previous edition approved in 2012 as A437/A437M–12. For referenced ASTM standards, visit the ASTM website, www.astm.org, or
DOI: 10.1520/A0437_A0437M-15. contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
2
For ASME Boiler and Pressure Vessel Code applications see related Specifi- Standards volume information, refer to the standard’s Document Summary page on
cation SA-437 in Section II of that code. 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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A437/A437M−
...

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: A437/A437M − 12 A437/A437M − 15
Standard Specification for
Stainless and Alloy-Steel Turbine-Type Bolting Specially
1
Heat Treated for High-Temperature Service
This standard is issued under the fixed designation A437/A437M; 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*
2
1.1 This specification covers stainless and alloy-steel bolting material and bolting components specially heat treated for
high-temperature service, such as steam turbine, gas turbine, and similar uses. See Specification A962/A962M for the definition
of bolting. This material requires special processing and should not be used in general-purpose applications. Bolting furnished as
bars shall be hot wrought and may be further processed by centerless grinding or by cold drawing.
1.2 The high-temperature properties of the bolting materials and components covered by this specification are dependent upon
special heat treatment, which is required. Although the high-temperature properties are not specified, they are implied by control
of the chemistry, heat treatment, and room-temperature properties of the bolting material.
1.3 Three levels of bolting strength are covered, designated Grades B4B, B4C, and B4D.
1.4 The following referenced general requirements are indispensable for application of this specification: Specification
A962/A962M.
1.5 Supplementary requirements are provided for use at the option of the purchaser. The supplementary requirements shall apply
only when specified individually by the purchaser 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.
2. Referenced Documents
3
2.1 ASTM Standards:
A962/A962M Specification for Common Requirements for Bolting Intended for Use at Any Temperature from Cryogenic to the
Creep Range
E292 Test Methods for Conducting Time-for-Rupture Notch Tension Tests of Materials
E112 Test Methods for Determining Average Grain Size
3. Ordering Information
3.1 It shall be the responsibility of the purchaser to specify all requirements necessary for product under this specification. Such
requirements to be considered include, but are not limited to, the following:
3.1.1 Specification designation, grade, issue date, and revision letter,
3.1.2 Quantity (weight or number of pieces),
3.1.3 Description (bars, bolts, nuts, etc.),
3.1.4 Dimensions,
3.1.5 Finish, and
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 A01.22
on Steel Forgings and Wrought Fittings for Piping Applications and Bolting Materials for Piping and Special Purpose Applications.
Current edition approved May 1, 2012Nov. 1, 2015. Published June 2012November 2015. Originally approved in 1959. Last previous edition approved in 20112012 as
A437/A437M–11.–12. DOI: 10.1520/A0437_A0437M-12.10.1520/A0437_A0437M-15.
2
For ASME Boiler and Pressure Vessel Code applications see related Specification SA-437 in Section II of that code.
3
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at [e-mail]. 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

---------------------- Page: 1 ----------------------
A437/A437M − 15
3.1.6 Impact testing of nuts, if required (see Section 8).
4. Common Requirements
4.1 Bolting materials and bolting components supplied to this specification shall conform to the requirements of Specification
A962/A962M. These requirements include test methods, finish, th
...