ASTM A194/A194M-08a

Standard Specification for Carbon and Alloy Steel Nuts for Bolts for High Pressure or High Temperature Service, or Both

ABSTRACT
This specification covers a variety of carbon, alloy, and martensitic and austenitic stainless steel nuts. These nuts are intended for high-pressure or high-temperature service, or both. Bars from which the nuts are made shall be hot-wrought. The material may be further processed by centerless grinding or by cold drawing. Austenitic stainless steel may be solution annealed or annealed and strain-hardened. Each alloy shall conform to the chemical composition requirements prescribed. Hardness tests, proof of load tests, and cone proof load tests shall be made to all nuts to meet the requirements specified.
SCOPE
1.1 This specification covers a variety of carbon, alloy, and martensitic stainless steel nuts in the size range ¼ through 4 in. and metric M6 through M100 nominal. It also covers austenitic stainless steel nuts in the size range ¼ in. and M6 nominal and above. These nuts are intended for high-pressure or high-temperature service, or both. Grade substitutions without the purchaser's permission are not allowed.  
1.2 Bars from which the nuts are made shall be hot-wrought. The material may be further processed by centerless grinding or by cold drawing. Austenitic stainless steel may be solution annealed or annealed and strain-hardened. When annealed and strain hardened austenitic stainless steel is ordered in accordance with Supplementary Requirement S1, the purchaser should take special care to ensure that 8.2.2, Supplementary Requirement S1, and Appendix X1 are thoroughly understood.
1.3 Supplementary requirements (S1 through S8) of an optional nature are provided. These shall apply only when specified in the inquiry, contract, and order.  
1.4 This specification is expressed in both inch-pound units and in SI units. However, unless the order specifies the applicable“ M” specification designation (SI units), the material shall be furnished to inch-pound units.  
1.5 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 exact equivalents; therefore, each system must be used independently of the other. Combining values from the two systems may result in nonconformance with the specification. Within the text, the SI units are shown in brackets.

General Information

• Status: Historical
• Publication Date: 30-Apr-2008
• ICS: 21.060.20 - Nuts
• 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

Relations

• Replaces: ASTM A194/A194M-08 - Standard Specification for Carbon and Alloy Steel Nuts for Bolts for High Pressure or High Temperature Service, or Both
• Effective Date: 01-May-2008
• Replaced By: ASTM A194/A194M-08b - Standard Specification for Carbon and Alloy Steel Nuts for Bolts for High Pressure or High Temperature Service, or Both
• Effective Date: 01-Aug-2008
• Referred By: ASTM F1565-00(2019) - Standard Specification for Pressure-Reducing Valves for Steam Service
• Effective Date: 01-May-2008
• Referred By: ASTM F2798-09(2023) - Standard Specification for Sealless Lube Oil Pump with Oil Through Motor for Marine Applications
• Effective Date: 01-May-2008
• 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: 01-May-2008
• Referred By: ASTM F2437/F2437M-17 - Standard Specification for Carbon and Alloy Steel Compressible-Washer-Type Direct Tension Indicators for Use with Cap Screws, Bolts, Anchors, and Studs
• Effective Date: 01-May-2008
• Referred By: ASTM F1718-01(2019) - Standard Specification for Rotary Positive Displacement Distillate Fuel Pumps
• Effective Date: 01-May-2008
• Referred By: ASTM F1370-92(2019)e1 - Standard Specification for Pressure-Reducing Valves for Water Systems, Shipboard
• Effective Date: 01-May-2008
• Referred By: ASTM F2716-08(2020) - Standard Practice for Comparison of Nonmetallic Flat Gaskets in High Pressure Saturated Steam
• Effective Date: 01-May-2008
• Referred By: ASTM F3394/F3394M-20 - Standard Specification for Hardened Steel Backup and Reaction Washers Inch and Metric Dimensions<rangeref></rangeref >
• Effective Date: 01-May-2008
• Referred By: ASTM B695-21 - Standard Specification for Coatings of Zinc Mechanically Deposited on Iron and Steel
• Effective Date: 01-May-2008
• Referred By: ASTM F1508-96(2021) - Standard Specification for Angle Style, Pressure Relief Valves for Steam, Gas, and Liquid Services
• Effective Date: 01-May-2008
• Referred By: ASTM F1554-20 - Standard Specification for Anchor Bolts, Steel, 36, 55, and 105-ksi Yield Strength
• Effective Date: 01-May-2008
• Referred By: ASTM F998-12(2022) - Standard Specification for Centrifugal Pump, Shipboard Use
• Effective Date: 01-May-2008
• Referred By: ASTM A193/A193M-23 - Standard Specification for Alloy-Steel and Stainless Steel Bolting for High Temperature or High Pressure Service and Other Special Purpose Applications
• Effective Date: 01-May-2008

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
Endorsed by
Designation: A 194/A 194M – 08a Manufacturers Standardization Society
of the Valve and Fittings Industry
Used in USNRC-RDT Standards
Standard Specification for
Carbon and Alloy Steel Nuts for Bolts for High Pressure or
1
High Temperature Service, or Both
This standard is issued under the fixed designationA 194/A 194M; 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.
This standard has been approved for use by agencies of the Department of Defense.
1. Scope* 2. Referenced Documents
2 3
1.1 This specification covers a variety of carbon, alloy, and 2.1 ASTM Standards:
1
martensitic stainless steel nuts in the size range ⁄4 through 4 A 153/A 153M Specification for Zinc Coating (Hot-Dip) on
in. and metric M6 through M100 nominal. It also covers Iron and Steel Hardware
1
austenitic stainless steel nuts in the size range ⁄4 in. and M6 A 276 Specification for Stainless Steel Bars and Shapes
nominal and above. These nuts are intended for high-pressure A 320/A 320M Specification for Alloy-Steel and Stainless
or high-temperature service, or both. Grade substitutions with- Steel Bolting Materials for Low-Temperature Service
out the purchaser’s permission are not allowed. A 962/A 962M Specification for Common Requirements
1.2 Barsfromwhichthenutsaremadeshallbehot-wrought. forSteelFastenersorFastenerMaterials,orBoth,Intended
The material may be further processed by centerless grinding for Use at Any Temperature from Cryogenic to the Creep
or by cold drawing. Austenitic stainless steel may be solution Range
annealed or annealed and strain-hardened. When annealed and B 695 Specification for Coatings of Zinc Mechanically
strain hardened austenitic stainless steel is ordered in accor- Deposited on Iron and Steel
dance with Supplementary Requirement S1, the purchaser B 696 SpecificationforCoatingsofCadmiumMechanically
should take special care to ensure that 8.2.2, Supplementary Deposited
Requirement S1, andAppendix X1 are thoroughly understood. B 766 Specification for Electrodeposited Coatings of Cad-
1.3 Supplementary requirements (S1 through S8) of an mium
optional nature are provided. These shall apply only when E112 Test Methods for Determining Average Grain Size
specified in the inquiry, contract, and order. F 1940 Test Method for Process Control Verification to
1.4 This specification is expressed in both inch-pound units Prevent Hydrogen Embrittlement in Plated or Coated
and in SI units. However, unless the order specifies the Fasteners
applicable“ M” specification designation (SI units), the mate- F 1941 Specification for Electrodeposited Coatings on
rial shall be furnished to inch-pound units. Threaded Fasteners (Unified Inch Screw Threads (UN/
1.5 The values stated in either inch-pound units or SI units UNR))
4
are to be regarded separately as standard. The values stated in 2.2 American National Standards:
each system are not exact equivalents; therefore, each system B 1.1 Unified Screw Threads
must be used independently of the other. Combining values B 1.2 Gages and Gaging for Unified Inch Screw Threads
from the two systems may result in nonconformance with the B 1.13M Metric Screw Threads
specification. Within the text, the SI units are shown in B 18.2.2 Square and Hex Nuts
brackets. B 18.2.4.6M Metric Heavy Hex Nuts
3. Terminology
3.1 Definitions of Terms Specific to This Standard:
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
3
A01.22 on Steel Forgings andWrought Fittings for PipingApplications and Bolting For referenced ASTM standards, visit the ASTM website, www.astm.org, or
Materials for Piping and Special Purpose Applications. contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
Current edition approved May 1, 2008. Published June 2008. Originally Standards volume information, refer to the standard’s Document Summary page on
approved in 1936. Last previous edition approved in 2008 as A 194/A 194M–08. the ASTM website.
2 4
For ASME Boiler and Pressure Vessel Code applications see related Specifi- Available fromAmerican National Standards Institute (ANSI), 25 W. 43rd St.,
cation SA-194 in Section II of that code. 4th Floor, New York, NY 10036, http://www.ansi.org.
*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 ----------------------
A 194/A 194M – 08a
3.1.1 Austenitic Grades—All grades with a prefix of “8” or
...

This document is not anASTM standard and is intended only to provide the user of anASTM 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.
Endorsed by
Designation:A194/A194M–08 Designation: A 194/A 194M – 08a Manufacturers Standardization Society
of the Valve and Fittings Industry
Used in USNRC-RDT Standards
Standard Specification for
Carbon and Alloy Steel Nuts for Bolts for High Pressure or
1
High Temperature Service, or Both
This standard is issued under the fixed designationA 194/A 194M; 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.
This standard has been approved for use by agencies of the Department of Defense.
1. Scope*
2
1
1.1 This specification covers a variety of carbon, alloy, and martensitic stainless steel nuts in the size range ⁄4 through 4 in.
1
and metric M6 through M100 nominal. It also covers austenitic stainless steel nuts in the size range ⁄4 in. and M6 nominal and
above. These nuts are intended for high-pressure or high-temperature service, or both. Grade substitutions without the purchaser’s
permission are not allowed.
1.2 Bars from which the nuts are made shall be hot-wrought. The material may be further processed by centerless grinding or
by cold drawing. Austenitic stainless steel may be solution annealed or annealed and strain-hardened. When annealed and strain
hardened austenitic stainless steel is ordered in accordance with Supplementary Requirement S1, the purchaser should take special
care to ensure that 8.2.2, Supplementary Requirement S1, and Appendix X1 are thoroughly understood.
1.3 Supplementary requirements (S1 through S8) of an optional nature are provided. These shall apply only when specified in
the inquiry, contract, and order.
1.4 This specification is expressed in both inch-pound units and in SI units. However, unless the order specifies the applicable“
M” specification designation (SI units), the material shall be furnished to inch-pound units.
1.5 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 exact equivalents; therefore, each system must be used independently of the other. Combining values from the two
systems may result in nonconformance with the specification. Within the text, the SI units are shown in brackets.
2. Referenced Documents
3
2.1 ASTM Standards:
A 153/A 153M Specification for Zinc Coating (Hot-Dip) on Iron and Steel Hardware
A 276 Specification for Stainless Steel Bars and Shapes
A 320/A 320M Specification for Alloy-Steel and Stainless Steel Bolting Materials for Low-Temperature Service
A 962/A 962M Specification for Common Requirements for Steel Fasteners or Fastener Materials, or Both, Intended for Use
at Any Temperature from Cryogenic to the Creep Range
B 695 Specification for Coatings of Zinc Mechanically Deposited on Iron and Steel
B 696 Specification for Coatings of Cadmium Mechanically Deposited
B 766 Specification for Electrodeposited Coatings of Cadmium
E 112 Test Methods for Determining Average Grain Size
F 1940 Test Method for Process Control Verification to Prevent Hydrogen Embrittlement in Plated or Coated Fasteners
F 1941 Specification for Electrodeposited Coatings on Threaded Fasteners (Unified Inch Screw Threads (UN/UNR))
4
2.2 American National Standards:
B 1.1 Unified Screw Threads
B 1.2 Gages and Gaging for Unified Inch Screw Threads
B 1.13M Metric Screw Threads
1
This specification is under the jurisdiction ofASTM CommitteeA01 on Steel, Stainless Steel and RelatedAlloys and is the direct responsibility of SubcommitteeA01.22
on Steel Forgings and Wrought Fittings for Piping Applications and Bolting Materials for Piping and Special Purpose Applications.
Current edition approved AprilMay 1, 2008. Published MayJune 2008. Originally approved in 1936. Last previous edition approved in 20072008 as A194/
A194M–07b.A 194/A 194M–08.
2
For ASME Boiler and Pressure Vessel Code applications see related Specification SA-194 in Section II of that code.
3
For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM 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.
4
Available from American National Standards Institute (ANSI), 25 W. 43rd St., 4th Floor, New York, NY 10036, http://www.ansi.org.
*A Summary of Changes section appears at the end of this standard.
Copyright © ASTM International, 100 Barr
...

This document is not anASTM standard and is intended only to provide the user of anASTM 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.
Endorsed by
Designation:A 194/A 194M–08 Designation: A 194/A 194M – 08a Manufacturers Standardization Society
of the Valve and Fittings Industry
Used in USNRC-RDT Standards
Standard Specification for
Carbon and Alloy Steel Nuts for Bolts for High Pressure or
1
High Temperature Service, or Both
This standard is issued under the fixed designationA 194/A 194M; 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.
1. Scope*
2
1
1.1 This specification covers a variety of carbon, alloy, and martensitic stainless steel nuts in the size range ⁄4 through 4 in.
1
and metric M6 through M100 nominal. It also covers austenitic stainless steel nuts in the size range ⁄4 in. and M6 nominal and
above. These nuts are intended for high-pressure or high-temperature service, or both. Grade substitutions without the purchaser’s
permission are not allowed.
1.2 Bars from which the nuts are made shall be hot-wrought. The material may be further processed by centerless grinding or
by cold drawing. Austenitic stainless steel may be solution annealed or annealed and strain-hardened. When annealed and strain
hardened austenitic stainless steel is ordered in accordance with Supplementary Requirement S1, the purchaser should take special
care to ensure that 8.2.2, Supplementary Requirement S1, and Appendix X1 are thoroughly understood.
1.3 Supplementary requirements (S1 through S8) of an optional nature are provided. These shall apply only when specified in
the inquiry, contract, and order.
1.4 This specification is expressed in both inch-pound units and in SI units. However, unless the order specifies the applicable“
M” specification designation (SI units), the material shall be furnished to inch-pound units.
1.5 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 exact equivalents; therefore, each system must be used independently of the other. Combining values from the two
systems may result in nonconformance with the specification. Within the text, the SI units are shown in brackets.
2. Referenced Documents
3
2.1 ASTM Standards:
A153/A153M Specification for Zinc Coating (Hot-Dip) on Iron and Steel Hardware
A276 Specification for Stainless Steel Bars and Shapes
A320/A320M Specification for Alloy-Steel and Stainless Steel Bolting for Low-Temperature Service
A962/A962M SpecificationforCommonRequirementsforBoltingIntendedforUseatAnyTemperaturefromCryogenictothe
Creep Range
B695 Specification for Coatings of Zinc Mechanically Deposited on Iron and Steel
B696 Specification for Coatings of Cadmium Mechanically Deposited
B766 Specification for Electrodeposited Coatings of Cadmium
E112 Test Methods for Determining Average Grain Size
F1940 Test Method for Process Control Verification to Prevent Hydrogen Embrittlement in Plated or Coated Fasteners
F1941 Specification for Electrodeposited Coatings on Threaded Fasteners (Unified Inch Screw Threads (UN/UNR))
4
2.2 American National Standards:
B 1.1 Unified Screw Threads
B 1.2 Gages and Gaging for Unified Inch Screw Threads
B 1.13M Metric Screw Threads
1
This specification is under the jurisdiction ofASTM CommitteeA01 on Steel, Stainless Steel and RelatedAlloys and is the direct responsibility of SubcommitteeA01.22
on Steel Forgings and Wrought Fittings for Piping Applications and Bolting Materials for Piping and Special Purpose Applications.
Current edition approved AprilMay 1, 2008. Published MayJune 2008. Originally approved in 1936. Last previous edition approved in 20072008 as A 194/A
194M–07b.A 194/A 194M–08.
2
For ASME Boiler and Pressure Vessel Code applications see related Specification SA-194 in Section II of that code.
3
For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM 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.
4
Available from American National Standards Institute (ANSI), 25 W. 43rd St., 4th Floor, New York, NY 10036, http://www.ansi.org.
*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.
...