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ASTM A194/A194M-24

Current Revision

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

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1.1 This specification2 covers a variety of carbon, alloy, and martensitic stainless steel nuts in the size range 1/4 through 4 in. and metric M12 through M100 nominal. It also covers austenitic stainless steel nuts in the size range 1/4 in. and M12 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 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 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. Within the text, the SI units are shown in brackets.

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.


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.


SDO ASTM: ASTM International
Document Number A194
Publication Date May 1, 2024
Language en - English
Page Count 12
Revision Level 24
Supercedes
Committee A01.22
Publish Date Document Id Type View
May 1, 2024 A0194_A0194M-24 Revision
May 1, 2023 A0194_A0194M-23 Revision
Nov. 1, 2022 A0194_A0194M-22A Revision
May 1, 2022 A0194_A0194M-22 Revision
May 15, 2020 A0194_A0194M-20A Revision
May 1, 2020 A0194_A0194M-20 Revision
Nov. 1, 2018 A0194_A0194M-18 Revision
Sept. 1, 2017 A0194_A0194M-17A Revision
March 15, 2017 A0194_A0194M-17 Revision
Dec. 1, 2016 A0194_A0194M-16A Revision
May 1, 2016 A0194_A0194M-16 Revision
Nov. 1, 2015 A0194_A0194M-15A Revision
June 1, 2015 A0194_A0194M-15 Revision
Nov. 1, 2014 A0194_A0194M-14A Revision
May 1, 2014 A0194_A0194M-14 Revision
Oct. 1, 2013 A0194_A0194M-13 Revision
Nov. 1, 2012 A0194_A0194M-12A Revision
May 1, 2012 A0194_A0194M-12 Revision
Nov. 1, 2011 A0194_A0194M-11 Revision
Nov. 1, 2010 A0194_A0194M-10A Revision
April 1, 2010 A0194_A0194M-10 Revision
May 1, 2009 A0194_A0194M-09 Revision
Aug. 1, 2008 A0194_A0194M-08B Revision
May 1, 2008 A0194_A0194M-08A Revision
April 1, 2008 A0194_A0194M-08 Revision
Dec. 1, 2007 A0194_A0194M-07B Revision
March 1, 2007 A0194_A0194M-07A Revision
Feb. 1, 2007 A0194_A0194M-07 Revision
June 15, 2006 A0194_A0194M-06A Revision
March 15, 2006 A0194_A0194M-06 Revision
Dec. 1, 2005 A0194_A0194M-05B Revision
Sept. 15, 2005 A0194_A0194M-05A Revision
July 1, 2005 A0194_A0194M-05 Revision
July 1, 2004 A0194_A0194M-04A Revision
Jan. 1, 2004 A0194_A0194M-04 Revision
Oct. 28, 2003 A0194_A0194M-03B Revision
Jan. 10, 2003 A0194_A0194M-03 Revision
Oct. 10, 2001 A0194_A0194M-01A Revision
Oct. 10, 2001 A0194_A0194M-01 Revision
Oct. 10, 2001 A0194_A0194M-00B Revision
Oct. 10, 2001 A0194_A0194M-00A Revision
Not Available A0194_A0194M-98B Revision