Standard Specification for Carbon Steel, Alloy Steel, and ...

1 Designation: A194/A194M 16 Endorsed by Manufacturers Standardization Society of the Valve and Fittings Industry Used in USNRC-RDT standards Standard Specification for Carbon steel , Alloy steel , and Stainless steel Nuts for Bolts for High Pressure or High Temperature Service, or Both1. This Standard is issued under the fixed designation A194/A194M; 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.

2 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 This specification2 covers a variety of Carbon , Alloy , and ASTM standards :3. martensitic stainless steel nuts in the size range 1 4 through 4 in. A153/A153M Specification for Zinc Coating (Hot-Dip) on and metric M6 through M100 nominal. It also covers austenitic Iron and steel Hardware stainless steel nuts in the size range 1 4 in.

3 And M6 nominal and A276 Specification for Stainless steel Bars and Shapes above. These nuts are intended for high-pressure or high- A320/A320M Specification for Alloy - steel and Stainless temperature service, or both. Grade substitutions without the steel Bolting for Low-Temperature Service purchaser's permission are not allowed. A370 Test Methods and Definitions for Mechanical Testing Bars from which the nuts are made shall be hot- wrought . of steel Products The material may be further processed by centerless grinding A962/A962M Specification for Common Requirements for or by cold drawing.

4 Austenitic stainless steel may be solution Bolting Intended for Use at Any Temperature from Cryo- annealed or annealed and strain-hardened. When annealed and genic to the Creep Range strain hardened austenitic stainless steel is ordered in accor- B633 Specification for Electrodeposited Coatings of Zinc on dance with Supplementary Requirement S1, the purchaser Iron and steel should take special care to ensure that , Supplementary B695 Specification for Coatings of Zinc Mechanically De- Requirement S1, and Appendix X1 are thoroughly understood.

5 Posited on Iron and steel B696 Specification for Coatings of Cadmium Mechanically Supplementary requirements of an optional nature are Deposited provided. These shall apply only when specified in the inquiry, B766 Specification for Electrodeposited Coatings of Cad- contract, and order. mium This specification is expressed in both inch-pound units E112 Test Methods for Determining Average Grain Size and in SI units. However, unless the order specifies the E566 Practice for Electromagnetic (Eddy Current) Sorting of applicable M specification designation (SI units), the mate- Ferrous Metals rial shall be furnished to inch-pound units.

6 F606 Test Methods for Determining the Mechanical Proper- The values stated in either inch-pound units or SI units ties of Externally and Internally Threaded Fasteners, are to be regarded separately as Standard . The values stated in Washers, and Rivets (Metric) F0606_F0606M. each system may not be exact equivalents; therefore, each F1940 Test Method for Process Control Verification to system shall be used independently of the other. Combining Prevent Hydrogen Embrittlement in Plated or Coated values from the two systems may result in non-conformance Fasteners with the Standard .

7 Within the text, the SI units are shown in F1941 Specification for Electrodeposited Coatings on brackets. Threaded Fasteners (Metric) F1941_F1941M. F2329 Specification for Zinc Coating, Hot-Dip, Require- 1. This specification is under the jurisdiction of ASTM Committee A01 on steel , ments for Application to Carbon and Alloy steel Bolts, Stainless steel and Related Alloys and is the direct responsibility of Subcommittee Screws, Washers, Nuts, and Special Threaded Fasteners on steel Forgings and wrought Fittings for piping Applications and Bolting Materials for piping and Special Purpose Applications.

8 Current edition approved May 1, 2016. Published May 2016. Originally --```,``,,`,,`,`,,````,`,```,`,`-`-`,,`, ,`,`,,`--- 3. approved in 1936. Last previous edition approved in 2015 as A194/A194M 15a. For referenced ASTM standards , visit the ASTM website, , or DOI: contact ASTM Customer Service at 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-194 in Section II of that code.

9 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 Copyright ASTM International Provided by IHS under license with ASTM. 1 Licensee=Pentair Valves & Controls US LP/5978909001, User=Tang, Xiaolei No reproduction or networking permitted without license from IHS Not for Resale, 06/26/2016 19:50:08 MDT. A194/A194M 16. ASME standards :4 Options in accordance with , , , , and B Unified Screw Threads 12, and B Gages and Gaging for Unified Inch Screw Threads Supplementary Requirements, if any.

10 B Metric Screw Threads Coatings Coatings are prohibited unless specified by B Square and Hex Nuts the purchaser (see Supplementary Requirements S7 and S8). B Metric Heavy Hex Nuts When coated nuts are ordered, the purchaser should take ISO standards :5 special care to ensure that Appendix X2 is thoroughly under- 4033 Hexagon High Nuts (Style 2) Product A and B stood. 3. Terminology See Supplementary Requirement S3 for nuts to be used Definitions of Terms Specific to This Standard : in low temperature applications (Specification A320/A320M).