ASTM A194:17 pdf download.Standard Specification for Carbon Steel, Alloy Steel, and Stainless Steel Nuts for Bolts for High Pressure or High Temperature Service, or Both.
4. Ordering Information
4. 1 The inquiry and order for bolting material and bolting components under this specification shall include the following as required to describe the items adequately:
4.1.1 Specification designation, year date, and grade, issue date and revision letter.
4. 1 .2 Quantity, number of pieces.
4.1.3 Dimensions (sec Section 9),
4.1.4 Options in accordance with 8.2.2.1, 9.1, 9.2, 10.3, and
12, and
4.1.5 Supplementary Requirements, if any.
4.2 coatings—Coatings are prohibited unless specitied by the purchaser (see Supplementary Requirements S7 and S8). When coated nuts are ordered, the purchaser should take special care to ensure that Appendix X2 is thoroughly understood.
4.3 See Supplementary Requirement S3 for nuts to he used in low temperature applications (Specification A320/A320M).
4.4 Proof Load Testing—See S pplementary Requirement S9 for proof load testing of nuts manufactured to dimensions and configurations other than those covered in Tables 3 and 4.
5. Common Requirements
5.1 Bolting material and bolting components supplied to this specification shall conform to the requirements of Specification A962/A962M. of which nuts are considered bolting components, as are bolts, studs, screws, and washers intended for use in special service applications. These requirements include test methods, finish, thread dimensions, marking, certification, optional supplementary requirements, and others. Failure to comply with the requirements of Specification A962/A962M constitutes nonconformance with this specification. In case of conflict between the requirements of this specification and Specification A962/A962M, this specification shall prevail.
6. Manufacture (Process)
6.1 Stainless steels for all types of Grade 6 and 8 nuts shall be made by one of the following processes:
6.1.1 Electric-furnace (with separate degassing and refining optional),
6.1 .2 Vacuum induction furnace, or
6.1 .3 Either of the above thllowed by electroslag remelting, or consumable-arc remelting.
6.2 The steel producer shall exercise adequate control to eliminate excessive unhomogeneity, nonmetallics, pipe, porosity, and other defects.
6.3 Grades 1 and 2 nuts shall be hot or cold forged, or shall be machined from hot-forged, hot-rolled, or cold-drawn bars.
6.3.1 All Grade 1 and 2 nuts shall be stress-relieved at a temperature of at least 1000 °F [538 °C] after forming or machining from bar with the following exceptions:
6.3.1.1 Nuts made by hot forging.
6.3.1.2 Nuts machined from hot-forged or hot-rolled bar.
6.3.1.3 Nuts machined from hot-forged/hot-rolled and coldfinished (max 10 % reduction in area) bar.
ASTM A194:17 pdf download
