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          ASTM A860 A860M Standard Specification for Wrought High-Strength Low-Alloy Steel Butt-Welding Fittings.

          ASTM A860 A860M Standard Specification for Wrought High-Strength Low-Alloy Steel Butt-Welding Fittings.

          1. SCOPE

          1.1 This specification covers wrought high-strength lowalloy steel butt-welding fittings of seamless and electric fusion welded

          construction covered by the latest revisions of ASME B16.9, ASME 16.28, and MSS-SP-75. Butt-welding fittings differing from these ASME and MSS standards shall be furnished in accordance with Supplementary Requirement S58 of Specification A 960/A 960M. These fittings are for use in high-pressure gas and oil transmission and distribution systems.

          1.2 Optional supplementary requirements are provided for fittings when a greater degree of examination is desired. One or more of the supplementary requirements may be specified in the order.

          1.3 This specification does not cover cast-welding fittings or fittings machined from castings.

          1.4 The values stated in either inch-pound units or SI units are to be regarded separately as standard. Within the text, the SI units are shown in brackets. 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 this specification. Unless the order specifies the applicable “M” specification designation (SI units), the material shall be furnished to inch-pound units.

          2. Referenced Documents

          2.1 ASTM Standards:

          A 370 Test Methods and Definitions for Mechanical Testing of Steel Products

          A 751 Test Methods, Practices, and Terminology for Chemical Analysis of Steel Products

          A 960/A 960M Specification for Common Requirements for Wrought Steel Piping Fittings

          2.2 ASME Standards:3

          B16.9 Steel Butt-Welding Fittings

          B16.28 Wrought Steel Buttwelding Short Radius Elbows and Returns

          2.3 AWS Standard:

          AWS 5.18 Specification for Carbon Steel Metals for Gas Shielded Arc Welding4

          2.4 ASME Boiler and Pressure Vessel Code:3

          Section V, Nondestructive Examination

          Section VIII, Division 1, Pressure Vessels

          Section IX , Welding and Brazing Qualifications

          2.5 MSS Standards:5

          MSS SP-25 The Standard Marking System of Valves, Fittings, Flanges and Unions

          MSS-SP-75 Specification for High Test Wrought Butt-Welding Fittings

          2.6 American Society of Nondestructive Testing:6

          SNT-TC-1A Recommended Practice for Nondestructive Testing Personnel Qualification and Certification

          3. Ordering Information

          3.1 In addition to the requirements of Specification A 960/A 960M, the following ordering information applies:

          3.1.1 Grade Symbol,

          3.1.2 Requirements for certification of test report.

          4. General Requirements

          4.1 Product furnished to this specification shall conform to the requirements of Specification A 960/A 960M, including any supplementary requirements that are indicated in the purchase order. Failure to comply with the general requirements of Specification A 960/A 960M constitutes nonconformance with this specification. In case of conflict between the requirements of this specification and Specification A 960/A 960M, this specification shall prevail.

          5. Materials and Manufacture

          Research use only,Commercial use is prohibited.

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