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ASTM A758/A758M-00(2005)

Historical Reaffirmation

Standard Specification for Wrought-Carbon Steel Butt-Welding Piping Fittings with Improved Notch Toughness

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1.1 This specification covers wrought-carbon steel butt-welding seamless or welded fittings specially processed to ensure better notch toughness than that to be expected in fittings manufactured to the requirements of Specification A 234/A 234M.

1.1.1 Included are elbows, caps, tees, reducers, and other type fittings covered by ASME B 16.9.

1.1.2 Heat treatment is required for all fittings.

1.1.3 Fittings with mandatory radiographic examination of welds are included.

1.1.4 Supplementary requirements are provided for use when additional testing or examination is desired.

1.1.5 Cast fittings, and fittings formed from all weld metal, are not included.

1.2 Several type of fittings are provided, as follows:

1.3 It shall be the responsibility of the purchaser to determine whether material meeting the requirements of this specification is satisfactory for the service application.

1.4 This specification is expressed in both inch-pound units and 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. 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 the specification.


This guide covers standard specification for wrought-carbon steel butt-welding seamless or welded fittings specially processed to ensure better notch toughness. Heat treatment shall be required for all types of fittings. Fittings with mandatory radiographic examination of welds shall be included. Cast fittings and fittings formed from all weld metal, shall not be included. Heat or cast analysis shall be conducted wherein the material shall conform to the required chemical components for carbon, manganese, phosphorus, sulfur, silicon, vanadium, chromium, nickel, molybdenum, copper, and lead. The fittings, as represented by tensile test specimens taken subsequent to final heat treatment, shall conform to the specified values of tensile strength, yield strength, and elongation for the applicable grades of steel. Mechanical tests such as tension test and transverse guided weld bend test shall be performed on the fittings.


SDO ASTM: ASTM International
Document Number A758
Publication Date Sept. 10, 2000
Language en - English
Page Count 5
Revision Level 00(2005)
Supercedes
Committee A01.22
Publish Date Document Id Type View
May 1, 2024 A0758_A0758M-24 Revision
Oct. 1, 2014 A0758_A0758M-14 Revision
Oct. 1, 2013 A0758_A0758M-13 Revision
Nov. 1, 2010 A0758_A0758M-10 Revision
Oct. 1, 2009 A0758_A0758M-09 Revision
Sept. 10, 2000 A0758_A0758M-00 Revision
Dec. 1, 2019 A0758_A0758M-14R19 Reaffirmation
Sept. 10, 2000 A0758_A0758M-00R05 Reaffirmation