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ASTM A350/A350M-24a

Historical Revision

Standard Specification for Carbon and Low-Alloy Steel Forgings, Requiring Notch Toughness Testing for Piping Components

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1.1 This specification2 covers several grades of carbon and low-alloy steel forged or ring-rolled flanges, forged fittings and valves intended primarily for low-temperature service and requiring notch toughness testing. They are made to specified dimensions, or to dimensional standards, such as the ASME and API Specifications referenced in Section 2. Although this specification covers some piping components machined from rolled bar and seamless tubular materials (see 5.3.3), it does not cover raw material produced in these product forms.

1.2 No limitation on size is intended beyond the ability of the manufacturer to obtain the specified requirements. However, Class 3 of Grade LF787 is only available in the quenched-and-precipitation heat treated condition.

1.3 Supplementary requirements are provided for use when additional testing or inspection is desired. These shall apply only when specified by the purchaser in the 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 SI units or inch-pound units are to be regarded separately as standard. Within the text, the SI units are shown in brackets. 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.

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 several grades of carbon and low alloy steel forged or ring-rolled flanges, forged fittings and valves for low-temperature service. The steel specimens shall be melt processed using open-hearth, basic oxygen, electric furnace or vacuum-induction melting. A sufficient discard shall be made to secure freedom from injurious piping and undue segregation. The materials shall be forged and shall undergo heat treatment such as normalizing, tempering, quenching and precipitation heat treatment. Heat analysis and product analysis shall be performed wherein the steel materials shall conform to the required chemical compositions of carbon, manganese, phosphorus, sulfur, silicon, nickel, chromium, molybdenum, copper, columbium, vanadium, and nitrogen. The materials shall also undergo tension tests and shall conform to the required values of tensile strength, yield strength and elongation. Impact tests shall also be performed and the steel materials shall conform to the required values of minimum impact energy, temperature, and minimum equivalent absorbed energy. Hardness and hydrostatic tests shall also be performed.


SDO ASTM: ASTM International
Document Number A350
Publication Date May 1, 2024
Language en - English
Page Count 11
Revision Level 24a
Supercedes
Committee A01.22
Publish Date Document Id Type View
Oct. 15, 2024 A0350_A0350M-24B Revision
May 1, 2024 A0350_A0350M-24A Revision
March 1, 2024 A0350_A0350M-24 Revision
May 1, 2023 A0350_A0350M-23 Revision
May 1, 2018 A0350_A0350M-18 Revision
Sept. 1, 2017 A0350_A0350M-17 Revision
May 1, 2015 A0350_A0350M-15 Revision
Oct. 1, 2014 A0350_A0350M-14 Revision
Oct. 1, 2013 A0350_A0350M-13 Revision
March 1, 2012 A0350_A0350M-12 Revision
Oct. 1, 2011 A0350_A0350M-11 Revision
Nov. 1, 2010 A0350_A0350M-10 Revision
Nov. 1, 2007 A0350_A0350M-07 Revision
Oct. 1, 2004 A0350_A0350M-04A Revision
March 1, 2004 A0350_A0350M-04 Revision
Sept. 10, 2002 A0350_A0350M-02B Revision
June 10, 2002 A0350_A0350M-02A Revision
March 10, 2002 A0350_A0350M-02 Revision
March 10, 2002 A0350_A0350M-00C Revision
March 10, 2002 A0350_A0350M-00B Revision
Not Available A0350_A0350M-97 Revision