ASTM A350/A350M-18

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

ABSTRACT
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.
SCOPE
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.

General Information

• Status: Historical
• Publication Date: 30-Apr-2018
• ICS: 23.040.40 - Metal fittings
• Technical Committee: A01 - Steel, Stainless Steel and Related Alloys
• Drafting Committee: A01.22 - Steel Forgings and Wrought Fittings for Piping Applications and Bolting Materials for Piping and Special Purpose Applications

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation: A350/A350M − 18
Standard Specification for
Carbon and Low-Alloy Steel Forgings, Requiring Notch
1
Toughness Testing for Piping Components
This standard is issued under the fixed designation A350/A350M; 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.
A superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
This standard has been approved for use by agencies of the U.S. Department of Defense.
1. Scope* Development of International Standards, Guides and Recom-
2 mendations issued by the World Trade Organization Technical
1.1 This specification covers several grades of carbon and
Barriers to Trade (TBT) Committee.
low-alloy steel forged or ring-rolled flanges, forged fittings and
valves intended primarily for low-temperature service and
2. Referenced Documents
requiring notch toughness testing. They are made to specified
3
2.1 ASTM Standards:
dimensions, or to dimensional standards, such as the ASME
A788/A788M Specification for Steel Forgings, General Re-
and API Specifications referenced in Section 2. Although this
quirements
specification covers some piping components machined from
A961/A961M Specification for Common Requirements for
rolled bar and seamless tubular materials (see 5.3.3), it does not
Steel Flanges, Forged Fittings, Valves, and Parts for
cover raw material produced in these product forms.
Piping Applications
1.2 No limitation on size is intended beyond the ability of
2.2 ASME Standards:
the manufacturer to obtain the specified requirements.
4
B 16.5 Steel Pipe Flanges and Flanged Fittings
However, Class 3 of Grade LF787 is only available in the
4
B 16.9 Factory-Made Wrought Steel Butt-Welding Fittings
quenched-and-precipitation heat treated condition.
B 16.10 Face-to-Face and End-to-End Dimensions of Fer-
4
1.3 Supplementary requirements are provided for use when
rous Valves
additional testing or inspection is desired. These shall apply
B 16.11 Forged Steel Fittings, Socket-Welding and
4
only when specified by the purchaser in the order.
Threaded
4
B 16.30 Unfired Pressure Vessel Flange Dimensions
1.4 This specification is expressed in both inch-pound units
4
B 16.34 Valves-Flanged, Threaded, and Welding End
and in SI units. However, unless the order specifies the
4
B 16.47 Large Diameter Steel Flanges
applicable “M” specification designation (SI units), the mate-
2.3 ASME Boiler and Pressure Vessel Code:
rial shall be furnished to inch-pound units.
2
Section IX
1.5 The values stated in either SI units or inch-pound units
2.4 AWS Standards:
are to be regarded separately as standard. Within the text, the
5
A 5.1 Mild Steel Covered Arc-Welding Electrodes
SI units are shown in brackets. The values stated in each
5
A 5.5 Low-Alloy Steel Covered Arc-Welding Electrodes
system may not be exact equivalents; therefore, each system
6
2.5 API Standards:
shall be used independently of the other. Combining values
600 Steel Gate Valves with Flanged or Butt-Welding Ends
from the two systems may result in non-conformance with the
602 Compact Design Carbon Steel Gate Valves for Refinery
standard.
Use
1.6 This international standard was developed in accor-
605 Large Diameter Carbon Steel Flanges
dance with internationally recognized principles on standard-
ization established in the Decision on Principles for the
3
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
1
This specification is under the jurisdiction of ASTM Committee A01 on Steel, Standards volume information, refer to the standard’s Document Summary page on
Stainless Steel and Related Alloys and is the direct responsibility of Subcommittee the ASTM website.
4
A01.22 on Steel Forgings and Wrought Fittings for Piping Applications and Bolting Available from American Society of Mechanical Engineers (ASME), ASME
Materials for Piping and Special Purpose Applications. International Headquarters, Two Park Ave., New York, NY 10016-5990, http://
Current edition approved May 1, 2018. Published June 2018. Originally www.asme.org.
5
approved in 1952. Last previous edition approved in 2017 as A350/A350M – 17. Available from American Welding Society (AWS), 550 NW LeJeune Rd.,
DOI: 10.1520/A0350_A0350M-18. Miami, FL 33126, http://www.aws.org.
2 6
For ASME Boiler and Pressure Vessel Code applications see related Specifi- Available from American Petroleum Institute (API), 1220 L. St., NW,
cation SA-350 in Section II of that Code. Washington, DC 20005-4070, http://api-ec.api.org.
*A Summary of Changes section appears at the end of this standard
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box
...

This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation: A350/A350M − 17 A350/A350M − 18
Standard Specification for
Carbon and Low-Alloy Steel Forgings, Requiring Notch
1
Toughness Testing for Piping Components
This standard is issued under the fixed designation A350/A350M; 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.
A superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
This standard has been approved for use by agencies of the U.S. Department of Defense.
1. Scope Scope*
2
1.1 This specification 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.
2. Referenced Documents
3
2.1 ASTM Standards:
A788/A788M Specification for Steel Forgings, General Requirements
A961/A961M Specification for Common Requirements for Steel Flanges, Forged Fittings, Valves, and Parts for Piping
Applications
2.2 ASME Standards:
4
B 16.5 Steel Pipe Flanges and Flanged Fittings
4
B 16.9 Factory-Made Wrought Steel Butt-Welding Fittings
4
B 16.10 Face-to-Face and End-to-End Dimensions of Ferrous Valves
4
B 16.11 Forged Steel Fittings, Socket-Welding and Threaded
4
B 16.30 Unfired Pressure Vessel Flange Dimensions
4
B 16.34 Valves-Flanged, Threaded, and Welding End
4
B 16.47 Large Diameter Steel Flanges
1
This specification is under the jurisdiction of ASTM Committee A01 on Steel, Stainless Steel and Related Alloys and is the direct responsibility of Subcommittee A01.22
on Steel Forgings and Wrought Fittings for Piping Applications and Bolting Materials for Piping and Special Purpose Applications.
Current edition approved Sept. 1, 2017May 1, 2018. Published September 2017June 2018. Originally approved in 1952. Last previous edition approved in 20152017 as
A350/A350M – 15.A350/A350M – 17. DOI: 10.1520/A0350_A0350M-17.10.1520/A0350_A0350M-18.
2
For ASME Boiler and Pressure Vessel Code applications see related Specification SA-350 in Section II of that Code.
3
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
4
Available from American Society of Mechanical Engineers (ASME), ASME International Headquarters, Two Park Ave., New York, NY 10016-5990, http://
www.asme.org.
*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
1

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A350/A350M − 18
2.3 ASME Boiler and Pressure Vessel Code:
2
Section IX
2.4 AWS Standards:
5
A 5.1 Mild Steel Covered Arc-Welding E
...