ASTM A1080/A1080M-24

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Designation: A1080/A1080M − 19 A1080/A1080M − 24
Standard Practice for
Hot Isostatic Pressing of Steel, Stainless Steel, and Related
Alloy Castings
This standard is issued under the fixed designation A1080/A1080M; 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.
1. Scope*
1.1 This practice covers general requirements for hot isostatic pressing (HIP) of steel, stainless steel, and related alloy castings.
1.2 This specification is expressed in both inch-pound units and in SI units; however, unless the purchase order or contract
specifies the applicable M-specification designation (SI units), the inch-pound units shall apply.
1.3 Units—The values stated in either SI units or inch-pound units are to be regarded separately as standard. 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 nonconformance with the standard.
1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility
of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of
regulatory limitations prior to use.
1.5 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
2.1 ASTM Standards:
A703/A703M Specification for Steel Castings, General Requirements, for Pressure-Containing Parts
A781/A781M Specification for Castings, Steel and Alloy, Common Requirements, for General Industrial Use
A957/A957M Specification for Investment Castings, Steel and Alloy, Common Requirements, for General Industrial Use
A985/A985M Specification for Steel Investment Castings General Requirements, for Pressure-Containing Parts
E220 Test Method for Calibration of Thermocouples By Comparison Techniques
2.2 AMS Standard:
AMS 2750 Pyrometry
3. Terminology
3.1 Definitions:
This practice is under the jurisdiction of ASTM Committee A01 on Steel, Stainless Steel and Related Alloys and is the direct responsibility of Subcommittee A01.18
on Castings.
Current edition approved Sept. 1, 2019March 1, 2024. Published September 2019March 2024. Originally approved in 2012. Last previous edition approved in 20152019
as A1080A1080/A1080M – 19. – 15. DOI: 10.1520/A1080_A1080M-19.DOI: 10.1520/A1080_A1080M-24.
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
Available from SAE International (SAE), 400 Commonwealth Dr., Warrendale, PA 15096-0001, http://www.sae.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
A1080/A1080M − 24
3.1.1 autoclave, n—a pressure-containing vessel used in the HIP process.
3.1.2 hot isostatic pressing (HIP), n—a solid-state process which applies heat and pressure simultaneously to objects in an
autoclave via an inert gas in such a way as to eliminate internal voids and obtain desired properties.
3.1.3 inert gas, n—a nonoxidizing gas used for pressurizing a HIP vessel.
4. Ordering Information
4.1 The authorization or requirement for hot isostatic pressing (HIP) shall be agreed upon between purchaser and supplier and
must be documented.
4.1.1 The supplementary requirements of the common requirements specifications contain a section for authorization of hot
isostatic pressing (HIP) of castings. These common requirements specifications include, but are not limited to:
A703/A703M Specification for Steel Castings, General Requirements, for Pressure-Containing Parts
A781/A781M Specification for Castings, Steel and Alloy, Common Requirements, for General Industrial Use
A957/A957M Specification for Investment Castings, Steel and Alloy, Common Requirements, for General Industrial Use
A985/A985M Specification for Steel Investment Castings General Requirements, for Pressure-Containing Parts
5. Processing Parameters
5.1 The HIP processing parameters shall be as agreed upon between the purchaser and supplier.
5.2 The following parameters are commonly used for most steel castings: process castings under an inert atmosphere at not less
than 14 500 psi [100 MPa] within the range of 1975 to 2250 °F [1080 to 1235 °C]. Hold castings at the selected temperature for
2 h minimum and cool under an inert atmosphere to below 795 °F [425 °C].
6. Quality Requirements
6.1 The HIP process shall, at a minimum, document and have traceability for:
6.1.1 Operating parameters for each autoclave/vessel used in production.
6.1.2 Software and instrumentation used for control and documentation purposes.
6.1.3 Gas used to backfill or quench.
6.1.4 Contact fixturing within the autoclave.
6.2 Methods of gas dilution, replenishment, reuse, and purification shall be documented in a written procedure.
6.3 Fixtures, plates, t
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