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Significance and Use
4.1 HIP of castings should be performed in the as cast condition. Post HIP inspection of castings should result in a reduction of porosity that is evident in x-ray grade and properties.
4.2 HIP will not eliminate inclusions or surface-connected porosity in a casting.
1.1 This guide presents requirements for hot isostatic pressing (HIP) of aluminum alloy castings. HIPing is a process in which components are subjected to the simultaneous application of heat and high pressure in an inert gas medium. The process is to be used for the reduction of internal (non-surface connected) porosity. The document is to describe the general parameters of the HIP process, describe certification procedures and a description that the process has been followed. It is not intended to be a description of a heat treating procedure. This is not meant to supersede an end user’s specification where one exists.
1.2 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 non-conformance with the standard.
1.3 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 and health practices and determine the applicability of regulatory limitations prior to use.
1.4 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 (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.
AMS StandardsAMS 2750
E230/E230M Specification for Temperature-Electromotive Force (emf) Tables for Standardized Thermocouples
ICS Number Code 77.120.10 (Aluminium and aluminium alloys); 77.150.10 (Aluminium products)
UNSPSC Code 31120000(Machined castings); 11172000(Aluminum based alloys)
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ASTM B998-17, Standard Guide for Hot Isostatic Pressing (HIP) of Aluminum Alloy Castings, ASTM International, West Conshohocken, PA, 2017, www.astm.orgBack to Top