Home>ASTM Standards>ASTM A982-10(R2020) pdf free download

ASTM A982-10(R2020) pdf free download

ASTM A982-10(R2020) pdf free download.Standard Specification for Steel Forgings, Stainless, for Compressor and Turbine Airfoils
1. Scope
1.1 This specification covers stainless steel forgings for compressor and turbine bucket, blade, and airfoil applications. 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 designation (SI units), the inch- pound units shall apply. 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 necessarily exact equivalents; therefore, to ensure conformance with the standard, each system shall be used independently of the other, and values from the two systems shall not be combined. 1.3 This international standard was developed in accor- dance with internationally recognized principles on standard- ization established in the Decision on Principles for the Development of International Standards, Guides and Recom- mendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
3. Ordering Information
3.1 In addition to the ordering information required by Specification A788/A788M, the purchaser shall include a sketch or written description ofthe forging with the inquiry and order.
4. General Requirements
4.1 Materials supplied to this specification shall conform to the requirements of Specification A788/A788M, which out- lines additional ordering information, manufacturing requirements, testing and retesting methods and procedures, marking, certification, product analysis variations and addi- tional supplementary requirements. 4.2 If the requirements of this specification are in conflict with the requirements of Specification A788/A788M, the requirements of this specification shall prevail.
5. Manufacture
5.1 Melting Process—All melting processes ofSpecification A788/A788M are permitted unless Supplementary Require- ment S1 is invoked by the purchaser. 5.2 Forging Process—Either the closed impression die or the open die forging processes may be utilized unless the purchaser specifies one or the other. 5.2.1 Forging Temperature—The maximum part tempera- ture during forging shall be 2150 °F [1175 °C]. 5.3 Heat Treatment—Heat treating all forgings is required in accordance with Table 1 to develop the required mechanical properties. 5.3.1 Number of Heat Treatments—Two complete heat treatments, consisting of an austenitize, quench, and temper, are permitted. Purchaser approval is required prior to any additional heat treatments. 5.3.2 Temperature Variation—Heat treating temperatures shall be controlled in the range of 625 °F [614 °C]. 5.4 Stress Relief—When heat treatment for mechanical properties is followed by straightening, a stress-relieving heat treatment is required at a temperature meeting the requirements of Table 1.
7. Mechanical Properties
7.1 Tension, Impact, and Hardness Tests—All testing shall be performed after heat treatment and stress relief, as appli- cable. The test specimens shall meet the requirements of Table 3. 7.1.1 Number of Tests—A minimum of two forgings from each lot shall be randomly selected for longitudinal tensile, impact, and hardness testing. Hardness values of the tension test specimen shall be reported with the tensile data. Lot Size—A lot shall consist of all forgings of the same size from one electric furnace heat of steel and heat treated either in the same charge in either a batch furnace or a continuous type furnace. Continuous Heat Treating Furnaces—Test forgings shall be taken from each ofthe first and last push or tray to exit the furnace. Additional forgings shall be taken so that the maximum time between samples is 4 h.

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