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AS4877D - Bolts and Screws, Nickel Alloy UNS N07718, Classification: 185 ksi/1200 °F, Procurement Specification

Details
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Document Number: AS4877D
Project Initiation: 09-12-2012
Project Number: PE25-12-89TGB
Revision Number: D
Sponsor Name:
Title
Bolts and Screws, Nickel Alloy UNS N07718, Classification: 185 ksi/1200 °F, Procurement Specification
Scope
This procurement specification covers bolts and screws made from a corrosion and heat resistant, age hardenable nickel base alloy of the type identified under the Unified Numbering System as UNS N07718. Classification: a. tensile strength at room temperature 185 ksi minimum, b. maximum test temperature of parts 1200 degrees F, c. tensile strength at 1200 degrees F 145 ksi minimum, and d. stress rupture: 100 ksi stress rupture strength at 1200 degrees F.<p>Primarily for use in aerospace propulsion systems as follows: a. for use up to approximately 1200 degrees F where elevated temperature tensile strength, stress-rupture strength, and resistance to relaxation are required, and b. for use up to approximately 800 degrees F where fatigue resistance and tensile strength are required.
Rationale
Revise cleaning/passivation requirements to harmonize with other Inco 718 specification.
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