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

Standard:
Reaffirmed:
  • 2004-02-05
 
  • HISTORICAL Access the latest revision: AS4877G
Publisher:
  • SAE International
Pages:
18
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.

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:

Mechanical test criteria defined in procurement specification is in conflict with that defined in NASM 1312. To eliminate conflict, Aerospace Standards are being revised to eliminate conflict and rely on NASM 1312.

History:
Standard Published Revision Status
AS4877G 2017-10-18 Latest Revised
2017-01-04 Historical Revised
2015-12-19 Historical Revised
2015-01-09 Historical Revised
2012-03-10 Historical Revised
2004-11-08 Historical Revised
2004-02-05 Historical Reaffirmed
1995-02-01 Historical Issued
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