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SAE AS7474 Revision C, October 1, 2011
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Bolts and Screws, Steel, Corrosion Resistant, UNS S17400 Tensile Strength 140 ksi Procurement Specification
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AIA/NAS Aerospace Standards
Type This specification covers bolts and screws made from a corrosion and heat resistant, martensitic iron base alloy of the type identified under the Unified Numbering System as UNS S17400. The following specification designations and their properties are covered:

AS7474

140 ksi minimum ultimate tensile strength at room temperature

100 ksi stress corrosion test

72 ksi to 7.2 ksi tension-tension fatigue

AS7474-1

140 ksi minimum ultimate tensile strength at room temperature

100 ksi stress corrosion test

88 ksi minimum ultimate shear strength at room temperature

Application

Primarily for aerospace propulsion system applications where corrosion resistance and high strength in tension is required in temperatures not to exceed 600 °F.

Safety - Hazardous Materials

While the materials, methods, applications, and processes described or referenced in this specification may involve the use of hazardous materials, this specification does not address the hazards which may be involved in such use. It is the sole responsibility of the user to ensure familiarity with the safe and proper use of any hazardous materials and to take necessary precautionary measures to ensure the health and safety of all personnel involved.