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
AS6416 added, specs updated throughout document, paragraphs 3.6, 126.96.36.199.1, 188.8.131.52.3 and 184.108.40.206 updated, paragraph 3.7.2 magnification changed from X100 to X200, paragraph 220.127.116.11.2 deleted, Figures 1A, 1B, and 1C deleted, Figures updated, Table 1 load values rounded, and Table 2 edited.