Standard Specification for Precipitation-Hardening Bolting (UNS N07718) for High Temperature Service
STANDARD published on 1.7.2026
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Designation standards: ASTM A1014/A1014M-26
Publication date standards: 1.7.2026
The number of pages: 4
Approximate weight : 12 g (0.03 lbs)
Country: American technical standard
Category: Technical standards ASTM
This specification covers a precipitation hardening bolting material (UNS N07718) for high temperature service. The alloy shall be multiple melted using consumable electrode practice in the remelt cycle or shall be induction melted under vacuum. Requirements for solution treatment, precipitation heat treatment, straightening, and thread forming by rolling are detailed. Remelt ingots shall conform to the chemical composition requirements (as to chemical and product analyses) prescribed for the following elements: carbon, manganese, silicon, phosphorus, sulfur, chromium, cobalt, molybdenum, columbium, titanium, aluminum, boron, iron, copper, and nickel. Tensile, hardness, and stress rupture tests shall be performed and test specimen shall meet the requirements specified for tensile strength, yield strength, elongation, Brinell hardness, and stress rupture. The method of determining the minimum full size breaking strength for headed fastener is given. Metallography shall be taken for microstructure and macrostructure properties including grain size and flow lines.
Keywords:
bolting, bolting materials, bolting components, Inconel 718, nickel alloy, precipitation hardening, temperature service application – high,, ICS Number Code 77.140.30 (Steels for pressure purposes)