Alloy 2.4668 bolt Inconel 718 hex bolt DIN931
Inconel bolt fasteners consist of three parts – a head at the top, a long cylinder with external threads, and a chamfer at the bottom.
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Inconel 718 is a nickel-chromium alloy with the addition of niobium for excellent resistance to high temperature oxidation. Alloy 718 used in the petroleum industry is heat treated to a hardness not exceeding 40HRC, the maximum value allowed by NACE MR-01-75 to prevent stress corrosion cracking. The main applications in this area are gate valves, throttle stems, fasteners, tubing hangers and fire dampers.
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