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Fasteners are used in every industry. In order to achieve the necessary high strength, durability and corrosion resistance, high-performance fasteners must be heat treated.
Hydrogen embrittlement of fasteners is a result of electrochemical surface treatments whereby hydrogen (in atomic form) enters the lattice of the steel and causes microcracks in the structure, followed by mechanical failure.
The Fastenal Company, a well-known name in the heat treatment industry, has invested more than $7 million in the past two years to bring secondary processes in-house, including a heat-treat department.
The effect of hydrogen on aluminum alloys can manifest itself in a phenomenon known as high-temperature oxidation (HTO), also known as high-temperature deterioration (HTD).
Alcoa Fastening Systems (AFS), a unit of Alcoa, signed a strategic technology and commercial cooperation agreement with Commercial Aircraft of China Ltd. (COMAC).