Analysis Of Common Causes Of Bolt Breakage-Hydrogen Embrittlement

In the previous article, we shared the Analysis Of Common Causes Of Bolt Breakage-Corrosion. As a professional fastener manufacturer, Xinchi Fastener Company will continue to introduce another cause of bolt breakage-hydrogen embrittlement.

High-strength steel fasteners (generally more than C36 Rockwell hardness) are more prone to hydrogen emittance. Hydrogen embrittlement is the main cause of fastener fracture. Hydrogen embrittlement occurs when hydrogen atoms enter and diffuse throughout the material matrix. When hydrogen atoms enter the material matrix, lattice distortion occurs in the material matrix, destroying the original equilibrium state, so it is easy to crack under external force. When an external load is applied to the screw, the hydrogen atom migrates to the high-stress concentration area, causing extreme stress between the edges of the crystal boundaries, which leads to the breakage of the crystal particles of the fastener.

When a fastener contains a critical state of hydrogen before installation, it will usually break within 24 hours. If hydrogen enters the fastener it is impossible to predict when it will break. Therefore, when using the relevant fasteners, designers should specify the selection of suppliers with specialized process treatment and the use of potential hydrogen embrittlement minimization.

Xinchi Fastener Company is a trustworthy fastener company, especially in furniture nuts. And we are the designated fastener supplier to“STAPLE”. As a trusted fastener supplier,  Xinchi Fastener Company can offer a wide range of high-quality fasteners, including tee nuts, screws, bolts, rivets, washers, etc. If you want to know more about fasteners or want to wholesale fasteners, please feel free to contact us. And then our experienced and expert service team will reply to you as soon as possible.