Lifting Eye Bolts Surface Treatment

1. Lifting eye bolts should be made of 20 or 25 steel (GB699). 2. Lifting eye bolts must be forged as a whole. The forgings should be normalized, and the oxide scale should be removed. The grain size of the finished product should not be lower than Grade 5 (GB6394), and the forging should not have overburning or cracking defects. Generally, surface treatment is not carried out, but according to the application requirements, surface treatments such as galvanizing passivation and chrome plating can be carried out, and according to the provisions of GB5267-85. Dehydrogenation treatment should be carried out immediately after electrogalvanization.