The crane hook is fabricated with eight plates of 25 mm thickness and cut to the required size and dimensions as shown in the figure. The plates are riveted. Each crane hook carries 125 tones load. For this load the stress is found to be high and so high carbon steel with higher yield strength is suggested. After analyzing with different materials, a material is confirmed to be used for the manufacturing the crane hook. High Carbon Steel is suggested to be used as the material which is having high yield strength. A number of materials and designs are chosen for the use of crane hook, but from the different materials like Carbon steel, Cast Steel, SAE 1025Water quenched, SAE 1096 Oil Quenched steel and Stainless steel. Finally Carbon steel give the optimized results and the material is finalized for the fabrication purpose and the crane is working safely without any interruption since three years.
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