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While a chain sling was being used to lift a casting one of the links ruptured. The sling, reputed to be of the electrically-welded steel type, was at least eight years old and had been overhauled several times during its working life. Examination showed the links were scarf-welded. Furthermore, the welds were at the ends and not at the sides as is usual in the case of electrically-welded chains. A transverse section from one side of a link was examined microscopically. This showed the material to be wrought-iron of satisfactory quality. It was concluded this chain sling had been...

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