Abstract
The experiments were made upon arc and gas welded rails to obtain the relations between their strengths and welding practices. Various types of joints and electrodes were used for welding, and .the fracture strengths were measured by bend tests. As the result, the following conclusions were obtained.
1) The arc and gas welded rail joints showed reliable strengths for practical use under satisfactory welding practices. We could classify the qualities of electrodes used and the degrees of workmanship by the fracture strengths and the appearances of fracture surfaces.
2) The arc welding was preferable to the gas welding as a method of rail connecting.
3) It was very important to select a suitable type of electrode and of superior quality to secure good mechanical strengths especially on arc welding. Austenite-type electrodes were also available as well as mild steel electrodes.
4) It was concluded that the Shintsurumi-type point was the best for both the arc and the gas welding.
6) It was recommended to anneal the joint after welding has been completed.
