Excerpt from Spot and Arc Welding
The essential consideration for those who practice the art of electric welding is the character of the materials to be joined. As a matter of fact, this principle has been the basis of all successful engineering achievement and a lack of it the cause for many vital failures. The wide range of processes combined with ingenious designs permits the broad statement of probability that all the metals and their alloys may in varying degrees be held together by electric methods. This provides a varied and interesting field for the engineer although, like untilled ground, there will be found many obstacles in the way of cultivation. The success of the harvest will be in direct proportion to the thought bestowed upon the actions of the metals when under the treatment required for their jointure.
It is not proposed to consider here the welding of the soft metals such as gold, silver, copper, tin, zinc, aluminum, etc. It is sufficient to affirm that in small articles processes of electric welding have been devised that satisfactorily accomplish such joints as are needed for special industries. The processes employed are fully described in many published articles. As metal is added to the objects joined the method is referred to as soldering rather than welding.
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