Welding

Welding is the joining of two metal surfaces by raising their temperature sufficiently to melt and fuse them together. This is the method of joining together parts of materials of construction that has been the desire of all from time immemorial. But the difficulties of making a perfect weld and the dangers of defective welding to life and property have for long prevented the general adoption of welding for structures subjected to high stress or very frequent reversal of stress.