Forging pipe under a power hammer is all about control. The machine delivers force fast — but the smith controls the outcome. Heat, timing, and positioning determine whether the pipe shapes cleanly or ...

First, welding began to replace riveting in ship-and plane-building (TIME. Dec. 15). Now cast steel is replacing forged steel, and in tanks it is replacing both riveted and welded armor plate.

This section of the industry may be classified as jobbing with quantities generally small varying from one off to perhaps 100 off. Tooling for producing open die work may consist of flat or shaped ...