Four years ago Herbert W. Graham, supervising metallurgist for the fourth largest U. S. steel maker, Jones & Laughlin, persuaded his company to build a miniature steel mill for research. This $175,000 toy mill's open-hearth furnace, ingot molds, soaking pit and rollers produce one-inch square bars.
Last week, as result of experiments in the little Pittsburgh "pilot mill." J. & L. introduced a new process which it hopes will give the company dominance of the seamless pipe market. Hitherto manganese, the element which gives, steel its pliability, has been apt to cluster...
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