. Canadian foundryman (1918). ing pro-cesses is generated by a boiler placedover the annealing furnace flues. Research Department The research department continues material, appearance of surface, heft orweight, ring or tone of metal when drop-ped, feeling, intuition, smell, fracturetest, fire and water test, service test,and spark test. The first two are the most dependablemethods, except that if the steel is kept October, 1918. CANADIAN FOUNDRYMAN 253 in a damp place the labels will drop offin the course of time due to rust. Thethird method is dependable if a generalscheme of colors is used
. Canadian foundryman (1918). ing pro-cesses is generated by a boiler placedover the annealing furnace flues. Research Department The research department continues material, appearance of surface, heft orweight, ring or tone of metal when drop-ped, feeling, intuition, smell, fracturetest, fire and water test, service test,and spark test. The first two are the most dependablemethods, except that if the steel is kept October, 1918. CANADIAN FOUNDRYMAN 253 in a damp place the labels will drop offin the course of time due to rust. Thethird method is dependable if a generalscheme of colors is used for the differentbrands of steel and the system is intel- It is surprising how many expert tooi-men will select material by intuition;and because of their opinion they workthe tool into shape regardless of any in-dication in its cutting properties that the SS&SSuk : • • !• • nHBtf 5% ,.rap • %^ ,*..! 1 JB> IS :::#:;;•:• • • •• » • • i • • Tn^>v ~~~--»— «2| • .. In Fig. 8 several of these furnaces are shown, while in Fig. 9 is shown a corner of the Pickling Department ligently applied. There is, however, inmany factories extreme carelessness andindifference in the painting of valuablestock; in one factory seven grades ofstetel were painted one color. Shape Many workmen select steel by itsgeneral shape; for instance, a hexagonsection will represent screw stock andan octagon section will indicate coldchisel steel. But this method of select-ing should not be tolerated, because steelcan be manufactured into any form orshape desired, except stellite, which iscast into form. It may surprise someengineers to learn that many tool steelsare selected by the appearance of thesurface. If the bars are smooth andhave sharp corners, it is evidence to theworkmen of first-class steel. Withoutother evidence, expensive labor ia putupon the tool and usually only whenhardening is the mistake surfaces and sharp corners indi-cate work at low
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