. Journal. se. Sul-phur. Phos-phorus. Copper. fA. \ 450°—560°C o-4(j 0-13 0-S9 o-oi 0-028 0-08 0-17 0-13 0-92 o-oi 0-029 000 USO0—880°C. 0-32 0-17 0-OG 0-03 0-021 0-03 r .. o-i. o-ot 1-10 n-l«i 0-04 ; 430°—M0°C. 0-17 0-03 1-09 O-03 11-09! O-04 1780°—880°C. 0-05 o-io 0-93 0-03 o-ioi 0-03 °—560°°—8S0°C. 0-02 0-07 0-27 0-05 o-on 0-041 0-02 0-07 0-28 0-07 0-039 o-oi Trace 0-08 0-28 0-07 o-on 0-02 Preliminary experiments were conducted to determinethe best method of heating the test-pieces and the timeduring which it was necessary to subject them to thetemperature of the l
. Journal. se. Sul-phur. Phos-phorus. Copper. fA. \ 450°—560°C o-4(j 0-13 0-S9 o-oi 0-028 0-08 0-17 0-13 0-92 o-oi 0-029 000 USO0—880°C. 0-32 0-17 0-OG 0-03 0-021 0-03 r .. o-i. o-ot 1-10 n-l«i 0-04 ; 430°—M0°C. 0-17 0-03 1-09 O-03 11-09! O-04 1780°—880°C. 0-05 o-io 0-93 0-03 o-ioi 0-03 °—560°°—8S0°C. 0-02 0-07 0-27 0-05 o-on 0-041 0-02 0-07 0-28 0-07 0-039 o-oi Trace 0-08 0-28 0-07 o-on 0-02 Preliminary experiments were conducted to determinethe best method of heating the test-pieces and the timeduring which it was necessary to subject them to thetemperature of the lead bath. It was found that althoughthe rapidity with which the full alteration in propertieswas produced, varied, yet a period of five minutes generallysufficed; this time was therefore taken for the rest of theexperiments. Jan. so, 1892.] THE JOURNAL OF THE SOCIETY OP CHEMICAL INDUSTRY. 41 The result of these experiments is most compactlyshown in the following tables of curves :—. of Heat upon the Properties of Ironand Steel. The temperatures must be taken as approximate only. Certain other experiments were carried out, both toconfirm the results quoted* above, and to determine theelectrical and magnetic relations of the test specimensbefore and after heating; the conclusions arrived at arerecorded below: — (1.) The samples examined suffered no appreciable changeby heating in a lead bath to 475° C. An alteration was firstperceptible when the temperature reached 889° 0., and wasthen confined to the diminution of the percentage ofcombined carbon. No lead was absorbed from the bath inany ease. (2.) The length of time during which the samples wereexposed to a high temperature had an influence upon theirtensile strength and extension, which varied with thecharacter of the sample. The effect was the more markedthe higher the tensile strength, hut in all cases was completein five minutes ; in the case of sample A (crucible caststeel), althoug
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectchemist, bookyear1882
