Table II. — Teniile and Bending Testis of Forged Siliam Sieel containing from 24 per cent, to 8'83 per uni. Silicon. 





3K 

 349 

 MS 



1 -M GES 



— *1W> 



VJ^* Ann«lrfor 

 CoD^tion 



H&dfidd 

 EenatAy 

 Hadfidd 



Eeiuiedy 



Eennedj 

 HadSeM 

 Kennedy 



HadGeld 

 Kennedy 



Radficld 

 Keniiectj 

 Hadfield 



IIodGeia 

 Kcnnei]}' 



li 



S»0 

 3S-0 



36'0 

 S9'JS 



Amount 

 cfsmtdi 



■t Elulic 

 Limit 



2600 

 23-44 



37-6 

 33-00 

 335 



[Tofac 



n»diiciior 



60'Se 



G4-G2 

 6S'3 



Centra dilky, oaUido finely 



cryRloUino 

 Bilky 



Broke in bcmw thread (03" 

 dinmcler) ; Iracturo eoiac- 

 wbat coancly cryitalliiia 



Dtoko In fcrow thread (03" 

 dlikiDcliT); fractDTo «omc- 

 wliut cooraoly ctystallino 



CooTooonil i>U|ibtlygmniiIar 

 Broke In thread; wants and 



groiiutni 

 Kntiroly oml somewhat 



coanely oryitallino 



"X 



, orPrftcturo 



01 Aanenlcd Forced 

 ~u rrom which Tnt- 

 bar wu pnipucd 



Mild and nitborbanil 



Mild, close, granular 



Mild, close, granalor 



Uodulu of 

 El nil icily ly 



Profcwor 

 Kennedy, in 



aqunro inch 



Beading Tot of Aoucoled D 



Tata by Hodfidd 



Bent doable cold . 



Dent doable cold. 



BcDt double cold . 



Bcnl double cold . 



■_| 



ailUnol «loac u-ttlioat bnoklDg. 

 TblitsC-tniliuI a b]uk<nIiIlBl«a 



NOTES. 



1. Hie tests by Protciior Kennedy were made with a lever machine ; these 

 by the anthot with a hydraulic rancbine made by Sir Joseph Whitwortli. 



2. Unfortuoalely, the tests made by ProfesMT Kennedy weie made on ban 

 with boldiue paita only -03" hiigcr than that ooder itrett. The bare were 

 thus much more liable to break ia the thread. In two specimens this occurred, 

 and the lesolt of the~c two <c9tG can hardly be considered complete. 



3. Ia tbe AMiitnortb mnchiao ' permaoeDt ^et ' is mnally ic^dily observed 

 by the 'give ' ot the rmper on dial ; but to lie quite sure on this point, tbe 

 te^t-pieces were takenout and very carefally gauged in a Whitivorth measuring 

 machiDe at eucccss.tc add increuing etresi«*, until tbe permanent Get was dis- 

 oovvred by an actual increase in the length of the test-bar. 



4. The relative bardnesi of olhct substances determined by Mr. Turner's 

 sclerometci : — 



L«wl 1 



Copper 8 



Softest iron 15 



Slild steel 21 



Good cast-i ton :;i to 24 



Hartl cast-iron (scrap) iSC, 



Window glaM CO 



Very baid white iron . . . ■ .73 



Manganese steel Under tcit 



Silicon steel 20 to 3li 



0, These tests will In- (vond plotted on Diagram :!- 



I 



Tot 1 np-broko tlmul Inncouily in 

 pitca.ao Hint > pln» A" IriDS tr^m 

 iiildak flnw rlRlit tmU TIOi piece 

 luelt nu iiauljr Rpintol li — 



