152 



W. H. WARREN AND S. H. BARRACLOUGH. 



from similar alloys made on a large scale by experienced steel 

 manufacturers. 



2. Tests of Nickel Steel manufactured in Great Britain. — A 

 valuable paper was contributed by Mr. William Beardmore to 

 the Institution of Naval Architects in April 1897, which deals 

 with tests of nickel steel and its application in steel forgings, more 

 especially in propeller shafts, railway cranks, axles, crank pins, 

 tyres, etc., also in plates for shipbuilding. The following table 

 gives the results of Mr. Beard more's tension tests on carbon and 

 nickel steel showing the characteristic properties of the latter 

 material relatively to carbon steel. 



Comparison of the Yield Point and Break- 

 ing Strain of Nickel and Carbon Steel. 



II 

 II 



Carbon Steel. 



Nickel Steel. 



Ultimate 

 strength, tons 

 per square inch 



Yield point 

 in tons per 

 square inch. 



Ultimate 

 strength, tons 

 per square inch. 



Yield point 

 in tons per 

 spuare inch. 



_3_ 

 1 6 



277 



135 



513 



295 



3 

 1 6 



283 



136 



539 



28-7 



1 

 4 



276 



137 



541 



286 



1 

 4 



275 



13-9 



529 



29-2 



3 



8 



27-7 



14-0 



524 



304 



3 

 8 



28-2 



14-5 



51-8 



306 



i 



28-5 



141 



525 



29-0 



i 



2 



283 



143 



496 



289 



1 



28-5 



14-0 



50-5 



28-5 



1 



279 



140 



510 



28-4 



1 



275 



14-5 



487 



283 



Here the yield point of nickel steel is equal to the ultimate 

 strength of carbon steel. 



Mr. Beardmore states that nickel steel can be bent, punched, 

 drifted and welded successfully ; he also gives some experiments 

 by Mr. Whyte of Leith Docks on the behaviour of nickel steel, 

 mild carbon steel, and wrought iron when exposed to the corrosive 

 action of sea-water for one year, in which the loss of weight was 

 as follows : — 



Nickel steel 1-36%; Carbon steel 1-72%; Wrought iron 1-89%. 



3. Tests of nickel steel from F. Krupp. — The firm of Fried. 

 Krupp of Essen, manufacture substantially two kinds of nickel 



