364 



TOOL STEEL FOR THE UNITED STATES NAVY. 



APPENDIX C. 



SPECIFICATIONS (47 S5) FOR TOOI, STEEL ISSUED BY THE NAVY DEPARTMENT 



JUI<Y 20, I9II. 



(Superseding "Specifications 47S5," issued January 5, 1909.) 

 Chemical Composition. 



Tungsten steel. 



Carbon . . . . 

 Chromium . 

 Manganese . 

 Phosphorus 



Silicon 



Sulphur 



Tungsten... 

 Vanadium.. 

 Iron 



Class t. 



Per cent limit. 



0.75 to 0.55 



$.00 to 3.;o 



.30 to .05 



.01; to .00 



.30 to .00 



.03 to .00 



30.00 to 16.00 



.. to .35 



Remainder. 



Class 3. 



Per cent limit. 



1.50 to 1.3; 



Optional. 

 .30 to .10 

 .015 to .00 

 .30 to .00 

 .03 to .00 

 5.00 to 3.00 

 Optional. 

 Remainder. 



