TraiisiiitioiLs Society Xaval An/iilrrl.s and Mariiir Kiii^iiurrs. \'ot. jo, uji2. 



To illustnilc fxilxi- on " Tool Steel for llic U. S. Navy,' 

 by Lewis Ilolntrl Keniiey, B. S., M. li., Member. 



I'bllc IJIJ 



Fio. 4. 



Fic. v 



pJr' I'^rT^ M^- "" ^~^' ''^°'^ ^""^ S°- '-'■ Pi°- 3-Card No. 5, A-3, from Tool No. 4-3. 



Fig. 2-Card No. 4, B-2, from Tool No. 3-2. Fig. 4-Card No. 6, B-3, from Tool No. T-l 



Fig. 5— Card No. 8, B-4, from Tool No. 2-4. 



Photomicrographs of Selective Test Tools, 550X Tungsten Tool Steel, Class i, Schedule 4469. 



