STRUCTURE AND NATURE OF TROOSTITE 



117 



Fig. 11 — Mag. 3500X. Fig. 11 illustrates the wide range in structure to be 

 found in hardened steel. The background is martensite whicn contains a troostitic 

 nodule. One grain of the nodule is fully laminated pearlite. The other grains are 

 in all stages of stratification. 



