MATERIALS 



49 



5 This class of alloys is covered by A.S.T.M. Tentative Specification A172-35T. 

 > This class of alloys is covered by A.S.T.M. Tentative Specification A173-35T. 

 ^ This class of alloys is covered by A.S.T.M. Tentative Specification A171-35T. 

 ' This class of alloys is covered by A.S.T.M. Tentative Specification A175-35T. 



