◎ Elements not listed in this table shall not be intentionally added to the steel without the agreement of the purchaser except for finishing the cast. All appropriate precautions are to be taken to avoid the addition of such elements from scrap and other materials used in production which would impair mechanical properties and the suitability of the steel.

◎ T-thickness；l-longitudinal；t-trasverse
◎ +A=soft annealed；+QT=quenched and tempered；+P=precipitation hardened；+AT=solutiong annealed；+SR=strength relieved