The total content of {TAIL ~ these additional alloying elements} should not exceed {HEAD ~ 1.0 percent} by weight, preferably not over 0.5 percent by weight 
The total content of { TAIL ~ these additional alloying elements } should not exceed { HEAD ~ 1.0 percent } by weight , preferably not over 0.5 percent by weight
OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH