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