“…11 wt % , a nd also the surface coverage of graphi te in creases {i'om 86 to 90 % in these sp ecimens. In the case of high carbon steel or of cast iron , it is well known tha t the graphitization IS prom o ted by the addi tion of Ni or CO. 4,8) 6. The Group IB, (Cu, Ag)…”