| Show Hardest Known Metal Is American Product A new metal so foO 0 hard that It wilt will bore smooth holes boles In concrete or cut screw threads In la a n glass rod roll was ex hi bit cd for tor the first time nt at the recent convention of ot the American SocIety for tor Steel Treating at la laIth Ith present diy tools such feats teats lire nr difficult or even Impossible The new material known as ns loy and cr cm cn n of ot tungsten carbide i 1 corn com po Ind of ot tungsten and carbon and I co cobalt bolt ball balt a metal like lI nickel Is the Inden Insen Indention tion of ot Dr Samuel 1 L licit t of ot the re- re re research search laboratory of ot the General Elec Elec- Electric Electric company It Is Ls s so hard that It will cut glass class like a n diamond and will even scratch a sapphire which Is next below the diamond In the scale of hardness Ordinary steel tools are nr quickly worn down when held against an emery wheel but the new metal itself wears down the wheel |
