Ferro Tungsten Grade Not more than W C P S Mn As Cu Pb Sn Fe-W A 75 ~ 85 0.3 0.05 0.08 0.5 0.08 0.10 - 0.06 Fe-W B 75 ~ 85 0.5 0.05 0.08 0.5 0.10 0.15 0.05 0.08 Size 10 ~ 50mm 90% over, 100mm under 100%
