Don 't cut no machined elongated cast products as vasados began to lead compounds.

摘要

1492952 Leaded steel casting INLAND STEEL CO and ECHEVARRIA SA 2 Oct 1974 [3 Oct 1973] 42705/74 Heading C7A An elongated, uncropped as cast unworked casting composed of leaded steel comprising:- C 0À03 to 1À03% Mn 0À25 to 1À65% S 0 to 0À5% P 0 to 0À2% Si 0 to 0À75% N 2 0 to 0À03% Te 0 to 0À15% Cr 0 to 1À6% Ni 0 to 3À75% Mo 0 to 0À5% V 0 to 0À25% B 0 to 0À003% Ti 0 to 0-5% Zr 0 to 0À25% Nb 0 to 0À25% Al 0 to 0À1% Ca 0 to 0À02% Fe plus impurities Balance and having a weight greater than 1,000 lbs, a commercially acceptable surface and a lead content greater than 0À35% and up to 0À7% and comprising lead inclusions consisting essentially of microscopic inclusions comprising elemental lead distributed throughout the length of the casting being essentially devoid of macroscopic lead inclusions throughout its length including the bottom portion thereof, being devoid of rare earths and substantially devoid of lead oxide inclusions. The steel casting may be prepared by tapping a steel melt at 2900‹-3100‹F into a ladle, employing argon to stir the melt and to form a non-oxidizing atmosphere in the ladle, adding lead to a slag free portion of the melt surface and teeming at 2850 F into ingot moulds or a continuous casting plant