ABSTRACT
Figure 24 Different lead valve patterns [61]. (Courtesy of Lead Industries Association, New York.)
Figure 25 The different forms of hard lead and lead-lined fittings [61]. (Courtesy of Lead Industries Association, New York.)
Figure 26 Seventeen-ton evaporator vessel made of cast lead 8% antimony alloy for concentrating titanium sulphate solution [61]. (Courtesy of Lead Industries Association, New York.)
widely used processes for lead alloy shapes. The use of forming processes using industrial machinery began in the late 18th century with the award of the first patent for a lead press granted in 1797 to Bramah in London [2]. A brief background on different forming processes and the commonly produced lead alloy shapes are discussed in this section.
