 Antimony forms a highly useful alloy with lead , increasing its hardness and mechanical strength . For most applications involving lead , varying amounts of antimony are used as alloying metal . In lead – acid batteries , this addition improves the charging characteristics and reduces generation of unwanted hydrogen during charging . It is used in antifriction alloys ( such as Babbitt metal ) , in bullets and lead shot , cable sheathing , type metal ( for example , for linotype printing machines ) , solder ( some " lead @-@ free " solders contain 5 % Sb ) , in pewter , and in hardening alloys with low tin content in the manufacturing of organ pipes . 
 Antimony <a href='uninflect' title='1'><mark>forms</mark></a> a highly useful alloy with lead , increasing its hardness and mechanical strength . For most applications involving lead , varying amounts of antimony are used as alloying metal . In lead – acid batteries , this addition <a href='uninflect' title='2'><mark>improves</mark></a> the charging characteristics and <a href='uninflect' title='3'><mark>reduces</mark></a> generation of unwanted hydrogen during charging . It is used in antifriction alloys ( such as Babbitt metal ) , in bullets and lead shot , cable sheathing , type metal ( for example , for linotype printing machines ) , solder ( some " lead @-@ free " solders contain 5 % Sb ) , in pewter , and in hardening alloys with low tin content in the manufacturing of organ pipes . 
Antimony form a highly useful alloy with lead , increasing its hardness and mechanical strength . fir most applications involving lead , varying amounts of antimony r used as alloying metal . In lead – acid batteries , this addition improve the chargin characteristics and reduce generation of unwanted hydrogen durin charging . It is used in antifriction alloys ( such as Babbitt metal ) , in bullets and lead shot , cable sheathing , type metal ( fa example , ffirlinotype printing machines ) , solder ( some " lead @-@ free " solders contain 5 % Sb ) , in pewter , and in hardening alloys w low tin content in da manufacturing of organ pipes .