fosforit (0,1-0,3 %) sisaldav tinapronks (5-20 % Sn); kasutatakse laagripronksina (vt pronks, laagripronks; vrd pliipronks), a tin bronze containing 5-20 % Sn and a small amount of phosphorus (0.1-0.3 %) (see: bronze, bearing bronze; compare: lead bronze)