Al Bronze Round 60 Mm Dia To Matl. Specn. Brazh9Lrgost 18175-78/Grade Ab1 Is: 305-1981 , Bronze 145Mm Dia. Proof Machined (Manganese Bronzecasting) To Spec. Is: 304-1981, Grade Ht B 1 Or B ,Phosphor Bronze Round Bar Dia. 50 Mm To Is: 7811-1985. Acceptance Criteriar Based Test Piece Trialfor , Al. Bronze 60 Mm Square Bar To Drg. No.Mpf/Lf/8711752060 Quantity: 192