Records of the American Iron & Steel Association consist of minutes of meetings, secretary's reports and letters, membership and subscription records, and treasurer's account books. These records clearly delineate the scope of the Association's membership and the limited nature of its income and activities. The first volume of membership assessments and subscriptions contains tables on iron and steel production since 1743. There are also sets of the Association's printed Annual Report (1878-1899) and Bulletin (1867-1868, 1901-1912).

Minutes and circulars of the Industrial League (1874-1890) give details on its membership and their financial contributions to the protectionist cause and on the League's gradual absorption into the American Iron & Steel Association.