The Harvey Steel Company records have been organized into four subseries: Administrative documents, Screw machine patents and agreements, Harvey Steel Plate patents and agreements, and Scrapbooks and photographs.

The Administrative documents subseries includes prospectuses of the Harvey Steel Company of Great Britain, Ltd. and the Simewog Mining and Iron Company, director's reports, three trade cards, and statements and liquidation papers of the Harvey United Steel Company, Ltd.

The Screw machine patents and agreements subseries primarily consist of Hayward A. Harvey's patents, his notebooks, and a small set of materials related to Thomas W. Harvey's patent agreement with Charles Ely. There is also a thirteen-page history of the American Screw Company, which rose to prominence by copying some of Harvey's devices.

The Harvey Steel Plate patents and agreements subseries includes correspondence and booklets describing tests of "Harveyized" armor plate in both England and America, lists of ships built with "Harveyized" armor, and correspondence of his attorney, Edwin M. Quimby, on his behalf related to patents on armor plates and washing machines.

The scrapbooks and photographs subseries consists of two sets of scrapbooks containing newspaper clippings. One set primarily focuses on Harvey Armour and tests of the armor; the other set focuses on the company more generally, as well as the Harvey Screw Machine and Harvey Armour. The photographs are of the New Jersey plant.