Our Industrial Brands include Castle Metals Industrial, Banner Commercial, Banner P&M Supply, and NKS, as well as Oliver Plate Steel and HA Industries.
A.M. Castle & Co. is a trusted supplier of premium materials tailored to meet the demands of the industrial gear market. With a focus on both thru-hardened and carburized gear grades, Castle provides the steel necessary for high-performance gear applications like worm, bevel, helical, and spur gears.
Thru-Hardened Gear Grades
Thru-hardened steels, such as 1045, 4140, 4150, and 4340, are quenched and tempered to deliver consistent hardness and moderate wear resistance. These grades excel in applications requiring toughness, and they can also be surface-hardened through induction processes for even more robust performance. Typical applications include construction equipment and fuel pumps.
Carburized Gear Grades
Low-carbon steels like 1018, 8620, 4820, and 9310 are carburized to achieve a tough, softer core with a hardened surface case. This creates superior wear resistance, ideal for gears in automotive differentials and heavy-duty transmissions.
Stainless Steel Options
For enhanced corrosion resistance and machinability, Castle offers grades like 303, 304, and 316. These steels are perfect for spur, helical, and bevel gears in industries like printing, marine systems, and food processing.
Castle’s materials power a variety of gear types:
A.M. Castle is more than a supplier—we are a partner in precision engineering, ensuring your gears perform reliably in the toughest environments.
