Cor-Ten steel. Developing a natural rust patina over time, Cor-Ten steel is a great choice for a more modern, rustic look. Steel can be purchased in sheets and used as either an opaque privacy fence or a stand-alone backdrop wall.Corten has been used for walls, edgings, dividers, planters, gate trims, and arbors; indeed, its versatility seems to be limited only by the designer's imagination.This is a line of outdoor and indoor pots with an elegant, and at the same time simple shape.Our modern Corten Steel Square Vegetable Planters are perfect for creating a raised vegetable bed or for planting with a tree or larger shrub to allow maximum root growth while giving a stylish surround.