Before revision: Production Steel remains the most commonly used slotted angle material, although aluminium alternatives are also available.What is Slotted Angle Shelving - URL (accessed: 9 April 2021)Aluminum Angle Iron Making Process - URL (accessed: 22 july 2017)}} The product is generally manufactured from sheet metal using machine presses to form the angle and to punch holes through the metal.
After revision: Production Steel remains the most commonly used slotted angle material, although aluminium alternatives are also available.What is Slotted Angle Shelving - URL (accessed: 9 April 2021)Aluminum Angle Iron Making Process - URL (accessed: 22 July 2017)}} The product is generally manufactured from sheet metal using machine presses to form the angle and to punch holes through the metal.