For photovoltaic (PV) bracket systems, steel accounts for 60-70% of total material costs according to the 2024 SolarTech Industry PDF version includes complete article with source references. Suitable for printing and offline reading. Designed for durability and precision, these brackets are engineered to withstand various environmental conditions, from extreme weather to long-term wear. This guide explores aluminum, steel, and composite options, backed by industry data and real-world examples, to help installers and project developers make informed. A36 steel shall be used for H-shaped steel piles, diagonal braces, purlin brackets and joint parts. Their mechanical properties and chemical composition shall meet the requirements of ASTM A36/A36M-08 “Standard Specification for Carbon Structural Steel. Material strength: The strength of steel. Aluminum-Magnesium-Zinc coated steel is a new type of highly corrosion-resistant coated steel sheet with a coating composition consisting of zinc as the main substrate in combination with aluminum (about 11%), magnesium (about 3%) and a trace amount of silicon. Adding Al, Mg, and Si to it, the.