"C20"

"C20" typically refers to a category of steel known as "C20" or "S235JR," commonly used in construction and engineering. It indicates a specific grade with particular properties, such as its strength and composition. C20 steel has a moderate tensile strength, making it suitable for structural applications like framework, beams, and supports. The designation helps engineers ensure they select materials with consistent quality and performance for their projects. Overall, C20 signifies a standardized material that balances strength and workability for construction purposes.