The ISO 20805 standard specifies the technical requirements for thick hot-rolled steel sheets with higher yield strength, improved formability and suitable for cold forming. The standard is suitable for the manufacture of hot-rolled steel sheets that require higher yield strength and good formability, especially those used in cold forming processes. This type of steel sheet is commonly used in the production of automotive, construction and Miscellaneous heavy industrial components. Through the improved process, the steel sheet is not only able to withstand high mechanical loads, but also has better processing performance, allowing for better shape and dimensional Stability during subsequent processing. This standard provides uniform mass requirements for the steel industry, ensuring the Reliability and performance of products, and meeting the high requirements of modern industry for the performance of steel materials.