GB/T 5237.1-2017 standard specifies the base material terms and definitions, requirements, test methods, inspection rules, signs, Encasement, transportation, storage, mass certificate and order contents of aluminum alloy building profiles. This standard applies to aluminum alloy hot extrusion profiles (ie substrates) without surface preparation for doors, windows, curtain walls, guardrails and other buildings, and also applies to hot extrusion pipes for the same purpose. The standard refers to a number of relevant documents, including GB/T 3190 on the chemical composition of aluminum and aluminum alloys, GB/T 4340.1 on the Vickers Hardness test of metal materials, etc., to ensure conformity and standardization in the production and quality control process. The implementation of this standard helps the aluminum alloy building profile industry to improve product mass, ensure that it meets domestic and foreign technical requirements and trade standards, and promote the progress and development of industry technology.