工程结构用钢是我国生产量大,使用面广的重要钢类,占钢总产量的80%左右,广泛适用于各种工程和结构件。常用的工程结构钢材有工程用碳素结钢和低合金高强度结构钢。主要产品是板带和型材,也有管材。目前,我国已制定工程结构用钢标准66个,其中通用标准5个,标准体系基本建立。从国 Steel for structural engineering is an important type of steel with a large production volume and a wide range of applications in our country, accounting for about 80% of the total steel output. It is widely used in various engineering and structural parts. Common engineering steel structure engineering carbon steel and low alloy high strength structural steel. The main products are strip and profile, but also pipe. At present, China has formulated 66 steel standards for engineering structures, of which 5 are common standards and the standard system has basically been established. From the country