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为推动建筑材料科技进步 ,适应建筑业对新材料的需求 ,扭转落后被动局面 ,国家冶金局开发研制了微合金40 0 MPa热轧钢筋。不同地区的工程实践表明 ,40 0 MPa热轧钢筋的强度高且性能稳定 ,今后将成为现浇混凝土结构的主导钢筋。目前 40 0 MPa热轧钢筋的生产技术已经成熟 ,生产规
In order to promote scientific and technological progress in building materials and adapt to the construction industry’s demand for new materials, to reverse the backward and passive situation, the National Metallurgical Bureau has developed a micro-alloy 400 MPa hot rolled steel bar. The engineering practice in different regions shows that the 40 0 MPa hot-rolled steel bar has high strength and stable performance, and will become the dominant reinforcing bar for cast-in-place concrete structures in the future. At present, the production technology of 40 0 MPa hot-rolled steel bar has matured, production rules