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1985年11月26日～27日在石家庄市召开了《25MnSiV高强螺纹钢筋技术鉴定会》。有关专家,教授、工程技术人员,对承德钢铁厂和石家庄钢铁厂共同研制的25MnSiV高强度螺纹钢筋进行了技术鉴定。这两家钢铁厂根据国内外建筑业对高层建筑用钢的需求,研制了这种高效钢材。从1980年开始,他们按英国BS4449—1978《钢筋混凝土用热轧变形钢筋》标准的要求,经过不断摸索,充
November 25, 1985 -27 days in Shijiazhuang City held a “25MnSiV high-strength threaded steel technical appraisal meeting.” Relevant experts, professors, engineers and technicians carried out technical appraisal on 25MnSiV high-strength rebar jointly developed by Chengde Steel Plant and Shijiazhuang Steel Plant. The two steel mills have developed such high-efficiency steel according to the demand of the construction industry for high-rise buildings at home and abroad. Since 1980, according to the British BS4449-1978 “hot-rolled steel reinforced concrete with deformed bar” standard requirements, after continuous exploration, filling