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65 Mn SiV 是首都钢铁公司试制的高强度预应力钢筋用钢,其强度级别是70/110公斤/毫米~2。原准备将此钢筋用于沈阳某新建工程6米鱼腹式预应力混凝土吊车梁及24米预应力混凝土屋架。1971年4月在首都钢铁公司轧制成φ12螺纹钢筋。选其中两炉(2191及2136)分别切成25米及7.5米定尺,于6月份运至沈建二公司加工厂。
65 Mn SiV is a high-strength prestressed steel used for trial production by the Capital Steel Corporation. Its strength level is 70/110 kg/mm~2. The original plan was to use this reinforcement for a 6m fish-bellied prestressed concrete crane girder and a 24m prestressed concrete truss in a new construction project in Shenyang. In April 1971, it was rolled into φ12-threaded steel bars at the Capital Steel Company. Two of the furnaces (2191 and 2136) were cut into 25-meter and 7.5-meter-length cuts, respectively, and shipped to the Shenjian Second Company processing plant in June.