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Introduction of fine rolled screw bars25精轧螺纹钢 精轧32垫板
预应力混凝土用螺纹钢筋，也称精轧螺纹钢筋，是在一根钢筋上轧有外螺纹的大直径、强度、高尺寸精度的直条钢筋。该钢筋在任意截面处都能拧上带有内螺纹的连接器（精轧螺纹钢连接器）进行连接或拧上带螺纹的螺帽（精轧螺纹钢螺母）进行锚固。
Most of the fine rolled steel bars are used for continuous beams and large frame structures in large water conservancy projects, industrial and civil buildings, transportation and railway large and medium-sized Bridges, nuclear power stations and anchors.It has the advantages of connecting, anchoring, strong adhesion, safety and reliability of tensioning, convenient construction and other advantages, and saving reinforcement, reducing the area and weight of the components.
精轧螺纹钢筋大部分应用在大型水利工程、工业和民用建筑中的连续梁和大型框架结构，交通、铁路大中跨桥梁、核电站及地锚等工程。它具有连接、锚固简便，粘着力强，张拉锚固安全可靠，施工方便等优点，而且节约钢筋，减少构件面积和重量。
Prestressed concrete steel bars, also known as fine rolled steel bars, are straight bars of large diameter, ultra-high strength and high dimensional accuracy that are rolled over a steel bar.
The rebar can be used to unscrew the connector of the internal thread (the fine rolling screw steel connector) and screw the threaded nut (the fine rolled nut) with the screw in any section of the section.精轧锚固板35crmo高强度螺母
精轧螺纹钢筋以屈服强度划分级别，其代号为“PSB”加上规定屈服江苏徐州强度小值表示。常用级别为： PSB500、PSB785、PSB830、PSB930、PSB1080
The fine rolled steel bars are rated at the yield strength level, whose code is "PSB" and the minimum yield strength is indicated.
Commonly used level: PSB500, PSB785, PSB830, PSB930, PSB1080

精轧螺纹钢筋的公称直径范围为18mm~50mm，一般推荐的公称直径为25mm、32mm。
The nominal diameter of the fine rolled steel bars is 18mm~ 50mm, and the nominal diameter is 25mm and 32mm.