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圆钢和螺纹钢的区别

放大字体  缩小字体 发布日期:2019-09-29 17:40:12    来源:钢源网    作者:钢源网    浏览次数:8551
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不同的形状。圆钢外表面光滑,螺纹钢外表面有螺旋肋。生产标准不同。现行标准中,圆钢为HPB235钢筋,其生产标准为《钢筋混凝土用

不同的形状。圆钢外表面光滑,螺纹钢外表面有螺旋肋。生产标准不同。现行标准中,圆钢为HPB235钢筋,其生产标准为《钢筋混凝土用热轧光钢筋》(GB13013);螺纹钢为HRB335和HRB400钢筋,其生产标准为《钢筋混凝土用热轧带肋钢筋》(GB1499)。 钢是不同的(化学成分不同)。圆钢(HPB235)为碳钢,钢号为Q235;螺纹钢为低合金钢,HRB335钢筋为20mnsi(20mnsi);HRB400钢筋为20mnsiv或20mnsinb或20mnti等。 物理力学性能不同。由于钢筋化学成分和强度的不同,钢筋的物理力学性能也不同。圆钢的冷弯性能较好,可用作180度弯钩,螺纹钢只能用作90度直钩;圆钢的焊接性较好,可用普通碳素焊条,螺纹钢应使用低合金焊条;螺纹钢的韧性和疲劳抗力钢比圆钢好。Different shapes. The outer surface of round steel is smooth; the outer surface of threaded steel has spiral ribs. Production standards are different. In the current standard, round steel refers to HPB235 steel bar, its production standard is "Hot Rolled Smooth Reinforcement Bar for Reinforced Concrete" (GB13013); Threaded steel refers to HRB335 and HRB400 steel bar, its production standard is "Hot Rolled Ribbed Reinforcement Bar for Reinforced Concrete" (GB1499).    Steel is different (chemical composition is different). Round steel (HPB235) is carbon steel, steel grade is Q235; thread steel is low alloy steel, HRB335 steel bar is 20MnSi (20MnSi); HRB400 steel bar is 20MnSiV or 20MnSiNb or 20MnTi, etc.    Physical and mechanical properties are different. Because of the difference of chemical composition and strength of reinforcing bars, the physical and mechanical properties of reinforcing bars are different. The cold bending performance of round steel is better, it can be used as 180 degree bending hook, and threaded steel can only be used as 90 degree straight hook; the weldability of round steel is better, using ordinary carbon welding rod can be used, threaded steel should use low alloy welding rod; the toughness and fatigue resistance of threaded steel is better than that of round steel.

 
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