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Q235B圆钢

Q235B圆钢 
Q235B圆钢定义:
是指截面为圆形的实心长条钢材。其规格以直径的毫米数表示,如“ 50”即表示直径为 50毫米的圆钢。
Q235B圆钢分为热轧、锻制和冷拉三种。热轧圆钢的规格为5.5-250毫米。其中:5.5-25毫米的小圆钢大多以直条成捆供应,常用作钢筋、螺栓及各种机械零件;大于25毫米的圆钢,主要用于制造机械零件或作无缝钢管坯 .
  
Q235B圆钢与其它钢筋的区别:
1 外型不一样,圆钢外型光圆,无纹无肋,其它钢筋表面外型有刻纹或有肋.这样就造成圆钢与混凝土的粘结力小,而其它钢筋与混凝土的粘结力大.
2 成份不一样,圆钢(一级钢)属于普通低碳钢,其它钢筋多为合金钢.
3 强度不一样.圆钢强度低,其它钢强度高,即直径大小相同的圆钢与其它钢筋相比,圆钢所能承受的拉力要比其它钢筋小,但圆钢的塑性比其它钢筋强,即圆钢在被拉断前有较大的变形,而其它钢筋在被拉断前的变形要小得多.
 
Q235B圆钢理论重量表:
产品名称            圆钢直径d(型号)理论重量 kg/m        圆钢直径d(型号) 理论重量kg/m
Q235B圆钢                6                 0.222                45                12.5
Q235B圆钢                7                 0.302                50                15.4
Q235B圆钢                8                 0.395                53                17.3
Q235B圆钢                9                 0.499                55                18.6
Q235B圆钢                10                0.617                56                19.3
Q235B圆钢                11                0.746                58                20.7
Q235B圆钢                12                0.888                63                24.5
Q235B圆钢                13                1.04                 65                26
Q235B圆钢                14                1.21                 68                28.5
Q235B圆钢                15                1.39                 70                30.2
Q235B圆钢                16                1.58                 75                34.7
Q235B圆钢                17                1.78                 80                39.5
Q235B圆钢                18                2                    85                44.5
Q235B圆钢                19                2.23                 90                49.9
Q235B圆钢                20                2.47                 95                55.6
Q235B圆钢                21                2.72                 100               61.7
Q235B圆钢                22                2.98                 105               68
Q235B圆钢                23                3.26                 110               74.6
Q235B圆钢                24                3.55                 115               81.5
Q235B圆钢                25                3.85                 120               88.8
Q235B圆钢                26                4.17                 125               96.3
Q235B圆钢                27                4.49                 130               104
Q235B圆钢                28                4.83                 140               121
Q235B圆钢                29                5.18                 150               139
Q235B圆钢                30                5.55                 160               158
Q235B圆钢                31                5.92                 170               178
Q235B圆钢                32                6.31                 180               200
Q235B圆钢                33                6.71                 190               223
Q235B圆钢                34                7.13                 200               247
Q235B圆钢                35                7.55                 220               298
Q235B圆钢                36                7.99                 250               385
 

Q235B圆钢价格表;
产品名称                型号                     规格                    价格
圆钢                    Q235B                    Ф10                    5000
圆钢                    Q235B                    ф18                    5000
圆钢                    Q235B                    ф20                    5000
圆钢                    Q235B                    ф22                    5000
圆钢                    Q235B                    ф25                    5000
圆钢                    Q235B                    ф28                    5000
圆钢                    Q235B                    ф30                    5000
圆钢                    Q235B                    ф32                    5000
圆钢                    Q235B                    ф35                    5000
圆钢                    Q235B                    ф38                    5000
圆钢                    Q235B                    ф40                    5000
圆钢                    Q235B                    ф42                    5000
圆钢                    Q235B                    ф45                    5000
圆钢                    Q235B                    ф48                    5000
圆钢                    Q235B                    ф50                    5000
圆钢                    Q235B                    ф55                    5000
圆钢                    Q235B                    ф60                    5000
圆钢                    Q235B                    ф65                    5000
圆钢                    Q235B                    ф70                    5000
圆钢                    Q235B                    ф75                    5000
圆钢                    Q235B                    ф80                    5000
圆钢                    Q235B                    ф85                    5000
圆钢                    Q235B                    ф90                    5000
圆钢                    Q235B                    ф95                    5000
圆钢                    Q235B                    ф100                   5000
圆钢                    Q235B                    ф105                   5000
圆钢                    Q235B                    ф110                   5000
圆钢                    Q235B                    ф115                   5000
圆钢                    Q235B                    ф120                   5000
圆钢                    Q235B                    ф130                   5000
圆钢                    Q235B                    ф140                   5000
圆钢                    Q235B                    ф150                   5000
圆钢                    Q235B                    ф160                   5000
圆钢                    Q235B                    ф170                   5000
圆钢                    Q235B                    ф180                   5000
圆钢                    Q235B                    ф190                   5000
圆钢                    Q235B                    ф200                   5000

 

Q235B圆钢化学成分;
碳 C ;0.17~0.22%
硅 Si;≤0.35%
锰 Mn;≤1.40%
硫 S ;≤0.045% 
磷 P ;≤0.045%
铬 Cr;允许残余含量≤0.030%
镍 Ni;允许残余含量≤0.030%
铜 Cu;允许残余含量≤0.030 %
注;脱氧方法:F、b、Z
 
Q235B圆钢特点和优势;
Q235B圆钢含碳量增加,钢的强度、硬度升高,塑性、韧性和可焊性降低.与其他钢类相比,碳素钢使用最早,成本低,性能范围宽,用量最大.适用于公称压力PN≤32.0MPa,温度为-30-425℃的水、蒸汽、空气、氢、氨、氮及石油制品等介质.
碳素工具钢价廉易得,易于锻造成形,切削加工性也比较好.碳素工具钢的主要缺点是淬透性差,需要用水、盐水或碱水淬火,畸变和开裂倾向性大,耐磨性和热强度都很低.因此,碳素工具钢只能用来制造一些小型手工刀具或木工刀具,以及精度要求不高、形状简单、尺寸小、负荷轻的小型冷作模具,如用来制造小冲头、剪刀、冷冲模、冷镦模等.特别需要指出的是,碳素工具钢适于做冷镦模,根据冷镦模的工作条件,模具材料除了应有足够的强度以及模具工作表面和型腔要有足够的硬度和硬化层外,还需要有足够的韧度,故这类模具热处理后要求内孔有一定的淬硬层而外部不能淬硬,从而可保持有较高的韧度.
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