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    Q235B圓鋼

    Q235B圓鋼 
    Q235B圓鋼定義:
    是指截面為圓形的實心長條鋼材。其規格以直徑的毫米數表示,如“ 50”即表示直徑為 50毫米的圓鋼。
    Q235B圓鋼分為熱軋、鍛制和冷拉三種。熱軋圓鋼的規格為5.5-250毫米。其中:5.5-25毫米的小圓鋼大多以直條成捆供應,常用作鋼筋、螺栓及各種機械零件;大于25毫米的圓鋼,主要用于制造機械零件或作無縫鋼管坯 .
      
    Q235B圓鋼與其它鋼筋的區別:
    1 外型不一樣,圓鋼外型光圓,無紋無肋,其它鋼筋表面外型有刻紋或有肋.這樣就造成圓鋼與混凝土的粘結力小,而其它鋼筋與混凝土的粘結力大.
    2 成份不一樣,圓鋼(一級鋼)屬于普通低碳鋼,其它鋼筋多為合金鋼.
    3 強度不一樣.圓鋼強度低,其它鋼強度高,即直徑大小相同的圓鋼與其它鋼筋相比,圓鋼所能承受的拉力要比其它鋼筋小,但圓鋼的塑性比其它鋼筋強,即圓鋼在被拉斷前有較大的變形,而其它鋼筋在被拉斷前的變形要小得多.
     
    Q235B圓鋼理論重量表:
    產品名稱            圓鋼直徑d(型號)理論重量 kg/m        圓鋼直徑d(型號) 理論重量kg/m
    Q235B圓鋼                6                 0.222                45                12.5
    Q235B圓鋼                7                 0.302                50                15.4
    Q235B圓鋼                8                 0.395                53                17.3
    Q235B圓鋼                9                 0.499                55                18.6
    Q235B圓鋼                10                0.617                56                19.3
    Q235B圓鋼                11                0.746                58                20.7
    Q235B圓鋼                12                0.888                63                24.5
    Q235B圓鋼                13                1.04                 65                26
    Q235B圓鋼                14                1.21                 68                28.5
    Q235B圓鋼                15                1.39                 70                30.2
    Q235B圓鋼                16                1.58                 75                34.7
    Q235B圓鋼                17                1.78                 80                39.5
    Q235B圓鋼                18                2                    85                44.5
    Q235B圓鋼                19                2.23                 90                49.9
    Q235B圓鋼                20                2.47                 95                55.6
    Q235B圓鋼                21                2.72                 100               61.7
    Q235B圓鋼                22                2.98                 105               68
    Q235B圓鋼                23                3.26                 110               74.6
    Q235B圓鋼                24                3.55                 115               81.5
    Q235B圓鋼                25                3.85                 120               88.8
    Q235B圓鋼                26                4.17                 125               96.3
    Q235B圓鋼                27                4.49                 130               104
    Q235B圓鋼                28                4.83                 140               121
    Q235B圓鋼                29                5.18                 150               139
    Q235B圓鋼                30                5.55                 160               158
    Q235B圓鋼                31                5.92                 170               178
    Q235B圓鋼                32                6.31                 180               200
    Q235B圓鋼                33                6.71                 190               223
    Q235B圓鋼                34                7.13                 200               247
    Q235B圓鋼                35                7.55                 220               298
    Q235B圓鋼                36                7.99                 250               385
     

    Q235B圓鋼價格表;
    產品名稱                型號                     規格                    價格
    圓鋼                    Q235B                    Ф10                    5000
    圓鋼                    Q235B                    ф18                    5000
    圓鋼                    Q235B                    ф20                    5000
    圓鋼                    Q235B                    ф22                    5000
    圓鋼                    Q235B                    ф25                    5000
    圓鋼                    Q235B                    ф28                    5000
    圓鋼                    Q235B                    ф30                    5000
    圓鋼                    Q235B                    ф32                    5000
    圓鋼                    Q235B                    ф35                    5000
    圓鋼                    Q235B                    ф38                    5000
    圓鋼                    Q235B                    ф40                    5000
    圓鋼                    Q235B                    ф42                    5000
    圓鋼                    Q235B                    ф45                    5000
    圓鋼                    Q235B                    ф48                    5000
    圓鋼                    Q235B                    ф50                    5000
    圓鋼                    Q235B                    ф55                    5000
    圓鋼                    Q235B                    ф60                    5000
    圓鋼                    Q235B                    ф65                    5000
    圓鋼                    Q235B                    ф70                    5000
    圓鋼                    Q235B                    ф75                    5000
    圓鋼                    Q235B                    ф80                    5000
    圓鋼                    Q235B                    ф85                    5000
    圓鋼                    Q235B                    ф90                    5000
    圓鋼                    Q235B                    ф95                    5000
    圓鋼                    Q235B                    ф100                   5000
    圓鋼                    Q235B                    ф105                   5000
    圓鋼                    Q235B                    ф110                   5000
    圓鋼                    Q235B                    ф115                   5000
    圓鋼                    Q235B                    ф120                   5000
    圓鋼                    Q235B                    ф130                   5000
    圓鋼                    Q235B                    ф140                   5000
    圓鋼                    Q235B                    ф150                   5000
    圓鋼                    Q235B                    ф160                   5000
    圓鋼                    Q235B                    ф170                   5000
    圓鋼                    Q235B                    ф180                   5000
    圓鋼                    Q235B                    ф190                   5000
    圓鋼                    Q235B                    ф200                   5000

     

    Q235B圓鋼化學成分;
    碳 C ;0.17~0.22%
    硅 Si;≤0.35%
    錳 Mn;≤1.40%
    硫 S ;≤0.045% 
    磷 P ;≤0.045%
    鉻 Cr;允許殘余含量≤0.030%
    鎳 Ni;允許殘余含量≤0.030%
    銅 Cu;允許殘余含量≤0.030 %
    注;脫氧方法:F、b、Z
     
    Q235B圓鋼特點和優勢;
    Q235B圓鋼含碳量增加,鋼的強度、硬度升高,塑性、韌性和可焊性降低.與其他鋼類相比,碳素鋼使用最早,成本低,性能范圍寬,用量最大.適用于公稱壓力PN≤32.0MPa,溫度為-30-425℃的水、蒸汽、空氣、氫、氨、氮及石油制品等介質.
    碳素工具鋼價廉易得,易于鍛造成形,切削加工性也比較好.碳素工具鋼的主要缺點是淬透性差,需要用水、鹽水或堿水淬火,畸變和開裂傾向性大,耐磨性和熱強度都很低.因此,碳素工具鋼只能用來制造一些小型手工刀具或木工刀具,以及精度要求不高、形狀簡單、尺寸小、負荷輕的小型冷作模具,如用來制造小沖頭、剪刀、冷沖模、冷鐓模等.特別需要指出的是,碳素工具鋼適于做冷鐓模,根據冷鐓模的工作條件,模具材料除了應有足夠的強度以及模具工作表面和型腔要有足夠的硬度和硬化層外,還需要有足夠的韌度,故這類模具熱處理后要求內孔有一定的淬硬層而外部不能淬硬,從而可保持有較高的韌度.
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