一、圓鋼定義：  

圓鋼是指截面為圓形的實(shí)心長(zhǎng)條鋼材。其規(guī)格以直徑的毫米數(shù)表示，如“ 50”即表示直徑為 50毫米的圓鋼。

圓鋼分為熱軋、鍛制和冷拉三種。熱軋圓鋼的規(guī)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(yīng)，常用作鋼筋、螺栓及各種機(jī)械零件；大于25毫米的圓鋼，主要用于制造機(jī)械零件或作無(wú)縫鋼管坯。

二、理論重量計(jì)算公式：

圓鋼的計(jì)算公式w=0.006165*d*d

符號(hào)的意義 d=直徑mm

0.006165*14*14=1.20834（kg）

1.20384*3.8=4.591692（kg）

三、規(guī)格及重量表：

直     徑(mm)           截面面積 (cm2)         理論重量(kg/m)

5                                   0.1963                 0.154

5.6                               0.2463                 0.193

6                                   0.2827                 0.222

6.3                               0.3117                 0.245

7                                   0.3848                 0.302

8                                   0.5027                 0.395

9                                   0.6359                   0.499

10                                 0.7854                   0.617

11                               0.9503                   0.746

12                               1.131                     0.888

13                               1.327                       1.04

14                                 1.539                       1.21

15                                 1.767                       1.39

16                                 2.011                       1.58

17                               2.270                       1.78

18                               2.545                         2.00

19                             2.835                           2.23

20                               3.142                         2.47

21                               3.464                         2.72

22                               3.801                         2.98

24                               4.524                         3.55

25                             4.909                           3.85

26     &nbs