方管重量計算公式：4*壁厚*（邊長-壁厚）*7.85
矩形管重量計算公式：（邊長+邊長）*2//3.14-壁厚*壁厚*0.02466
邊長
(mm) |
截面面積(cm2)
|
理論重量(kg/m)
|
邊長
(mm) |
截面面積(cm2)
|
理論重量(kg/m)
|
||
5
|
0.25
|
0.196
|
30
|
9.00
|
7.06
|
||
6
|
0.36
|
0.283
|
32
|
10.24
|
8.04
|
||
7
|
0.49
|
0.385
|
34
|
11.56
|
9.07
|
||
8
|
0.64
|
0.502
|
36
|
12.96
|
10.17
|
||
9
|
0.81
|
0.636
|
38
|
14.44
|
11.24
|
||
10
|
1.00
|
0.785
|
40
|
16.00
|
12.56
|
||
11
|
1.21
|
0.95
|
42
|
17.64
|
13.85
|
||
12
|
1.44
|
1.13
|
45
|
20.25
|
15.90
|
||
13
|
1.69
|
1.33
|
48
|
23.04
|
18.09
|
||
14
|
1.96
|
1.54
|
50
|
25.00
|
19.63
|
||
15
|
2.25
|
1.77
|
53
|
28.09
|
22.05
|
||
16
|
2.56
|
2.01
|
56
|
31.36
|
24.61
|
||
17
|
2.89
|
2.27
|
60
|
36.00
|
28.26
|
||
18
|
3.24
|
2.54
|
63
|
39.69
|
31.16
|
||
19
|
3.61
|
2.82
|
65
|
42.25
|
33.17
|
||
20
|
4.00
|
3.14
|
70
|
49.00
|
38.49
|
||
21
|
4.41
|
3.46
|
75
|
56.25
|
44.16
|
||
22
|
4.84
|
3.80
|
80
|
64.00
|
50.24
|
||
24
|
5.76
|
4.52
|
85
|
72.25
|
56.72
|
||
25
|
6.25
|
4.91
|
90
|
81.00
|
63.59
|
||
26
|
6.76
|
5.30
|
95
|
90.25
|
70.85
|
||
28
|
7.84
|
6.15
|
100
|
100.00
|
78.50
|