Angle iron, commonly known as angle iron, is a long strip of steel with two sides perpendicular to each other.
Angle steel can be used to form various stress-bearing members according to different needs of the structure, and can also be used as a connecting piece between members. It is widely used in various building structures and engineering structures, such as house beams, bridges, transmission towers, lifting and transportation machinery, ships, industrial furnaces, reaction towers, container racks, cable trench supports, power piping, bus support installation, and warehouse shelves.
Angle steel belongs to carbon structural steel for construction. It is a simple section steel, mainly used for metal components and plant frames. Good weldability, plastic deformation property and certain mechanical strength are required in use. The raw material billet for angle steel production is low-carbon square billet, and the finished angle steel is delivered in hot rolling forming, normalizing or hot rolling state.
Type and specification
The specification of angle steel is expressed by side length and side thickness. At present, the specification of domestic angle steel is 2-20, and the number of cm of side length is taken as the number. The same angle steel often has 2-7 different side thicknesses. The actual size and thickness of both sides of the imported angle steel shall be indicated and relevant standards shall be indicated. Generally, large angle steel with side length of more than 12.5cm, medium angle steel with side length of 12.5cm-5cm, and small angle steel with side length of less than 5cm.
Vector diagram of equilateral angle steel
The order of import and export angle steel is generally based on the specifications required in use, and its steel grade is the corresponding carbon steel grade. Besides the specification number, the angle steel has no specific composition and performance series. The delivery length of angle steel is divided into fixed length and double length. The selection range of fixed length of domestic angle steel is 3-9m, 4-12m, 4-19m and 6-19m according to the specification number. The length selection range of angle steel made in Japan is 6-15m.
The section height of unequal angle steel is calculated according to the length and width of unequal angle steel. Refers to the steel with angular section and unequal length on both sides. It is one of the angle steels. Its side length is 25mm × 16mm～200mm × l25mm。 It is rolled by a hot rolling mill.
The general specification of unequal angle steel is ∟ 50 * 32 - ∟ 200 * 125, and the thickness is 4-18mm.
Theoretical weight table of equilateral angle steel
|
Specification (side length * thickness)mm
|
weight(kg/m)
|
Specification (side length * thickness)mm
|
weight(kg/m)
|
|
20*3
|
0.89
|
80*5
|
6.21
|
|
20*4
|
1.15
|
80*6
|
7.38
|
|
25*3
|
1.12
|
80*7
|
8.53
|
|
25*4
|
1.46
|
80*8
|
9.66
|
|
30*3
|
1.37
|
80*10
|
11.87
|
|
30*4
|
1.79
|
90*6
|
8.35
|
|
36*3
|
1.66
|
90*7
|
9.66
|
|
36*4
|
2.16
|
90*8
|
10.95
|
|
36*5
|
2.65
|
90*10
|
13.48
|
|
40*3
|
1.85
|
90*12
|
15.94
|
|
40*4
|
2.42
|
100*6
|
9.37
|
|
40*5
|
2.98
|
100*7
|
10.83
|
|
45*3
|
2.09
|
100*8
|
12.28
|
|
45*4
|
2.74
|
100*10
|
15.12
|
|
45*5
|
3.37
|
100*12
|
17.9
|
|
45*6
|
3.99
|
100*14
|
20.61
|
|
50*3
|
2.33
|
100*16
|
23.26
|
|
50*4
|
3.06
|
110*7
|
11.93
|
|
50*5
|
3.77
|
110*8
|
13.53
|
|
50*6
|
4.46
|
110*10
|
16.69
|
|
56*3
|
2.62
|
110*12
|
19.78
|
|
56*4
|
3.45
|
110*14
|
22.81
|
|
56*5
|
4.25
|
125*8
|
15.5
|
|
56*8
|
6.57
|
125*10
|
19.13
|
|
63*4
|
3.91
|
125*12
|
22.7
|
|
63*5
|
4.82
|
125*14
|
26.19
|
|
63*6
|
5.72
|
140*10
|
21.49
|
|
63*8
|
7.47
|
140*12
|
25.52
|
|
63*10
|
9.15
|
140*14
|
29.49
|
|
70*4
|
4.37
|
140*16
|
33.39
|
|
70*5
|
5.4
|
160*10
|
24.73
|
|
70*6
|
6.41
|
160*12
|
29.39
|
|
70*7
|
7.4
|
160*14
|
33.99
|
|
70*8
|
8.37
|
160*16
|
38.52
|
|
75*5
|
5.82
|
180*12
|
33.16
|
|
75*6
|
6.91
|
180*14
|
38.38
|
|
75*7
|
7.98
|
180*16
|
43.54
|
|
75*8
|
9.03
|
180*18
|
48.63
|
|
75*10
|
11.09
|
200*14
|
42.89
|
|
200*16
|
48.68
|
||
|
200*18
|
54.4
|
||
|
200*20
|
60.06
|
||
|
200*24
|
71.17
|
Theoretical weight table of unequal angle steel
|
Specification (length * width * thickness)mm
|
weight(kg/m)
|
Specification (length * width * thickness)mm
|
weight(kg/m)
|
|
25*16*3
|
0.91
|
100*63*6
|
7.55
|
|
25*16*4
|
1.18
|
100*63*7
|
8.72
|
|
32*20*3
|
1.17
|
100*63*8
|
9.88
|
|
32*20*4
|
1.52
|
100*63*10
|
12.1
|
|
40*25*3
|
1.48
|
100*80*6
|
8.35
|
|
40*25*4
|
1.94
|
100*80*7
|
9.66
|
|
45*28*4
|
1.69
|
100*80*8
|
10.9
|
|
45*28*5
|
2.2
|
100*80*10
|
13.5
|
|
50*32*3
|
1.91
|
110*70*6
|
8.35
|
|
50*32*4
|
2.49
|
110*70*7
|
9.66
|
|
56*36*3
|
2.15
|
110*70*8
|
10.9
|
|
56*36*4
|
2.82
|
110*70*10
|
13.5
|
|
56*36*5
|
3.47
|
125*80*7
|
11.1
|
|
63*40*4
|
3.19
|
125*80*8
|
12.6
|
|
63*40*5
|
3.92
|
125*80*10
|
15.5
|
|
63*40*6
|
4.64
|
125*80*12
|
18.3
|
|
63*40*7
|
10
|
140*90*8
|
14.2
|
|
70*45*4
|
3.57
|
140*90*10
|
17.5
|
|
70*45*5
|
4.4
|
140*90*12
|
20.7
|
|
70*45*6
|
5.22
|
140*90*14
|
23.9
|
|
70*45*7
|
6.01
|
160*100*10
|
19.9
|
|
75*50*5
|
4.81
|
160*100*12
|
23.6
|
|
75*50*6
|
5.7
|
160*100*14
|
27.2
|
|
75*50*8
|
7.43
|
160*100*16
|
30.8
|
|
75*50*10
|
9.1
|
180*110*10
|
22.3
|
|
80*50*5
|
5
|
180*110*12
|
26.5
|
|
80*50*6
|
5.93
|
180*110*14
|
30.6
|
|
80*50*7
|
6.85
|
180*110*16
|
34.6
|
|
80*50*8
|
7.75
|
200*125*12
|
29.8
|
|
90*56*5
|
5.66
|
200*125*14
|
34.4
|
|
90*56*6
|
6.72
|
200*125*16
|
39
|
|
90*56*7
|
7.76
|
200*125*18
|
43.6
|
|
90*56*8
|
8.78
|
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