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Carbon Steel Square Bar

Carbon steel square bar with a side length of 5.5mm~300mm.Carbon square steel bar, solid, belongs to bar material, generally processed by hot rolling.Hot rolled steel square bars are generally used in light-weight steel structures, such as steel roof trus

Product introduction

Size, weight and tolerance:

Dimensions and tolerances:

Carbon Steel Square Bar
Section Nominal Size
(Square steel side length)
Allowable deviation
Group 1
Group 2
Group 3
>5.5~20
±0.25
±0.35±0.40
>20~30
±0.30±0.40±0.50
>30~50±0.40±0.50±0.60
>50~80±0.60±0.70±0.80
>80~110±0.90±1.00±1.10
>110~150±1.20±1.30±1.40
>150~200±1.60±1.80±2.00
>200~280±2.00±2.50±3.00
>280~310±2.50±3.00±4.00
>310~380±3.00±4.00±5.00
Note: The unit is mm.


Length and tolerance:

Hot Rolled Steel Square Barusual length
short length
Section Nominal SizeSquare bar length
≤75
2000~12000
≥1000
>75
1000~8000
≥500
Note: The unit is mm.


Diagonal length:

Carbon Steel Square BarNominal side length of square bar (a)

Diagonal length


<50mm
1.33 times the nominal side length
≥50mm

1.29 times the nominal side length


Curvature:

Hot Rolled Steel Square BarGroup

Curvature per meter

Total curvature

(Carbon Steel Bar Length)

Group 1
≤2.5mm
≤0.25%
Group 2
≤4.0mm
≤0.40%


Dimensions and theoretical weight:

Carbon Steel Square BarNominal side length of square bar a/mmTheoretical weight/(kg/m)Nominal side length of square bar a/mmTheoretical weight/(kg/m)
5.5
0.237
56
24.6
6
0.283
58
26.4
6.5
0.332
60
28.3
7
0.385
63
31.2
8
0.502
65
33.2
9
0.636
68
36.3
10
0.785
70
38.5
11
0.950
75
44.2
12
1.13
80
50.2
13
1.33
85
56.7
14
1.54
90
63.6
15
1.77
95
70.8
16
2.01
100
78.5
17
2.27
105
86.5
18
2.54
110
95.0
19
2.83
115
104
20
3.14
120
113
21
3.46
125
123
22
3.80
130
133
23
4.15
135
143
24
4.52
140
154
25
4.91
145
165
26
5.31
150
177
27
5.72
155
189
28
6.15
160
201
29
6.60
165
214
30
7.07
170
227
31
7.54
180
254
32
8.04
190
283
33
8.55
200
314
34
9.07
210
323
35
9.62
220
344
36
10.2
230
364
38
11.3
240
385
40
12.6
250
406
42
13.8
260
426
45
15.9
270
447
48
18.1
280
468
50
19.6
290
488
53
22.1
300
509
55
23.7


Note: The theoretical weight in the table is calculated according to the density of 7.85g/m3.


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