JIS G3444 specifies welded or seamless carbon steel pipes for general structural purposes, civil engineering, construction, steel towers, scaffolding, pillars, piles for landslide suppression, and other structures. STK400 is a steel grade material that complies with JIS standards.
Grade: STK400
Outer diameter: 21.7-609.6mm
Wall thickness: 2-22mm
Length: 0.8-18m
Manufacturing method: hot rolling
Surface treatment: coating, painting, galvanizing, etc.
Dimensions of JIS G3444 STK400 Structural Steel Tube:
Outside diameter mm
|
Thickness mm
|
Unit mass kg/m
|
Informative reference
|
Cross-sectional area
|
Geometrical moment of inertia
|
Modulus of section
|
Radius of gyration of area
|
21.7
|
2
|
0.972
|
1.238
|
0.607
|
0.56
|
0.7
|
27.2
|
2
|
1.24
|
1.583
|
1.26
|
0.93
|
0.89
|
2.3
|
1.41
|
1.799
|
1.41
|
1.03
|
0.88
|
34
|
2.3
|
1.8
|
2.291
|
2.89
|
1.7
|
1.12
|
42.7
|
2.3
|
2.29
|
2.919
|
5.97
|
2.8
|
1.43
|
2.5
|
2.49
|
3.157
|
6.4
|
3
|
1.42
|
2.8
|
2.76
|
3.51
|
7.02
|
3.29
|
1.41
|
48.6
|
2.3
|
2.63
|
3.345
|
8.99
|
3.7
|
1.64
|
2.5
|
2.84
|
3.621
|
9.65
|
3.97
|
1.63
|
2.8
|
3.16
|
4.029
|
10.6
|
4.36
|
1.62
|
3.2
|
3.58
|
4.564
|
11.8
|
4.86`
|
1.61
|
60.5
|
2.3
|
3.3
|
4.205
|
17.8
|
5.9
|
2.06
|
3.2
|
4.52
|
5.76
|
23.7
|
7.84
|
2.03
|
4
|
5.57
|
7.1
|
28.5
|
9.41
|
2
|
76.3
|
2.8
|
5.08
|
6.465
|
43.7
|
11.5
|
2.6
|
3.2
|
5.77
|
7.349
|
49.2
|
12.9
|
2.59
|
4
|
7.13
|
9.085
|
59.5
|
15.6
|
2.56
|
89.1
|
2.8
|
5.96
|
7.591
|
70.7
|
15.9
|
3.05
|
3.2
|
6.78
|
8.636
|
79.8
|
17.9
|
3.04
|
4
|
8.39
|
10.69
|
97
|
21.8
|
3.01
|
101.6
|
3.2
|
7.76
|
9.892
|
120
|
23.6
|
3.48
|
4
|
9.63
|
12.26
|
146
|
28.8
|
3.45
|
5
|
11.9
|
15.17
|
177
|
34.9
|
3.42
|
114.3
|
3.2
|
8.77
|
11.17
|
172
|
30.2
|
3.93
|
3.6
|
9.83
|
12.52
|
192
|
33.6
|
3.92
|
4.5
|
12.2
|
15.52
|
234
|
41
|
3.89
|
5.6
|
15
|
19.12
|
283
|
49.6
|
3.85
|
139.8
|
3.6
|
12.1
|
15.4
|
357
|
51.1
|
4.82
|
4
|
13.4
|
17.07
|
394
|
56.3
|
4.8
|
4.5
|
15
|
19.13
|
438
|
62.7
|
4.79
|
6
|
19.8
|
25.22
|
566
|
80.9
|
4.74
|
165.2
|
4.5
|
17.8
|
22.72
|
734
|
88.9
|
5.68
|
5
|
19.8
|
25.16
|
808
|
97.8
|
5.67
|
6
|
23.6
|
30.01
|
952
|
115
|
5.63
|
7
|
27.3
|
34.79
|
109]10
|
132
|
5.6
|
190.7
|
4.5
|
20.7
|
26.32
|
114]10
|
120
|
6.59
|
5
|
22.9
|
29.17
|
126]10
|
132
|
6.57
|
6
|
27.3
|
34.82
|
149]10
|
156
|
6.53
|
7
|
31.7
|
40.4
|
171]10
|
179
|
6.5
|
216.3
|
4.5
|
23.5
|
29.94
|
168]10
|
155
|
7.49
|
6
|
31.1
|
39.61
|
219]10
|
203
|
7.44
|
7
|
36.1
|
46.03
|
252]10
|
233
|
7.4
|
8
|
41.1
|
52.35
|
284]10
|
263
|
7.37
|
267.4
|
6
|
38.7
|
49.27
|
421]10
|
315
|
9.24
|
7
|
45
|
57.27
|
486]10
|
363
|
9.21
|
8
|
51.2
|
65.19
|
549]10
|
411
|
9.18
|
9
|
57.4
|
73.06
|
611]10
|
457
|
9.14
|
318.5
|
6
|
46.2
|
58.91
|
719]10
|
452
|
11.1
|
7
|
53.8
|
68.5
|
831]10
|
552
|
11
|
8
|
61.3
|
78.04
|
941]10
|
591
|
11
|
9
|
68.7
|
87.51
|
105]102
|
659
|
10.9
|
355.6
|
6.3
|
54.3
|
69.13
|
105]102
|
593
|
12.4
|
8
|
68.6
|
87.36
|
132]102
|
742
|
12.3
|
9
|
76.9
|
98
|
147]102
|
828
|
12.3
|
12
|
102
|
129.5
|
191]102
|
108]10
|
12.2
|
406.4
|
9
|
88.2
|
112.4
|
222]102
|
109]10
|
14.1
|
12
|
117
|
148.7
|
289]102
|
142]10
|
14
|
16
|
154
|
196.2
|
374]102
|
184]10
|
13.8
|
19
|
182
|
231.2
|
435]102
|
214]10
|
13.7
|
457.2
|
9
|
99.5
|
126.7
|
318]102
|
140]10
|
15.8
|
12
|
132
|
167.8
|
416]102
|
182]10
|
15.7
|
16
|
174
|
221.8
|
540]102
|
236]10
|
15.6
|
19
|
205
|
261.6
|
629]102
|
275]10
|
15.5
|
500
|
9
|
109
|
138.8
|
418]102
|
167]10
|
17.4
|
12
|
144
|
184
|
548]102
|
219]10
|
17.3
|
14
|
168
|
213.8
|
632]102
|
253]10
|
17.2
|
508
|
9
|
111
|
141.1
|
439]102
|
173]10
|
17.6
|
12
|
147
|
187
|
575]102
|
226]10
|
17.5
|
14
|
171
|
217.3
|
663]102
|
261]10
|
17.5
|
16
|
194
|
247.3
|
749]102
|
295]10
|
17.4
|
19
|
229
|
291.9
|
874]102
|
344]10
|
17.3
|
22
|
264
|
335.9
|
994]102
|
391]10
|
17.2
|
558.8
|
9
|
122
|
155.5
|
588]102
|
210]10
|
19.4
|
12
|
162
|
206.1
|
771]102
|
276]10
|
19.3
|
16
|
214
|
272.8
|
101]103
|
360]10
|
19.2
|
19
|
253
|
322.2
|
118]103
|
421]10
|
19.1
|
22
|
291
|
371
|
134]103
|
479]10
|
19
|
600
|
9
|
131
|
167.1
|
730]102
|
243]10
|
|
12
|
174
|
221.7
|
958]102
|
320]10
|
20.9
|
14
|
202
|
257.7
|
111]103
|
369]10
|
20.8
|
16
|
230
|
293.6
|
125]103
|
418]10
|
20.7
|
609.6
|
9
|
133
|
169.8
|
766]102
|
251]10
|
|
12
|
177
|
225.3
|
101]103
|
330]10
|
21.2
|
14
|
206
|
262
|
116]103
|
381]10
|
21.1
|
16
|
234
|
298.4
|
132]103
|
432]10
|
21.1
|
19
|
277
|
352.5
|
154]103
|
505]10
|
|
22
|
319
|
406.1
|
176]103
|
576]10
|
|