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
 
 | 
 
 
 
 |