Jis G 3444 Standard

JIS G 3444 Standard

Exporter and Suppliers of JIS G 3444 Stk-400 and JIS G 3444 Stk490

Seamless Pipe

Seamless Pipe

Welded Pipe

Welded Pipe

ERW Pipe

ERW Pipe

JIS G3444 Structural Steel Tube

JIS G3444 indicated welded or consistent carbon steel tubes for general auxiliary purposes,civil designing, engineering, steel towers, frameworks, swaggers, heaps for concealment of avalanche and different structures

  • Grade:STK290,STK400,STK490,STK500,STK540
  • Outer diameter: 33.4-660mm
  • Wall thickness:2.1-22mm
  • Length:0.8-18m
  • suppliers Method: Hot Rolled.
  • Surface Treatment: Coating, Painting, Galvanized, etc.

Product Specification

Commodity JIS G 3444 Stk400 Stk490 Stk500 ERW Structural Steel Pipe
Outer diameter ERW / HFW LSAW / DSAW SSAW / HSAW RHS SHS
1/8 - 20 inch
(10.3 - 508 mm)
12 - 56 inch
(323.8 - 1,420 mm)
8 - 126 inch
(219.1 - 3,200 mm)
40 x 20 mm -
1,000 x 800 mm
15 x 15 mm -
1,000 × 1,000 mm
Wall thickness 0.4 - 16 mm 6.0 - 40 mm 6.0 - 26 mm 1.0 - 30 mm 0.6 - 30 mm
Length 5.8 ~ 12.0 m or upon customers' requirements
Standard GB/T 3091, GB/T 13793, ASTM A252, ASTM A53, ASTM A500, EN 10210, EN 10219, API 5L, DIN 1626/1615, DIN 17120, etc.
Grade SS400, Q235, Q345, Q460, A572 Gr.50, Gr.1/Gr.2/Gr.3, S235, S275, S355, Grade A/B, X42, X52, X60, X70, etc.
Surface Prime quality (bared, oiled, color paint, 3LPE, or other anti-corrosive treatment)
Inspection With Chemical Composition and Mechanical Properties Analysis;
Dimensional and Visual Inspection, also with Nondestructive Inspection.
Application structure, electric power transmission tower projects, piling, water, oil & gas pipeline engineering, mechanical industry, municipal projects, roads and its auxiliary facilities, etc.
Packing Standard export, in bulk / bundles / nylon fabric bags with seaworthy packing;
or according to customers' requestments.
Delivery Time 1. 20-45 days after received deposit or confirmed L/C
2. Depends on your order quantity
Payment Terms 1. T/T: 30% T/T advance, 70% balance copy of  B/L
2. L/C: at sight
3. T/T and L/C: 30% T/T advance, 70% L/C
Port China main port

JIS G3444 structural steel tube dimension table:

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
.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

6 46.2 58.91 719?10 452 11.1

7 53.8 68.5 831?10 552 11
318.5 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
00 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

JIS G3444 structural steel tube chemical composition:

Steel Grade

Chemical  Composition %

C Si Mn P S
STK 400 0.25 max. - - 0.040 max. 0.040 max.
STK 490 0.18 max. 0.55 max. 1.50 max. 0.040 max. 0.040 max.

JIS G3444 structural steel tube mechanical property:

Steel Grade Tensile strength Yield Strength Elongation %
N/kgf N/kgf (No.5 test piece)
STK 400 400 {41} min. 245 {25} min. 23 min.
STK 490 490 {50} min. 325 {33} min. 23 min.