Welding Black Steel Tubes

Welding Black Steel Tubes

JIS G3131 ( Hot Rolled Steel Coil )

Round Tube

Oval Tube

Outside DiameterWall Thickness
6 分1.5mm - 2.0mm
7 分1.5mm - 2.3mm
1"1.5mm - 3.0mm
1⅛"1.5mm - 3.0mm
1¼"1.5mm - 4.0mm
1½"1.5mm - 4.0mm
42 mm1.5mm - 4.0mm
1¾" (44.5 mm)1.5mm - 4.0mm
48 mm1.5mm - 4.0mm
2"1.5mm - 4.0mm
57 mm1.5mm - 4.0mm
60 mm1.5mm - 4.0mm
2 ½" 1.5mm - 4.0mm
3"1.5mm - 4.0mm
89 mm2.0mm - 4.0mm

Outside DiameterWall Thickness
20mm×40mm1.5mm - 2.0mm
20mm×60mm1.5mm - 2.0mm
30mm×60mm1.5mm - 2.5mm
30mm×70mm1.5mm - 3.0mm
40mm×80mm1.5mm - 3.0mm
25mm×50mm1.5mm - 3.0mm
40mm×97mm1.5mm - 3.0mm
40mm×118mm2.0mm - 3.0mm
50mm×100mm2.0mm - 3.0mm

Square Tube

Rectangular Tube

Outside DiameterWall Thickness
20mm×20mm1.5mm - 2.0mm
1"×1"1.5mm - 3.0mm
30mm×30mm1.5mm - 3.0mm
32mm×32mm1.5mm - 3.0mm
33.4mm×33.4mm1.5mm - 4.0mm
38mm×38mm1.5mm - 4.0mm
40mm×40mm1.5mm - 4.0mm
45mm×45mm1.5mm - 4.0mm
50mm×50mm1.5mm - 4.0mm
60mm×60mm1.5mm - 4.0mm
75mm×75mm1.8mm - 4.0mm

Outside DiameterWall Thickness
15mm×30mm1.5mm - 2.0mm
½"×1½"1.5mm - 2.0mm
20mm×40mm1.5mm - 3.0mm
25mm×50mm
1"×2"
1.5mm - 3.0mm
23.5mm×53.5mm1.5mm - 3.0mm
30mm×60mm1.5mm - 4.0mm
40mm×80mm1.5mm - 4.0mm
13mm×26mm1.5mm - 2.0mm
1"×1½"1.5mm - 2.0mm
30mm×50mm1.5mm - 3.0mm
38mm×50mm1.5mm - 3.0mm
40mm×60mm1.5mm - 4.0mm
45mm×75mm1.5mm - 4.0mm
50mm×75mm1.8mm - 4.0mm
50mm×100mm1.8mm - 4.0mm
25mm×75mm
1"×3"
1.5mm - 4.0mm

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