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Square tube is formed from coil and then ran through a series of dies.lt's welded from the inside to form its shape. Square tubes aregenerally used for maintenance and structural purposes.
Some examples of square tubing applications would be building construction, railings, and sign posts. They are measured by theiroutside dimensions and their wall thickness.
square Tube is available in the following metal types:Alloy Steel
Mild SteelCarbon Steelstainless Steel
Square tube has similar uses to RHSand is used for both industrial and construction applications. Square section RHS is available inthe same thicknesses as RHS and dimensions range from 20 mm x 20 mm to 400 mm x 400 mm.
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Size by Inch (diameter) |
Thickness |
Sizes by MM (diameter) |
Thickness |
|
inch |
inch |
mm |
mm |
|
1/2" x 1/2" |
0.065" |
16mm×16mm |
0.4mm～1.5mm |
|
3/4" x 3/4" |
0.049" |
18mm×18mm |
0.4mm～1.5mm |
|
0.065" |
20mm×20mm |
0.4mm～3mm |
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|
0.083" |
22mm×22mm |
0.4mm～3mm |
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|
0.120" |
25mm×25mm |
0.6mm～3mm |
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|
1" x 1" |
0.049" |
30mm×30mm |
0.6mm～4mm |
|
0.058" |
32mm×32mm |
0.6mm～4mm |
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|
0.065" |
34mm×34mm |
1mm～2mm |
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|
0.072" |
35mm×35mm |
1mm～4mm |
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|
0.083" |
38mm×38mm |
1mm～4mm |
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|
0.095" |
40mm×40mm |
1mm～4.5mm |
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|
0.109" |
44mm×44mm |
1mm～4.5mm |
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|
0.120" |
45mm×45mm |
1mm～5mm |
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|
1 1/8" x 1 1/8" |
0.035" |
50mm×50mm |
1mm～5mm |
|
0.049" |
52mm×52mm |
1mm～5mm |
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|
0.065" |
60mm×60mm |
1mm～5mm |
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|
0.109" |
70mm×70mm |
2mm～6mm |
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|
0.120" |
75mm×75mm |
2mm～6mm |
|
|
1 1/4" x 1 1/4" |
0.049" |
76mm×76mm |
2mm～6mm |
|
0.065" |
80mm×80mm |
2mm～8mm |
|
|
0.072" |
85mm×85mm |
2mm～8mm |
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|
0.083" |
90mm×90mm |
2mm～8mm |
|
|
0.109" |
95mm×95mm |
2mm～8mm |
|
|
0.120" |
100mm×100mm |
2mm～8mm |
|
|
0.135" |
120mm×120mm |
4mm～8mm |
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|
0.156" |
125mm×125mm |
4mm～8mm |
|
|
0.188" |
130mm×130mm |
4mm～8mm |
|
|
1 1/2" x 1 1/2" |
0.049" |
140mm×140mm |
6mm～10mm |
|
0.065" |
150mm×150mm |
6mm～10mm |
|
|
0.072" |
160mm×160mm |
6mm～10mm |
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|
0.083" |
180mm×180mm |
6mm～12mm |
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|
0.109" |
200mm×200mm |
6mm～30mm |
|
|
0.120" |
220mm×220mm |
6mm～30mm |
|
|
0.140" |
250mm×250mm |
6mm～30mm |
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|
0.188" |
270mm×270mm |
6mm～30mm |
|
|
0.250" |
280mm×280mm |
6mm～30mm |
|
|
1 3/4" x 1 3/4" |
0.065" |
300mm×300mm |
8mm～30mm |
|
0.083" |
320mm×320mm |
8mm～30mm |
|
|
0.095" |
350mm×350mm |
8mm～30mm |
|
|
0.109" |
380mm×380mm |
8mm～30mm |
|
|
0.120" |
400mm×400mm |
8mm～30mm |
|
|
0.188" |
420mm×420mm |
10mm～30mm |
|
|
2" x 2" |
0.049" |
450mm×450mm |
10mm～30mm |
|
0.065" |
480mm×480mm |
10mm～30mm |
|
|
0.083" |
500mm×500mm |
10mm～30mm |
|
|
0.109" |
550mm×550mm |
10mm～40mm |
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|
0.120" |
600mm×600mm |
10mm～40mm |
|
|
0.145" |
700mm×700mm |
10mm～40mm |
|
|
0.165" |
800mm×800mm |
10mm～50mm |
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|
0.188" |
900mm×900mm |
10mm～50mm |
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|
0.250" |
1000mm×1000mm |
10mm～50mm |
|
|
0.312" |
|
|
|
|
2 1/4" x 2 1/4" |
0.188" |
|
|
|
0.250" |
|
|
|
|
2 1/2" x 2 1/2" |
0.083" |
|
|
|
0.109" |
|
|
|
|
0.120" |
|
|
|
|
0.188" |
|
|
|
|
0.250" |
|
|
|
|
0.312" |
|
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Dimensional Tolerances
|
Dimensional Tolerances |
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Outside Diameter: |
Twist: |
Maximum twist per 3 feet of length |
|
|
Largest outside dimension |
Outside tolerance including convexity and concavity |
Longest outside dimension |
|
|
up to 2 1/2" |
±.020" |
2" to 2 1/2"inclusive |
.062" |
|
over 21/2" to 31/2" inclusive |
±.025" |
over 21/2" to 4" inclusive |
.075" |
|
over 31/2" to 51/2" inclusive |
±.030" |
over 4" to 6" inclusive |
.087" |
|
over 51/2" |
±1% |
over 6" to 8" inclusive |
100" |
|
Tolerances include allowance for convexity or concavity. For |
over 8" |
112" |
|
|
Straightness: |
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|
.125" x (total length) ÷ 5 |
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Wall Thickness: |
Squareness of Sides: |
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|
Maximum allowable variation |
±10% |
Adjacent sides may deviate from 90° by a tolerance of plus or minus 2 degrees maximum. |
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(wall thickness is to be measured at the center of the flat, exclusive |
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Worner Radii: |
Flash: |
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The radius of any outside corner shal not exceed three times |
Structural tubing usually is supplied flash-in. The height of the |
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AS1163 hollow sections
Grade and Chemical Composition (％)
|
Steel |
Chemical composition( cast or product analysis％max. |
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|
C |
Si |
Mn |
P |
S |
Cr |
Mo |
Al |
Ti |
Micro-alloying |
CE |
|
|
C250 |
0.12 |
0.05 |
0.5 |
0.03 |
0.03 |
0.15 |
0.1 |
0.1 |
0.04 |
0.03 |
0.25 |
|
C350 |
0.2 |
0.25 |
1.6 |
0.03 |
0.03 |
0.3 |
0.1 |
0.1 |
0.04 |
0.15 |
0.43 |
|
C450 |
0.2 |
0.25 |
1.7 |
0.03 |
0.03 |
0.3 |
0.35 |
0.1 |
0.04 |
0.15 |
0.43 |
Mechanical Properties
|
Steel |
Minimum |
Minimum |
Minimum elongation as a propertion of the gauge length of5.65％ |
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|
Circular hollow sections |
Rectangular hollow sections |
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|
≦15 |
>15≦30 |
30 |
≦15 |
>15≦30 |
30 |
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|
C250,C250L0 |
250 |
320 |
18 |
20 |
22 |
14 |
16 |
18 |
|
C350,C350L0 |
350 |
430 |
16 |
18 |
20 |
12 |
14 |
16 |
|
C450,C450L0 |
450 |
500 |
12 |
14 |
16 |
10 |
12 |
14 |
Dimensional Tolerance
|
Characteristic |
Pipe (CHS) |
Rectangular & Square (RHS / SHS) |
|
|
External dimensions (d, b, d0) |
±1% with minimum of ±0.5mm& maximum ±10% |
±1% with minimum of ±0.5mm |
|
|
Thickness (t) |
d≤406.4mm |
±10% |
±10% |
|
|
d>406.4mm |
±10% with max of ±2mm |
|
|
All Sections has a mass not less than 96% of specified nominal mass |
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