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- The name :
Big Diameter Welded Rectangular Seamed Steel Tubing and Pipe
- Product Description
- JIS G 3466 Carbon Steel Square and rectangle tubes for general structure
Standard JIS G 3466
Big Diameter Welded Steel Tube Diameter Range 5-420mm - Model :
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Instruction
JIS G 3466 Carbon Steel Square and rectangle tubes for general structure
Standard JIS G 3466
Big Diameter Welded Steel Tube Diameter Range 5-420mm
Wall thickness 0.5-50mm
Length 12m max
Application: for general structural purposes
Welding Rectangular Tubing Production method:
Forming welded steel tubes
Seamed Pipe or Seamless steel tubes into rectangle or square
Forming a steel sheet in coil into square section or into one pair of channel section followed by a continuous electric resistance welding or automatic arc welding process.
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CHEMICAL COMPOSITION % max |
|||||
|
Steel grade |
C |
Si |
Mn |
P |
S |
|
STKR 400 |
0.25 |
- |
- |
0.04 |
0.04 |
|
STKR 490 |
0.18 |
0.55 |
1.5 |
0.04 |
0.04 |
| MECHANICAL PROPERTIES min | |||
| Steel grade | Tensile strength Mpa | Yield point or proof stress Mpa | Elongation % |
| STKR 400 | 400 | 245 | 23 |
| STKR 490 | 490 | 325 | 23 |
|
Dimensional tolerance |
||
|
Specified item and dimension |
Dimensional tolerance |
|
|
length of side |
100mm or under |
±1.5mm |
|
over 100mm |
±1.5% |
|
|
Unvenness of flat plate portions |
side length 100mm or under |
0.5mm max |
|
side length over 100mm |
within 0.5% of side length |
|
|
Angularity made by adjacent flat plate portions
|
±1.5° |
|
|
Dimension at corner:s |
3t max |
|
|
Length |
+ not specified 0 |
|
|
Un-straightness |
Within 0.3% |
|
|
Wall thickness :t |
Square steel tube manufacture by welding |
under 3 mm ±0.3mm |
|
Seamless square steel tube |
under 4mm ±0.6mm |
|
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