JIS G3466 Carbon Steel Square for general structural purposes.
JIS G3466 Carbon Steel Square pipe is used for civil engineering architecture and other structure buidings. Manufacture method can be forming welded steel pipes(electric resistance welding. forging welding or automatic arc welding) or seamless pipes into shape of square section. JIS G3466 Carbon Steel Square pipe shall be manufactured with no heat treated method.
Chemical Composition:
|
Designation of grade |
Chemical Composition |
||||
|---|---|---|---|---|---|
| C | Si | Mn | P | S | |
| STKR 400 | 0.25 max. | - | - | 0.040 max. | 0.040 max. |
| STKR 490 | 0.18 max. | 0.55 max. | 1.50 max. | 0.040 max. | 0.040 max. |
Mechanical Property:
|
Designation of grade |
|||
|---|---|---|---|
|
Tensile strength
N/㎟{kgf/㎟} |
Yield point or proof stress
N/㎟{kgf/㎟} |
Elongation %
(No.5 test piece) |
|
| STKR 400 | 400 {41} min. | 245 {25} min. | 23 min. |
| STKR 490 | 490 {50} min. | 325 {33} min. | 23 min. |
