Active Member
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[China]
Address: Daqiao Developing Zone Haiyan,Zhejiang Province,China
Contact name:Richard
Torich International Limited |
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JIS G 3466 SS400 STKR 400 STKR490 galvanized square hollow section 40x40x2.5
Special shape : Square and retangle shape seamless steel tubes
JIS G 3466 Carbon Steel Square and Rectangle tubes for general structure
Standard JIS G 3466
Deminsion 420mm*420mm upon requests
Wall thickness 0.5-50mm
Length 12m max
Application :for general structural purposes
Produce method:
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 | Yeild 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 | |
More: Torich JIS G3444 3466 Standard STK400 STKR 400 STKR490 Square Steel Pipe 20x20x2 used as table leg Square and rectangle Weight:
W=0.0157t(A+B-3.287t)
Coating: Hot dip zinc coating
Electrolytic zinc coating
Hot dip aluminium -coated
Hot dip zinc-5% aluminium alloy-coated
Hot dip 55% aluminium alloy coated
End: plain or charmfering
