JIS G3444 STK400 steel pipes Mechanical Properties
JIS G3444 STK400 steel pipes/tubes Chemical Composition
Symbol of class |
C |
Si |
Mn |
P |
S |
|
STK400 |
0.25 max |
- |
- |
0.040 max |
0.040 max |
JIS G3444 STK400 steel pipes/tubes Mechanical Properties
Mechanical properties |
Tensile strength N/mm2 |
Yield point or proof stress N/mm2 |
Elongation % |
Bendability |
Flattening |
Tensile strength in welded zone N/mm2 |
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|
No.11 and No.12 test pieces |
No.5 test piece |
Bend angle |
Inside radius (D: outside diameter of tube) |
Distance between flattening plates (H) (D: outside diameter of tube) |
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|
Longitudinal direction |
Transverse direction |
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Method of manufacture |
Seamless, butt-welding, electric resistance welding and arc welding process |
Seamless, butt-welding, electric resistance welding process |
Seamless, butt-welding, electric resistance welding process |
Arc welding process |
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|
Outside diameter |
Full range |
Full range |
Over 40 mm |
50 mm or under |
Full range |
Over 350 mm |
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|
STK400 |
400 min |
235 min |
23 min |
18 min |
90° 6D |
2/3D |
400 min |
|
JIS G3444 is the standard of carbon steel tubes for general structural purposes, STK400 steel tubes/pipes used for civil engineering, architecture, steel towers, scaffoldings, struts, piles for suppression of landslide and other structures.
JIS G3444 STK400 steel pipes heat treatment
Quenched
Tempered
Annealed
As a JIS G3444 STK400 steel pipes manufacturer, we usually keep hundreds tonsJIS G3444 STK400 steel pipes in stock each month. Based on these stock source, our advantage has spread into steel process like : cutting ( any size and any shape ) drilling, welding, milling, welding. We can also provide the JIS G3444 STK400 steel pipes in machining parts and steel structure.
