JIS G3444 Seamless Carbon Steel Tube
Steel grade: STK 30, STK 41, STK 50, STK 51, STK 55
Application: Carbon Steel Tubes for General Structural Purpose
Dimension Range: 21.7-1016.0 mm
JIS – Japanese Industrial Standard
Grades of symbols
Symbol of Class | Former symbol |
STK 290 | STK 30 |
STK 400 | STK41 |
STK 500 | STK51 |
STK490 | STK50 |
STK 540 | STK55 |
Chemical Composition
Symbol of grade | C | Si | Mn | P | S |
STK290 | - | - | - | 0.05max | 0.05max |
STK400 | 0.25max | - | - | 0.04max | 0.04max |
STL500 | 0.24max | 0.35max | 0.3-1.3 | 0.04max | 0.04max |
STK490 | 0.18max | 0.55max | 1.5max | 0.04max | 0.04max |
STK540 | 0.23max | 0.55max | 1.5max | 0.04max | 0.04max |
applications of JIS G3444 Seamless Carbon Steel Tube
This standard applies to civil engineering, construction,building, iron towers, scaffolding, pillars, landslide steel piles and other structural carbon steel pipes.
Surface: Bare pipe, Oiled,Black paint Galvanized.
Package: hexagonal bundled or loose packing.
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