JIS G3444 Seamless Carbon Steel Tube Standard specifies the carbon steel tubes (hereafter referred to as"tubes"), used for structure of civil engineering and architecture, such as steel towers, scaffoldings, footing piles, foundation piles, piles for landslide suppression and so on. In application for foundation piles, however, this Standard is only applicable to welded steel tubes of outside diameter under 318.5 mm, and in application for piles for landslide suppression, to seamless steel tubes and welded steel tubes of outside diameter under 318.5 mm 1. The dimensional range covered by this Standard is generally outside diameter 21.7 mm to 1 016.0 mm.
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
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 |
JIS G3444 seamless carbon steel tube widely used in civil engineering, construction,building, iron towers, scaffolding, pillars, landslide steel piles.
Surface: Bare pipe, Oiled,Black paint Galvanized.
Package: hexagonal bundled or loose packing.
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