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JIS G3461 STB340 Carbon Steel Tubes For Boiler OD 19.05mm ~ 168.3mm
Standard: JIS G3461
Main steel grades: STB340, STB410, STB510
Application: JIS G3461 steel tube can be widely used as boiler water tube, smoke tube, superheater tube, air preheating tube, accessories for transferring heat inside and outside the pipe.
Chemical Requirements & Mechanical Proterties:
| Standard | Grades | Chemical composition | |||||||||
| C | Si | Mn | P | S | Cr | Mo | Cu | Ni | V | ||
| JIS G3461 | STB340 | ≤0.18 | ≤0.35 | 0.30～0.60 | ≤0.035 | ≤0.035 | / | / | / | / | / |
| STB410 | ≤0.32 | ≤0.35 | 0.30～0.80 | ≤0.035 | ≤0.035 | / | / | / | / | / | |
| STB510 | ≤0.25 | ≤0.35 | 1.00～1.50 | ≤0.035 | ≤0.035 | / | / | / | / | / | |
| Standard | Grades | Tensile strength (MPa) | Tensile strength (MPa) | Elongation (%) |
| JIS G3461 | STB340 | ≥340 | ≥175 | ≥35 |
| STB410 | ≥410 | ≥255 | ≥25 | |
| STB510 | ≥510 | ≥295 | ≥25 |
Mark: As required.
Inspection and Test: chemical composition test, mechanical properties test(tensile, yield, elongation), process properties test(flatting, flaring, bending, hardness, impact, etc.), appearance and size test, non-destructive inspection test, hydrostastic test.
Delivery status: Annealed, normalized, normalized+Tempered, etc.
End: plain end, beveled end, threaded
End protection: plastic caps
Outside coating: black painting, anti-corrosion oil,galvanized finish, finish as per customer requirements.
Packing: Exporting package/wooden box /as requirement.
