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JIS G3461

Seamless carbon steel boiler tube

JIS G3461 Seamless Carbon Steel Boiler and Heat-exchanger tubes

Application: This type tube is widely used for superheater,boiler, shell & tube bundle heat-exchanger, condenser and similar heat transfer equipments.


Standard: JIS G3461

OD: 12.7-177.8 mm

WT:2.2-15 mm

Length: 25 meters(Max)


Fabricating process: Seamless & Cold drawn

Heat treatment: Annealed

Non-destructive test:  100% Eddy Current Test

Package: Bundle package or plywood box

Standead   Grade Chemical  Composition%
C Mn P S Si
JIS G3461 STB 340 ≤0.18 0.30-0.60 ≤0.035 ≤0.035 ≤0.35
STB 410 ≤0.32 0.30-0.80 ≤0.035 ≤0.035 ≤0.35


Standead   Grade  Chemical Composition%
Tensile Strength(Mpa) Yield Strength(Mpa) Elongation(%)
JIS G3461 STB 340 ≥340 ≥175 ≥35
STB 410 ≥410 ≥255 ≥25
Category: Economizer tube

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