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JIS G3461,G3462 boiler and heat exchanger tubes

JIS G3461,G3462 Carbon steel/Alloy steel boiler and heat exchanger tubes used for exchanging heat on the inside and outside of the tube, such as water tubes, smoke tubes, superherater tubes, air preheater tubes, etc.

Standard:
  • JIS G3461 Carbon steel boiler and heat exchanger tubes
  • JIS G3462 Alloy steel boiler and heat exchanger tubes
锅炉及换热器用钢管
Size (mm):

Outer Dimensions: 19.05mm ~ 168.3mm
Wall Thickness:2.0mm ~ 14 mm
Length: max 19000mm

Application:

used for exchanging heat on the inside and outside of the tube, such as water tubes, smoke tubes, superherater tubes, air preheater tubes, etc. of boilers, and heat exchanger industries. it is not applicable to the steel tubes for heating furnace and those for heat exchangers for low temperature service.

The main products of steel / steel grade:
  • G3461(STB340, STB410, STB510)
  • G3462(STBA22, STBA23).

Packing: Bare/bundles/crates/crate protection at the both sides of tubes or as per customers' requirements.
Painting: as requested.

Chemical Compositions(%):

Grade C Si Mn P S Cr Mo
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 / /
STBA22 ≤0.15 ≤0.50 0.30-0.60 ≤0.035 ≤0.035 0.80-1.25 0.45-0.65
STBA23 ≤0.15 0.50-1.00 0.30-0.60 ≤0.030 ≤0.030 1.00-1.50 0.45-0.65
Mechanical Properties:
Grade Yield Strength (Mpa) Tensile Strength (Mpa) Elongation (%)
STB340 ≥175 ≥340 ≥35
STB410 ≥255 ≥410 ≥25
STB510 ≥295 ≥510 ≥25
STBA22 ≥206 ≥412 ≥30
STBA23 ≥206 ≥412 ≥30

The tubes shall be manufactured by seamless process, electric resistance welding process, or butt welding process, and those of other grades shall be manufactured by seamless process or electric resistance welding process. The tube shall be as manufactured or as cold-finished condition, or they shall be subjected to appropriate heat treatment.

The tubes shall be practically straight. and the two ends shall be at right angles to the axis of the tube. The tubes shall be free from defects detrimental to practical use.




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