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JIS G3461 Carbon Steel Tubes for Boiler and Heat Exchanger

Publisher:TianchengTime:2018-07-08Number:74

JIS G3461 Carbon Steel Tubes for Boiler and Heat Exchanger

Scope:JIS G3461 Carbon Steel Tubes is mainly used for exchanging heat on the inside and outside of the tube, such as water tubes, smoke tubes, superheater tubes, air preheater tubes, etc.Its application fields are: boiler tubes, heat exchanger tubes, condenser tubes, catalyzer tubes, etc. It can also be used in chemical and petroleum industries, But it can't be used for low temperature service.

 

Chemical Composition:

 GradeMfg.

Process

Chemical Composition (%)
CSiMnPSNiCrMoOthers
STB35S, E0.18Max0.35Max0.30~0.600.035Max0.035Max----
STB42S, E0.32Max0.35Max0.30~0.600.035Max0.035Max----
STB52S, E0.25Max0.35Max1.00~1.500.035Max0.035Max----

Mechanical Properties:

  Symbol of class Tensile strength

N/mm2

{kgf/mm2}

 Yield point or proof stress
N/mm2

{kgf/mm2}

Elongation %
Outside diameter 20mm or overOutside diameter 10mm or over to and excl. 10mmOutside diameter under 10mm
No. 11 test piece No. 12 test pieceNo. 11 test pieceNo. 11 test piece
STB340

STB410

STB510

340{35}min.

410{42} min.

510{52} min.

175{18} min.

255{26} min.

295{30} min.

35 min.

25 min.

25 min.

30 min.

20 min.

20 min.

27 min.

17 min.

17 min.

Manufacture Method:

 Symbol of classHeat treatment
Hot finished seamless steel tubeCold finished seamless steel tubeElectric resistance welded steel tube other than hot finished or cold finished steel tubeFinished electric resistance welded steel tubeFold finished electric resistance welded steel tube
STB 340As manufactured, as required, low temperature annealing or normalizing may be performed.Low temperature annealing, normalizing or full annealing.NormalizingAs manufactured. However, as required, low temperature annealing or normalizing may be performed.   Normalizing
STB 410As manufactured. However, as required, low temperature annealing or normalizing may be performed.Low temperature annealing, normalizing or full annealing.NormalizingLow temperature annealing
STB 510Normalizing


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