JIS G3462 STBA23 Alloy Steel Seamless Tubes
JIS G3462 STBA23 Alloy steel boiler and heat exchanger tubes
JIS G3462 STBA23 Alloy steel boiler and heat exchanger tubes Quick Details
Type:Seamless Steel Pipe.
Wall thickness(WT): 5.0mm——14 mm.
Outer diameter (OD): 19.05mm——168.3 mm
Length: 6M or specified length as required.
Ends: Plain End, Beveled End, Treaded
Standard: JIS G3462
JIS G3462 Alloy steel boiler and heat exchanger tubes shall be classified into eight grades,STBA23 is a grade of JIS G3462.
JIS G3462 STBA23 Alloy Steel Tubes are mainly used for exchanging heat on within and in the vicinity of the underground. It can use as water tube, smoke tube, superheated tubes, air preheater tube, etc.Higher temperature resistance or capacity corrosion, end up being widely used by petroleum, chemical engineering, boiler, heat exchanger and other power areas.
JIS G3462 STBA23 alloy steel tubes are not applicable for heating furnaces and heat exchangers for low temperature service.
Method of Manufacture
JIS G3462 STBA23 Alloy Steel Tubes shall be manufactured by seamless process.
||Isothermal annealing, full annealing or normalizing followed by tempering
Chemical Composition (Unit: %)
||Chemical Composition Limits (%)
||Tensile Property (N/mm2)
||Yield Point or Yield Strength (N/mm2)
|OD ≥ 20 mm
||10 mm ≤ OD ＜20 mm
||OD ＜10 mm
|NO. 11 Sample; NO. 12 Sample
||NO. 11 Sample
||NO. 11 Sample
1. The above table is only applicable for heat exchanger alloy steel pipes. The buyer can appoint the upper limit value of tensile strength. The upper limit value of tensile strength is the above shown value plus 147 N/mm2.
2. For the alloy steel tube with the thickness of less than 8 mm, we use NO.12 sample for tensile test. The minimum elongation will be reduced by 1.5% from the table value when the thickness reduces 1 mm. The value obtained will be rounded to an integer value according to JIS Z 8401 (a rounding method).
3. When we take the electric resistance welded steel pipes for tensile test, we also choose NO.12 sample from the parts not containing welding seams.
Chemical Analysis, Tensile Test , Flattening test, Flaring test, Reverse Flattening Test , Hydrostatic Test or Nondestructive Examination.
We can customize and innovate the JIS G3462 STBA23 Alloy steel tubes with advanced technology. Our all tubes are tested in accordance to internationally recognized standards or our own more stringent internal test procedures, which is developed considering the harsh field conditions. Tension test, flattening test, flaring test, hardness test, hydrostatic or nondestructive electric test be made on specimens.