JIS G3461 G3462 Carbon steel Alloy steel 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.

The main products of steel / steel grade:

锅炉及换热器用钢管

Standard:

Size (mm):

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.

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.

JIS G3461 Equivalent steel grade:
JIS G3461 ASTM ASME BS DIN ISO ABS NK LRS DNV
STB 340 A178 SA178 A 3059-P1 320 17175 st 35.8   ABS D KSTB 33 Sec 6 320 Sec 4-E-TS360
STB 410 A178 C SA178 C 3059-P2 440 17175 st 45.8   ABS F KSTB 42 Sec 6 410 Sec 4-E-TS410-1
STB 510       17175 19Mn 5         Sec 4-E-TS510

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.

Manufacture Method:
 Symbol of class Heat treatment
Hot finished seamless steel tube Cold finished seamless steel tube Electric resistance welded steel tube other than hot finished or cold finished steel tube Finished electric resistance welded steel tube Fold finished electric resistance welded steel tube
STB 340 As manufactured, as required, low temperature annealing or normalizing may be performed. Low temperature annealing, normalizing or full annealing. Normalizing As manufactured. However, as required, low temperature annealing or normalizing may be performed.    Normalizing
STB 410 As manufactured. However, as required, low temperature annealing or normalizing may be performed. Low temperature annealing, normalizing or full annealing. Normalizing Low temperature annealing
STB 510 Normalizing

We also offer steel fabrication service where steel plates can go through processings like cutting, welding, bending, machining, pre-coating, pre-lined, beveling, or as you require. Our steel mills have fabricating employees that have 5-10 years of working experience. If you are interested in buying JIS G3461 steel tube products, contact us now for the latest price or check the following table for equivalent steel grade of JIS G3461.

JIS G3462 Equivalent Steel Grade:
KS ASTM JIS DIN BS
Grade number GRADE Grade number GRADE Grade number GRADE Grade number GRADE Grade number
D 3572 STHA12 A161
A209
T1
T1
G 3462 STBA12 17175 15Mo 3 -
STHA13 A209 T1a STBA13 - - - -
STHA20 A213 T2 STBA20 - - - -
STHA22 A213 T12 STBA22 17175 13Cr Mo 44 3059  S1 620
S2 620
ERW620
CEW620
STHA23 A199
A200
A213
T11
T11
T11
STBA23 - - - -
STHA24 A199
A200
A213
T22
T22
T22
STBA24 17175 10Cr Mo910 3059 S1 622-440
S2 622-440
STHA25 A199
A200
A210
T5
T5
T5
STBA25 - - - -
STHA26 A199
A200
A213
T9
T9
T9
STBA26 - - - -

We can supply JIS G3462 steel tube from stock or from reputed steel mills.

JIS G3462 Heat treatment:
Symbol of class JIS G3462 Heat treatment
STBA 12
STBA 13
Low temperature annealing, isothermal annealing, full annealing, normalizing or normalizing followed by tempering
STBA 20
STBA 22
Low temperature annealing, isothermal annealing, full annealing, normalizing or normalizing followed by tempering
STBA 23
STBA 24
STBA 25
STBA 26
Isothermal annealing, full annealing or normalizing followed by tempering

 



Tech & Service of Seamless pipe

Seamless pipes are extensively applied for the nuclear device, gas, petrochemical, ship building and boiler industries. Seamless pipes dominates 65% of market share in Chinese boiler industry.

How to make seamless pipe(seamless pipe process)?
Hot Piercing Workshop
Piercing process
The cross roll piercing and pilger rolling process in the size range from approx. 250 to 660 mm outside diameter.
Precision cold drawn steel tube production process
Pipe weld cracks
often follow different mechanisms can be divided into two types of thermal cracking and cold cracking.
How to calculate a steel pipe and tube theoretic weight
Calculate a steel pipe?
Pipe fittings are necessary to join together pipes, or to change the direction of an existing pipe.
Pipe beveling
Pipe beveling is the process where an angle is formed between the edge of the end of a pipe or tube and a plane perpendicular to the surface.
Steel pipe cutting machine
Pipe cutting
Cutting tools have a grinding wheel piece cutting machine (also known as toothless saw), hand saw, cutter and other hand tools.
How to calculate a steel pipe and tube theoretic weight
Packing the steel pipes
There are probably hundreds of different methods for packing a pipe, and most of them have merit, but there are two principles that are vital for any method.
Condition on delivery:

It refers to the state of final plastic deformation or final heat treatment of the delivered product. The hot-rolled or cold drawn (rolled) state or manufacturing state generally delivered without heat treatment; the heat-treated state after heat treatment delivery, or the normalizing, tempering, solid solution, annealing according to the type of heat treatment status.

Delivery status Abbreviation Description

Cold-finished/hard
(cold-finished as-drawn)

BK No heat treatment after the last cold-forming process. The tubes therefore have only low deformability.
Cold-finished/soft
(lightly cold-worked)
BKW After the last heat treatment there is a light finishing pass (cold drawing) With proper subsequent processing, the tube can be cold-formed (e.g. bent, expanded) within certain limits.
Annealed GBK After the final cold-forming process the tubes are annealed in a controlled atmosphere or under vacuum.
Normalized NBK The tubes are annealed above the upper transformation point in a controlled atmosphere or under vacuum.

Delivery according to actual weight or delivery according to theoretical weight

 


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