JIS G3462 STBA26 Alloy Steel Seamless Boiler Tubes
- JIS G3462
- China
- Stock
- STBA26
JIS G3462 STBA26 Alloy Steel Tubes are higher temperature resistance or capacity corrosion, being widely used by petroleum, chemical engineering, boiler, heat exchanger and other power areas.
JIS G3462 STBA26 Alloy Steel Seamless Boiler Tubes
JIS G3462 STBA26 Alloy Steel Boiler Tubes
JIS G3462 STBA26 Alloy steel boiler and heat exchanger tubes
Standard: JIS G3462
JIS G3462 STBA26 Alloy Steel Tubes are higher temperature resistance or capacity corrosion, being widely used by petroleum, chemical engineering, boiler, heat exchanger and other power areas.
JIS G3462 STBA26 alloy steel tube is not applicable for heating furnaces and heat exchangers for low temperature service.
JIS G3462 STBA26 Alloy steel boiler and heat exchanger tubes Quick Details
Type:Seamless Alloy Steel Pipe
Wall thickness(WT): 3.2mm——14 mm.
Outer diameter (OD): 19.05mm——168.3 mm
Length: 6M or specified length as required.
Ends: Plain End, Beveled End, Treaded
Additional Info
Port of Shipment: Tianjin, China
Payment Terms:T / T, LC
Delivery: 7-15 days after payment
Surface: Tubes will be varnished (Outside only) to prevent rust.
Marking: Standard + Steel Grade + Size + Heat No + Lot No
Package:Standard export package,suit for all kinds of transport, or as required
Method of Manufacture
The tubes of STBA26 shall be manufactured by seamless process.
Heat treatments
| Grade | Heat treatment |
| STBA 26 | Isothermal annealing, full annealing or normalizing followed by tempering |
Remark
1. Low temperature annealing shall not be applied to the electric resistance welded steel tube.
2. The tempering temperature for STHA26 shall be 650˚ or higher
Chemical Composition
| Standard | Grade | Chemical Composition Limits (%) | ||||||
| C | Si | Mn | P | S | Cr | Mo | ||
| JIS G3462 | STBA26 | ≤ 0.15 | 0.25-1.00 | 0.30-0.60 | ≤ 0.030 | ≤ 0.030 | 8.00-10.00 | 0.90-1.10 |
Mechanical Properties
| Grade | Tensile Property (N/mm2) | Yield Point or Yield Strength (N/mm2) | Elongation (%) | ||
| OD ≥ 20 mm | 10 mm ≤ OD ＜20 mm | OD ＜10 mm | |||
| NO. 11 Sample; NO. 12 Sample | NO. 11 Sample | NO. 11 Sample | |||
| Longitudinal | Transverse | Transverse | |||
| STBA26 | ≥ 412 | ≥ 206 | ≥ 30 | ≥ 25 | |
The dimensional tolerances of tube shall be as follows:
(1)The tolerance on the outside diameter of the tube
Tolerances on Outside Diameter Unit: mm
| Division of outside diameter | Tolerances on outside diamete | |||
| Hot finished seamless steel tube | Cold finished seamless steel tube | Electric resistance welded steel tube other than cold finished | Cold finished electric resistance welded steel tube | |
| Under 25 |
+0.4 -0.8 |
【0.10 | 【1.5 | 【0.10 |
| 25 or over to and excl. 40 | 【0.15 | 【0.20 | 【0.15 | |
| 40or over to and excl. 50 | 【0.20 | 【0.25 | 【0.20 | |
| 50 or over to and excl 60 | 【0.25 | 【0.30 | 【0.25 | |
| 60 or over to and excl. 80 | 【0.30 | 【0.40 | 【0.30 | |
| 80 or over to and excl. 100 | 【0.40 | +0.40 | 【0.40 | |
| -0.60 | ||||
| 100 or over to and excl.12 |
+0.4 -1.2 |
+0.40 -0.60 |
+0.40 -0.80 |
+0.40 |
| -0.60 | ||||
| 120 or over to and excl.160 |
+0.40 -0.80 |
+0.40 -1.00 |
+0.40 | |
| -0.80 | ||||
| 160 or over to and excl.200 | +0.4 | +0.40 | +0.40 | +0.40 |
| -1.8 | -1.20 | -1.20 | -1.20 | |
| 200 or over | +0.4 | +0.40 | +0.40 | +0.40 |
| -2.4 | -1.60 | -1.60 | -1.60 | |
Note:For the tolerances on the outside diameter of electric resistance welded steel tube other than cold finished, if specially required by the purchaser, the tolerances on the outside diameter of cold finished steel tube may substitute.
(2)Tolerances on Wall Thickness and on Thickness Deviation
| Tolerances |
Division of wall thickness (mm) |
Division of method of manufacture | Hot finished seamless steel tube | Cold finished seamless steel tube | Electric resistance welded steel tube | |||
| Division of outside diameter (mm) | Under 100 | 100 or over | Under 40 | 40 or over | Under 40 | 40 or over | ||
| Tolerances on wall thickness % | Under 2 | --- | --- | +0.4mm |
+22 0 |
+0.3 |
+18 0 |
|
| 0 | 0 | |||||||
| 2 or over to and excl. 2.4 | +40 | --- |
+20 0 |
+18 0 |
||||
| 0 | ||||||||
| 2.4 or over to or excl. 3.8 | +35 | +35 | ||||||
| 0 | 0 | |||||||
| 3.8 or over to or excl. 4.6 | +33 | +33 | ||||||
| 0 | 0 | |||||||
| 4.6 or over | +28 | +28 | ||||||
| 0 | 0 | |||||||
|
Tolerances on thickness disparity % |
--- | Within 22.8 of wall thickness | --- | --- | ||||
Note:The "thickness deviation" means the ratio of the difference between the maximum and the minimum thickness of the wall measured in the same section to the ordered wall thickness and shall not be applied to the tube under 5.6 mm in wall thickness
Testing items:
Chemical Analysis, Tensile Test , Flattening test, Flaring test, Reverse Flattening Test , Hydrostatic Test or Nondestructive Examination.
Types of Packaging:
- Bundles (hexagonal)
- Wooden Boxes
- Crates (steel/wooden)
- Special crates for U-Bend tubes with each radius separated
- Alloy Seamless Steel Pipe packing can meet any needs of the customers.
Delivery: 7-15 days after payment
Marking
The tubes which have passed the inspection shall be marked with the following items on each tube. However, the order of arranging the items is not specified.
Further, in the case of either smaller tubes or a request from the purchaser, the tubes may be bundled together and marked by a suitable method on each bundle.
Moreover, when approved by the purchaser, part of items may be omitted.
(1) Symbol of class
(2) Symbol representing the method of manufacture (³)
(3) Dimensions
(4) Manufacturer's name or its abbreviation
(5) Symbol representing the designation of special quality requirements: Z
Note ( 2 )
Note ( 2 )
Symbols representing the methods of manufacture shall be as follows:
However, the sign - may be replaced by a blank.
Hot finished seamless steel tube - S - H
Cold finished seamless steel tube - S -C
Electric resistance welded steel tube other than hot finished and cold finished - E - G
Hot finished electric resistance welded steel tube - E - H
Cold finished electric resistance welded steel tube - E - C
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