JIS G3461 STB410 Boiler And Heat Exchanger Tubes
JIS G3461 STB410 Carbon Steel Tubes used for exchanging heat on the inside and outside of the tube, such aswater tubes, smoke tubes, superheater tubes, air preheater tubes, etc.
Description
JIS G3461 STB410 Boiler and Heat Exchanger Tubes Dimensional Range & Specification
Outside Diameter：12.9mm——127mm
Wall thickness：3.4mm——12.7mm
Length：6000mm、12000m or specified length as required.
JIS G3461 STB410 Carbon Steel Tubes for Boiler and Heat Exchanger
JIS G3461 STB410 Carbon Steel Tubes used for exchanging heat on the inside and outside of the tube, such aswater tubes, smoke tubes, superheater tubes, air preheater tubes, etc. of the boiler, and heat exchanger tubes, condenser tubes, catalyzer tubes, etc. used in chemical and petroleum industries.
However,JIS G3461 STB410 Carbon Steel Tubes are not applicable to the steel tubes for heating furnace and steel heat exchanger tubes for low temperature service.
Heat Treatment Of JIS G3461 STB410
| Grade | 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
|
|
| STB410 |
As manufactured. However, as required, low temperature annealing or normalizing may be performed.
|
Low temperature
annealing, normalizing
or full annealing.
|
Normalizing | Low temperature annealing | Normalizing |
Note:The cold finished electric resistance welded steel tube which has been normalized prior to cold finishing may be finished by annealing.
Chemical Composition Of JIS G3461 STB410
| Standard | Grade | Chemical Composition Limits (%) | ||||
| C | Si | Mn | P | S | ||
| JIS G3461 | STB410 | ≤ 0.32 | ≤ 0.35 | 0.30-0.80 | ≤ 0.035 | ≤ 0.035 |
Note:Where required by the purchaser, Si may be designated as 0.10 to 0.35%.
Mechanical Properties Of JIS G3461 STB410
| 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 | |||
| STB410 | ≥ 410 | ≥ 255 | ≥ 25 | ≥ 20 | ≥ 17 |
Note:
1. The above table is only applicable for heat exchanger carbon steel tubes. The buyer can appoint the upper limit value of tensile strength. The upper limit value of tensile strength is the above shown value plus 120 N/mm2.
2. For the carbon steel pipes 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 Z8401 (a rounding method).
Dimensional Tolerances Of JIS G3461
(1) The tolerances on the 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
To the tolerances on the outside diameter of the electric resistance welded steel tube other than cold finished, the tolerances for the cold finished steel tube may be applied, as required by the purchaser.
(2) The Tolerances on the wall thickness and on the thickness disparity
| 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 term “thickness disparity” means the ratio of the difference between the maximum and the minimum of the measured wall thickness in the same section to the ordered wall thickness and this is not applicable to the tube under 5.6mm in wall thickness.
Testing:
Chemical Analysis , Tensile Test , Flattening Test , Flaring Test , Reverse flattening Test ,Hydrostatic Test or Nondestructive Examination.