JIS G3461 STB510 Seamless Steel Tubes
JIS G3461 STB510 Carbon Steel Tubes for Boiler and Heat Exchanger.STB510 is a steel grade of JIS G3461 Standard Specification,This Japanese Industrial Standard specifies the carbon steel tubes.

Description

JIS G3461 STB510 Carbon Steel Tubes
JIS G3461 STB510 Carbon Steel Tubes for Boiler and Heat Exchanger
JIS G3461 STB510 Carbon Steel Tubes for Boiler and Heat Exchanger Quick Details
Company Name: Beite steel pipe
JIS G3461 STB510 Carbon Steel Tubes Dimensional Range & Specification
Outside Diameter：15.9mm——127mm
Wall thickness：3.4mm——16mm
Length：6000mm、12000m or specified length as required.
JIS G3461 STB510 Carbon Steel Tubes for Boiler and Heat Exchanger
STB510 is a steel grade of JIS G3461 Standard Specification,This Japanese Industrial Standard specifies the carbon steel tubes.
JIS G3461 STB510 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, it is not applicable to the steel tubes for heating furnace and steel heat exchanger tubes for low temperature service.
Heat Treatment Of JIS G3461 STB510
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
STB510 Normalizing Normalizing
Chemical Composition Of JIS G3461 STB510
Standard Grade Chemical Composition Limits (%)
C Si Mn P S
JIS G3461 STB510 ≤ 0.25 ≤ 0.35 1.00-1.50 ≤ 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 STB510

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
STB510 ≥ 510 ≥ 295 ≥ 25 ≥ 20 ≥ 17
Quality Control Of JIS G3461 STB510
Testing:
Chemical Analysis  , Tensile Test ,  Flattening Test  , Flaring Test  , Reverse flattening Test  ,Hydrostatic Test or Nondestructive Examination.
Appearance of JIS G3461 STB510 Carbon Steel Tubes
(1) The tube shall be practically straight and its both ends shall be at right angles to its axis.

(2) The inside and outside surfaces of the tube shall be well-finished and free from defects injurious to use. However, in the case of electric resistance welded tube the swelling of inside surface of the weld shall be 0.25mm or less. In this case, if necessary, the purchaser may specify the inside swelling as 0.5mm or less for the tubes 50.8mm or under in outside diameter and at the same time 3.5mm or under in wall thickness.

Dimensional Tolerances Of JIS G3461 STB510
(1) The tolerances on the outside diameter
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: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.

(3) The tolerances on the length

Division Tolerance on length
50 mm or under in
outside diameter
 7 m or under in length +0.7 mm
0
Over 7 m in length
Add 3 mm to the plus side permissible deviation given above for each increase of 3m or its fraction in length. However, the maximum value shall be 15 mm.
Over  50  mm  in
outside diameter
 7 m or under in length +10mm
0
Over 7 m in length
Add 3 mm to the plus side permissible deviation given above for each increase of 3m or its fraction in length. However, the maximum value shall be 15mm.

Note:When an accurate length is particularly required, the tolerances shall be agreed upon by the purchaser and the manufacturer.

W=0.02466 t (D-t)
Where
W: unit mass of tube (Kg/m)
t: wall thickness of tube (mm)
D: outside diameter of tube (mm)

JIS G3461 STB510 Equivalent steel grade

JIS G3461 DIN DNV
STB 510 17175 19Mn 5 Sec 4-E-TS510