JIS G3461 Carbon Steel Tubes for Boiler and Heat Exchanger
JIS G3461 specifies carbon steel pipes used to transfer heat inside and outside the pipe, such as boiler water pipes, smoke pipes, superheaters, air preheaters, etc. This Standard specifies tubes used for exchangers, condenser tubes, catalyst tubes, etc. However, this does not apply to steel pipes for heating furnaces and steel pipes for low-temperature heat exchangers. This standard normally applies to pipes with an outside diameter between 15,9 mm and 139,8 mm.
JIS G3461 boiler tube Size (mm):
Outer Dimensions: 15.9mm – 139.8mm
Wall Thickness: 2.0mm – 14 mm
Length: max 19000mm
Grades: STB340 (STB35), STB410 (STB42),STB510 (STB52)
JIS G3461 Chemical composition
|
Standard |
Grades |
Chemical composition |
||||
|
C |
Si |
Mn |
P |
S |
||
|
JIS G3461 |
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 |
|
JIS G3461 mechanical properties
| Standard |
Grades |
Tensile strength (MPa) |
Tensile strength (MPa) |
Elongation (%) |
|
JIS G3461 |
STB340 |
≥340 |
≥175 |
≥35 |
|
STB410 |
≥410 |
≥255 |
≥25 |
|
|
STB510 |
≥510 |
≥295 |
≥25 |
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