JIS G3467 Boiler Tube Specifications
JIS G3467 is a Japanese industrial standard that mainly regulates alloy steel seamless tubes for boilers and heat exchangers. Here are some of the main specifications for JIS G3467 boiler tubes:
1. Surface quality
The surface of the tube should be free of obvious defects, such as cracks, creases, pits, etc., and the surface needs to be properly treated for corrosion.
2. Heat treatment
JIS G3467 stipulates that the tube needs to be properly heat treated, such as normalizing, tempering, etc., to ensure that the material has good mechanical properties and service life.
Chemical composition requirements:
Grade | C | Mn | Si | P | S | Cr | Mo |
STBA 12 | 0.15 | 0.3 | 0.5 | 0.03 | 0.03 | 1 | 0.5 |
STBA 13 | 0.2 | 0.45 | 0.6 | 0.03 | 0.03 | 1.25 | 0.6 |
Reference size table:
Outside diameter（mm） | Wall thickness（mm） | Minimum tensile strength（MPa） | Minimum yield strength（MPa） | Elongation（%） |
25.4 | 2.6 | 415 | 205 | 20 |
38.1 | 3.2 | 485 | 250 | 22 |
50.8 | 4 | 520 | 275 | 24 |
Marking and packaging
Marking: Each tube should have a clear mark indicating the standard number, steel grade, specification and other information.
Packaging: The packaging should meet customer requirements to ensure that it is not damaged during transportation and storage.
