JIS G3460 Steel Pipes for low temperature service
- Model
- JIS G3460
Item specifics
- Type
- Hot Rolled / Cold Drawn
- Delivery Condition
- As Rolled, Cold Drawn, Normalizing Rolled
Review
Description
JIS G3460 Steel pipes for low temperature service
JIS G3460 Steel pipes used for piping at extremely low temperatures of freezing point or under
JIS G3460 Steel pipes Manufacturing method
The manufacturing method shall be as follows.
The pipes shall be manufactured from fine-grained killed steels. Pipes of STPL380 shall be seamless or electric resistance welded, and those of STPL450 and STPL690 shall be seamless.
JIS G3460 Steel pipes dimensional and tolerances
Outside diameter: 10.5-660.4mm
wall thickness: sch 10-160
dimensional and tolerances: +/-1% OD ; +/- 1.6mm WT
JIS G3460 Steel pipes Chemical composition
Symbol of grade | C | Si | Mn | P | S | Ni |
STPL380 | 0.25 max. | 0.35 max. | 1.35 max. | 0.035 max. | 0.035 max. | / |
STPL450 | 0.18 max. | 0.10 to 0.35 | 0.30 to 0.60 | 0.030 max. | 0.030 max. | 3.20 to 3.80 |
STPL690 | 0.13 max. | 0.10 to 0.35 | 0.90 max. | 0.030 max. | 0.030 max. | 8.50 to 9.50 |
JIS G3460 Steel pipes Mechanical properties
Symbol of grade | Tensile strength N/mm2 | Yield point or proof stress N/mm2 | Elongation % | |||
Tensile test piece and tensile test direction | ||||||
Test piece No. 11 or No. 12 | Test piece No. 5 | Test piece No. 4 | ||||
Parallel to pipe axis | Perpendicular to pipe axis | Parallel to pipe axis | Perpendicular to pipe axis | |||
STPL380 | 380 min. | 205 min. | 35 min. | 25 min. | 30 min. | 22 min. |
STPL450 | 450 min. | 245 min. | 30 min. | 20 min. | 24 min. | 16 min. |
STPL690 | 690 min. | 520 min. | 21 min. | 15 min. | 16 min. | 10 min. |
JIS G3460 Steel pipes Heat treatment
STPL380/STPL450 Normalizing, normalizing followed by tem pering, or quenching followed by tempering
STPL690 Normalizing twice followed by tempering, or quenching followed by tempering
JIS G3460 Steel pipes Appearance
Appearance shall be as follows.
a) The pipes shall be straight, and the both ends shall be perpendicular to the pipe axis for practical purposes.
b) Both the internal and external surfaces of pipes shall be smoothly finished and free from defects detrimental to use.
c) Pipes may be repaired by grinding or machining, provided that the wall thickness of the product after repairing satisfies the specified tolerances. Repair by weldingis not permitted.
d) The surface of the repaired part shall be smooth along the contour of the pipe.
e) The external surface of the part where a weld bead was removed shall be smooth along the contour of the pipe.
JIS G3460 Steel pipes Tests and Inspection
Chemical analysis
Mechanical tests
Tensile test
Flattening test
Bend test
Charpy impact test
Hydrostatic test
Non-destructive test
