JIS G3461 STB340 seamless steel pipe, STB340 steel pipe supplier
JIS G3461
Standard specifies the carbon steel tubes, hereinafter refered to as the tubes, used for
exchanger heat on the inside and outside of the tube, such as water tubes, smoke tubes, superheater tubes, air preheater tubes, etc.
JIS G3461 is the usages of the boiler, and heat exchanger tubes, condenser tubes, catalyst 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.
The JIS G3461 boiler tube Size (mm):
- Outer Dimensions: 19.05mm – 168.3mm
- Wall Thickness:2.0mm – 14 mm
- Length: max 19000mm
- Painting: as requested.
Application: used for exchanging heat on the inside and outside of the tube, such as water tubes, smoke tubes, superherater tubes,
air preheater tubes, etc. of boilers, and heat exchanger industries. it is not applicable to the steel tubes for heating furnace and those for heat exchangers for low temperature service.
The main products of steel / steel grade:
JIS G3461 tube Chemical Compositions(%)
| Grade |
C |
Si |
Mn |
P |
S |
Cr |
Mo |
| 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 tube Mechanical Properties
| Grade |
Yield Strength (Mpa) |
Tensile Strength (Mpa) |
Elongation (%) |
| STB340 |
≥175 |
≥340 |
≥35 |
| STB410 |
≥255 |
≥410 |
≥25 |
| STB510 |
≥295 |
≥510 |
≥25 |
Packing: Bare/bundles/crates/crate protection at the both sides of tubes or as per customers’ requirements .
Each tube haing passed the inspection shall be marked with the following items. However, the order of arranging the items is not specified. Further,
in the case of either smaller tubs or request from the purchaser, the tubes may be bundled together and marked for each bundle by a suitable means.
- Class symbol
- Letter symbol indication the manufacturing method
- Dimensions
- Manufacturer’s name or its abbreviation
- Letter symbolS indicating the designation of special quality requirements
