YUHONG HOLDING GROUP CO., LTD
| Product Name | Carbon Steel Heat Exchanger Tube |
| Length | Single Random, Double Random & Cut Length |
| Payment Terms | L/C,T/T |
| End | Plain End, Beveled End |
| Packaging Details | Ply-wooden Case /Iron Case/ Bundle with plastic Cap |
| Surface Condition | Oil, Black Painting |
| Standard Grade | JIS G3461 STB 340 |
| Thickness | BWG10-25 |
| High Light | JIS G3461 STB 340 Carbon Steel Seamless Tube, Heat Exchanger Tube |
| OD | 1/4" , 3/8", 1/2", 5/8", 3/4", 1", 1.1/4", etc. |
| Delivery Time | 7 DAYS |
| Place of Origin | CHINA |
| Model Number | JIS G3461 STB 340 Carbon Steel Heat Exchanger Tube |
| Brand Name | YUHONG |
| Certification | ABS, GL, DNV, NK, PED, AD2000, GOST9941-81, CCS, ISO 9001-2008 |
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Product Specification
| Product Name | Carbon Steel Heat Exchanger Tube | Length | Single Random, Double Random & Cut Length |
| Payment Terms | L/C,T/T | End | Plain End, Beveled End |
| Packaging Details | Ply-wooden Case /Iron Case/ Bundle with plastic Cap | Surface Condition | Oil, Black Painting |
| Standard Grade | JIS G3461 STB 340 | Thickness | BWG10-25 |
| High Light | JIS G3461 STB 340 Carbon Steel Seamless Tube, Heat Exchanger Tube | OD | 1/4" , 3/8", 1/2", 5/8", 3/4", 1", 1.1/4", etc. |
| Delivery Time | 7 DAYS | Place of Origin | CHINA |
| Model Number | JIS G3461 STB 340 Carbon Steel Heat Exchanger Tube | Brand Name | YUHONG |
| Certification | ABS, GL, DNV, NK, PED, AD2000, GOST9941-81, CCS, ISO 9001-2008 | ||
| High Light | JIS G3461 STB 340 carbon steel tube ，seamless steel heat exchanger tube ，low temperature boiler steel tube | ||
JIS G3461 STB 340 Carbon Steel Heat Exchanger Tube Low-Temperature Boiler Tube
A seamless carbon steel tube made to JIS G3461 grade STB 340, with minimum 340 MPa tensile strength, for heat transfer service in boilers and heat exchangers. The main advantage of STB 340 is that it delivers lowest life-cycle cost for applications where temperature is ≤400°C and fluids are not highly corrosive. This material used in economizers, firetubes, feedwater heaters, and LP evaporators. It combines strength, ductility, weldability, and availability at a price point that is hard to beat.
Equivalent Grades (Cross-reference)
| Standard | Grade | Notes |
| ASTM A179 (USA) | Low-carbon seamless cold-drawn for heat exchangers | Almost identical; A179 requires 180 MPa min yield (slightly higher than STB 340) |
| ASTM A214 (USA) | Low-carbon welded for heat exchangers | Welded version, not seamless |
| EN 10216-1 (Europe) | P235TR1 or P235TR2 | P235TR2 is closest (TS 360–480 MPa, YS ≥ 235 MPa) |
| GB 3087 (China) | 10# or 20# seamless boiler tube | 20# is stronger (TS ≥ 410 MPa) |
| DIN 17175 (Germany, obsolete) | St35.8 | Replaced by EN 10216-1 P235TR2 |
|
Most direct equivalent: ASTM A179 (same low carbon, same ductility, similar strength). STB 340 is often interchangeable with A179 for shell-and-tube heat exchangers. |
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| Standard | Grade | Chemical Composition Limits (%) | ||||
| C | Si | Mn | P | S | ||
| JIS G3461 | STB 340 | ≤ 0.18 | ≤ 0.3 | 0.30-0.60 | ≤ 0.035 | ≤ 0.035 |
Mechanical Properties of JIS G3461 STB 340 Carbon Steel Heat Exchanger Tube Seamless Steel Boiler Tube
| Grade | Tensile Property (N/mm2) | Yield Point or Yield Strength (N/mm2) | Rockwell hardness HRB | Elongation (%) | ||
| OD ≥20 mm | 10 mm ≤OD ＜20 mm | OD ＜10 mm | ||||
| Longitudinal | Transverse | Transverse | ||||
| STB 340 | ≥ 340 | ≥ 175 | 77 max. | ≥ 35 | ≥ 30 | ≥ 27 |
Comparison with STB 340 Carbon Steel Heat Exchanger Tube vs. STB 410 Carbon Steel Heat Exchanger Tube
| Grade | Tensile strength | Typical use | Cost |
| STB 340 | ≥ 340 (MPa) | Low/medium pressure, lower temperature (≤ 400°C): economizers, LP heat exchangers, firetubes | Lower |
| STB 410 | ≥ 410 (MPa) | Higher pressure/temperature (≤ 450°C): superheaters, high-pressure heat exchangers | Higher |
|
Rule of thumb: Use STB 340 for economizers, feedwater heaters, and general low-temperature boiler tubes. Use STB 410 for superheaters and high-temperature waterwall tubes where creep strength is needed. |
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Company Details
Business Type:
Manufacturer,Importer,Exporter,Trading Company,Seller,Other
Year Established:
1990
Total Annual:
50M-70M
Employee Number:
50~800
Ecer Certification：
Verified Supplier
Yuhong Holding Group has more than 35 years experience for pipeline products, till now we have 3 big joint venture factories, the total production area more than 130000 square meters, and more than 600 workers with 106 production lines give our clients excellent supporting always. &n... Yuhong Holding Group has more than 35 years experience for pipeline products, till now we have 3 big joint venture factories, the total production area more than 130000 square meters, and more than 600 workers with 106 production lines give our clients excellent supporting always. &n...
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