Yuhong Group Co.,Ltd
| Payment Terms | T/T, L/C |
| Supply Ability | 1500 tons per month |
| Delivery Time | According to the quantity |
| Packaging Details | Ply-wooden Case with plastic Cap or Woven Bag |
| Material | N08800, N08810, N08811, N08825 |
| NDT | Eddy Current Test, Hydrostatic Test, UT, IGC, Grain Size Test , ... |
| Type | Straight , U bend , Snake Bend, Coil form |
| Surface | Bright annealed, Polished, Pickled |
| End Type | Bevled End, Plain End, Thread End |
| Inspection | The third party is acceptable |
| Brand Name | YUHONG |
| Model Number | Steel Seamless Tube |
| Certification | ABS, GL, DNV, NK, PED, AD2000, GOST9941-81, CCS, ISO 9001-2008 |
| Place of Origin | China |
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Product Specification
| Payment Terms | T/T, L/C | Supply Ability | 1500 tons per month |
| Delivery Time | According to the quantity | Packaging Details | Ply-wooden Case with plastic Cap or Woven Bag |
| Material | N08800, N08810, N08811, N08825 | NDT | Eddy Current Test, Hydrostatic Test, UT, IGC, Grain Size Test , ... |
| Type | Straight , U bend , Snake Bend, Coil form | Surface | Bright annealed, Polished, Pickled |
| End Type | Bevled End, Plain End, Thread End | Inspection | The third party is acceptable |
| Brand Name | YUHONG | Model Number | Steel Seamless Tube |
| Certification | ABS, GL, DNV, NK, PED, AD2000, GOST9941-81, CCS, ISO 9001-2008 | Place of Origin | China |
| High Light | Plain End Seamless Tube ，Furnace Seamless Tube | ||
ASTM A407 N08810 Heat Exchanger Tube Chemical Composition
| UNS Designation | Ni | Cu | Iron | Mn | C | Cr | Ti | Al |
| N08810 | 0.30–0.35 | 0.75 | 39.5 | 1.5 | 0.05–0.10 | 19.0-23.0 | 0.15-0.60 | 0.15-0.60 |
ASTM B407 N08810 Heat Exchanger Tube Application
Tubes are used in extreme environments:
| Application | Primary Challenge | 800H’s Advantage |
| Ethylene cracking | Carburization + creep | Controlled carbon + Ni/Cr matrix stability |
| Nuclear steam gens | SCC in chlorides | >30% Ni content prevents cracking |
| Reformer tubes | Hydrogen embrittlement | Stable austenitic structure |
| Radiant furnace tubes | Cyclic oxidation/carburizing | Al/Ti oxide layer formation |
ASTM B407 N08810 Heat Exchanger Tube Strength & Mechanical Properties
Tensile Strength: ≥500 MPa (72.5 ksi)
Yield Strength (0.2% offset): ≥170 MPa (25 ksi)
Elongation: ≥30%
Tensile Strength: ~380 MPa (55 ksi)
Creep Rupture Strength: Excellent (e.g., 10,000 hrs at 815°C: ~20 MPa)
ASTM B407 N08810 Heat Exchanger Tube FAQ
1. What distinguishes Incoloy 800H from standard Incoloy 800?
800H has a higher carbon content (0.05–0.10% vs. 0.03% max in 800) for superior creep resistance at >600°C.
It undergoes solution annealing at ≥1100°C to achieve an ASTM No. 5 or coarser grain size, optimizing high-temperature strength.
2. What temperatures can Incoloy 800H tubes handle?
Continuous Service: Up to 815°C (1500°F).
Short-Term Exposure: Up to 950°C (1740°F).
Critical Note: For >900°C, Incoloy 800HT (Ti/Al-controlled) is preferred for enhanced stability.
3. Is welding 800H tubes difficult?
Weldable via:
TIG/GTAW with ERNiCr-3 (FM 82) filler.
SMAW with ENiCrFe-3 electrodes.
Post-Weld Requirement: Solution annealing (1100–1175°C) is essential to restore corrosion/creep resistance.
Company Details
Business Type:
Manufacturer,Distributor/Wholesaler,Importer,Exporter,Trading Company,Seller,Other
Year Established:
2007
Total Annual:
50M-70M
Employee Number:
50~850
Ecer Certification：
Verified Supplier
Yuhong Group is one of the large scale group company in China, more than 35 years experience in the international market, providing high-quality services to over 3000 customers, end user which like Aramco, Petrobras, Pemex, Petronas, Ecopetro, Petroecuador, …. till now Yuhong Grou... Yuhong Group is one of the large scale group company in China, more than 35 years experience in the international market, providing high-quality services to over 3000 customers, end user which like Aramco, Petrobras, Pemex, Petronas, Ecopetro, Petroecuador, …. till now Yuhong Grou...
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