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 HOLDING GROUP is one of the largest Procurement, Engineering & Contracting Group companies in China. Our group branch company and factory have been already approved by : ABS, LR, DNV, GL, BV, CCS, KR, PED 97/23/EC, AD2000-WO, GOST9941-81, CCS, TS, CNNC, ISO9... YUHONG HOLDING GROUP is one of the largest Procurement, Engineering & Contracting Group companies in China. Our group branch company and factory have been already approved by : ABS, LR, DNV, GL, BV, CCS, KR, PED 97/23/EC, AD2000-WO, GOST9941-81, CCS, TS, CNNC, ISO9...
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