YUHONG HOLDING GROUP CO., LTD
| Payment Terms | TT, LC |
| Packaging Details | Ply-wooden Case /Iron Case/ Bundle with plastic Cap |
| Product Name | Heat Exchanger Tube |
| Standard | ASTM B444, ASME SB444 |
| Material | UNS N06625, INCONEL 625, DIN 2.4856 |
| OD | 1/4" , 3/8", 1/2", 5/8", 3/4", 1", 1.1/4", etc. |
| WT | BWG 25, 22, 20, 18 ... 10 |
| Length | Fixed length, Random length |
| Application | Heat Exchanger, Cooling , Heating, Condenser, Tube Bundle |
| High Light | ASTM B444 UNS N06625 Nickel Alloy Steel Heat Exchanger Tube, Alloy 625 Seamless Tube |
| Brand Name | Yuhong |
| Model Number | ASTM B444 UNS N06625 Nickel Alloy Seamless Tube |
| Certification | ABS, BV, DNV, CCS, LR |
| Place of Origin | China |
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Product Specification
| Payment Terms | TT, LC | Packaging Details | Ply-wooden Case /Iron Case/ Bundle with plastic Cap |
| Product Name | Heat Exchanger Tube | Standard | ASTM B444, ASME SB444 |
| Material | UNS N06625, INCONEL 625, DIN 2.4856 | OD | 1/4" , 3/8", 1/2", 5/8", 3/4", 1", 1.1/4", etc. |
| WT | BWG 25, 22, 20, 18 ... 10 | Length | Fixed length, Random length |
| Application | Heat Exchanger, Cooling , Heating, Condenser, Tube Bundle | High Light | ASTM B444 UNS N06625 Nickel Alloy Steel Heat Exchanger Tube, Alloy 625 Seamless Tube |
| Brand Name | Yuhong | Model Number | ASTM B444 UNS N06625 Nickel Alloy Seamless Tube |
| Certification | ABS, BV, DNV, CCS, LR | Place of Origin | China |
| High Light | ASTM B444 Nickel Alloy 625 tube ，UNS N06625 seamless heat exchanger tube ，Nickel Alloy Steel Seamless Tube | ||
ASTM B444 UNS N06625 Grade 1 Nickel Alloy Steel Seamless Tube Alloy 625 Heat Exchanger Tube
ASTM B444 UNS N06625 (Alloy 625) Seamless Heat Exchanger Tube is a weld‑free, nickel‑chromium‑molybdenum‑columbium tube manufactured and tested to the ASTM B444 standard. It is specifically designed for heat exchanger service, offering outstanding corrosion resistance (especially in seawater/acids), high strength, and thermal stability. The term excludes “steel” – it is a nickel superalloy, not a steel product.
The key advantages of ASTM B444 UNS N06625 (Alloy 625) seamless heat exchanger tubes, explained simply:
Outstanding corrosion resistance – Handles seawater, acids, and chlorides without rusting or pitting.
High strength – Stronger than stainless steel, even at high temperatures (up to ~650°C / 1200°F).
No weld seams – Seamless construction means no weak points or weld-related corrosion.
Resists stress cracking – Won't crack from chloride stress corrosion (a common problem with 300-series stainless steel).
Easy to fabricate – Can be bent, rolled, expanded into tube sheets, and welded without special difficulty.
Equivalent Grade of ASTM B444 UNS N06625 Nickel Alloy Steel Heat Exchanger Tube
| Grade | UNS No | Old British | Euronorm | GOST | Japanese JIS | ||
| BS | En | No | AFNOR | ||||
| Inconel 625 | N06625 | NA 21 | NiCr22Mo9Nb | 2.4856 | NC22DNB4M | ХН75МБТЮ | NCF 625 |
Chemical Composition of ASTM B444 UNS N06625 Nickel Alloy Steel Heat Exchanger Tube
| Grade | C | Mn | Si | Fe | S | Cr2 | Al-Ti | Ni | |
| 625 | min. | – | – | – | – | – | 20.0 | – | 58.0 |
| max. | 0.10 | 0.50 | 0.50 | 5.0 | 0.015 | 23.0 | 0.40 | – | |
Mechanical Properties of ASTM B444 UNS N06625 Nickel Alloy Steel Heat Exchanger Tube
| Grade | Tensile Strength (MPa) min | Yield Strength 0.2% Proof (MPa) min | Elongation (% in 50mm) min | Hardness | |
| Rockwell B (HR B) max | Brinell (HB) max | ||||
| 625 | Psi – 1,35,000 , MPa -930 | Psi – 75,000 , MPa – 517 | 42.5 | – | – |
Application:
1. Offshore Oil & Gas Platforms
2. Chemical & Petrochemical Processing
3. Marine & Desalination
4. Power Generation
5. High-Temperature Heat Exchangers (Up to ~650°C / 1200°F)
6. Pollution Control & Scrubbers
7. Specialty & Corrosive Acid Production
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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