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| الاسم التجاري: | YUHONG |
| رقم الطراز: | ASME SB165 مونيل 400 أنابيب غير ملحومة من سبائك النيكل |
| الـ MOQ: | 1000 كلغ |
| تفاصيل التعبئة: | علبة خشبية رقائقية / علبة حديدية / حزمة بغطاء بلاستيكي |
| شروط الدفع: | الاعتماد المستندي، تي/تي |
ASME SB165 / ASTM B165 UNS N04400 / Monel 400 Seamless Pipe Nickel Alloy Steel Heat Exchanger Tube
ASME SB165 UNS N04400 (Monel 400) seamless tube is a high-performance material for heat exchangers requiring exceptional resistance to seawater, hydrofluoric acid, and non‑oxidizing chemicals. Its combination of strength, ductility, thermal conductivity, and resistance to chloride stress corrosion cracking makes it a preferred choice in marine, chemical, and oil & gas industries where 316L or copper alloys would fail prematurely.
Key characteristics of B165 UNS N04400/Monel 400 seamless pipe and tube
High strength and toughness over a wide temperature range (cryogenic to ~1000°F / 538°C)
Excellent resistance to many corrosive media – especially seawater, hydrofluoric acid, and reducing acids
Solid-solution alloy (no age hardening) – good weldability and formability
Chemical Composition of ASME SB165 UNS N04400/Monel 400 Seamless Pipe Nickel Alloy Steel Heat Exchanger Tube
| Grade | C | Mn | Si | S | Cu | Fe | Ni |
| Monel 400 | 0.30 max | 2.00 max | 0.50 max | 0.24max | 28.0-34.0 | 2.50 max | 63.00 min |
Mechanical and Physical properties of ASME SB165 UNS N04400/Monel 400 Seamless Pipe Nickel Alloy Steel Heat Exchanger Tube
| Density | Melting Point |
Tensile Strength, min, psi (MPa) |
Yield Strength, min. (0.2%offset) min psi (MPa) |
Elongation in 2in. or 50mm, min % |
| 8.8 g/cm3 |
1350 °C (2460 °F) |
Annealed: 480MPa Stress-relieved: 585MPa |
Annealed: 195MPa (size under 5in.) 170MPa (size over 5in.) Stress-relieved: 380MPa |
Annealed:35% Stress-relieved:15% |
How It Works – Monel 400 Tube in a Shell & Tube Heat Exchanger
Basic function: Transfers heat between two fluids without mixing them.
Tube side fluid (corrosive, e.g., seawater, chemical solution) flows inside the Monel tube.
Shell side fluid (e.g., cooling water, steam, hydrocarbon) flows outside the tube bundle.
Monel 400 provides a corrosion-resistant barrier, preventing tube wall thinning, pitting, or cracking over years of service.
Application
Heat exchangers & condensers – Seawater cooling, chemical plants, refineries
Marine engineering – Shipboard coolers, offshore produced water coolers
Desalination plants – Brine heaters, evaporator tubes
Chemical processing – HF service, sulfuric acid alkylation, chlorinated solvent handling
Oil & gas – Sour service (with NACE limitations – H₂S requires careful evaluation)
Cryogenic equipment – Retains ductility down to liquid hydrogen temperatures (-253°C / -423°F)
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