Monel 400 (UNS N04400) Seamless Nickel-Copper Pipes
63% Nickel and 30% Copper solid-solution alloy engineered for offshore seawater piping and chemical alkylation units.
ASTM B165 / ASME SB165 UNS N04400 (Alloy 400) Pipe
Starlight Tubes manufactures premium Monel 400 (UNS N04400 / DIN 2.4360) seamless and welded pipes for marine engineering and corrosive chemical environments. Offering excellent toughness over a wide temperature range from sub-zero to 550°C, Monel 400 provides high resistance to cavitation, erosion, and stress corrosion in chloride-bearing media.
Our Monel 400 pipes are manufactured in annealed or stress-relieved conditions per ASTM B165 and NACE MR0175. Each pipe undergoes 100% PMI verification, hydrostatic pressure testing, and ultrasonic examination.
Technical Specifications
ASTM / ASME CompliantTechnical Specifications — Monel 400 (UNS N04400)
Certified chemical limits and mechanical tensile properties for ASTM B165 Monel 400
| Grade | Ni (min) | Cu | Fe (max) | Mn (max) | C (max) | Si (max) | S (max) |
|---|---|---|---|---|---|---|---|
| Monel 400 | 63.0 | 28.0-34.0 | 2.50 | 2.00 | 0.30 | 0.50 | 0.024 |
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Direct Mill Supply for Monel 400 Pipes
Starlight Tubes supplies fully certified Monel 400 pipes with complete metallurgical traceability, PMI verification, and export packaging.
Frequently Asked Questions on Monel 400 (UNS N04400) Pipes
Key engineering, tolerance, and international compliance answers from our metallurgical quality desk.
Monel 400 is widely used in marine piping, seawater desalination, oil refinery HF (hydrofluoric acid) alkylation units, chlorinated hydrocarbon synthesis, and brine heaters.
Request Project Quotation for Monel 400 (UNS N04400) Pipes
Submit your required sizes, wall thicknesses, material grades, and total tonnage. Our technical sales engineers respond with complete mill pricing and lead times within 24 hours.