Monel 400 (UNS N04400) is a solid-solution nickel-copper alloy (Ni ≥ 63%, Cu 28–34%) with excellent resistance to seawater, hydrofluoric acid, sulphuric acid and alkalis, plus higher strength than pure nickel. It is a classic material for marine engineering, pump shafts and valves.
Shanghai Hangbo Alloy Group Co., Ltd. supplies Monel 400 Seamless Tube & Pipe to ASTM B165 seamless tube — Pierced then cold-rolled / cold-drawn seamless tubing to ASTM B444, B622, B163, B165 and B861 — 100% hydrostatic or eddy-current tested for high-pressure, high-temperature and corrosive service. All material ships with EN 10204 3.1 certified mill test reports.
Sizes & Specifications
| Item | Specification |
|---|---|
| Outside diameter | φ6 – 630 mm |
| Wall thickness | 0.5 – 40 mm |
| Length | ≤ 18 m / custom lengths on request |
| NDT inspection | ET / UT / Hydrostatic 100% |
| Common standards | ASTM B444, B622, B163, B165, B861, B338 |
Monel 400 Chemical Composition (wt%)
| Element | Content (wt%) | Element | Content (wt%) |
|---|---|---|---|
| Ni (镍) | ≥ 63.0 | C (碳) | ≤ 0.30 |
| Cu (铜) | 28.0–34.0 | Si (硅) | ≤ 0.50 |
| Fe (铁) | ≤ 2.5 | S (硫) | ≤ 0.024 |
| Mn (锰) | ≤ 2.00 |
Monel 400 Mechanical Properties
| Property | Value |
|---|---|
| Tensile strength (Rm) | ≥ 480 MPa |
| Yield strength (Rp0.2) | ≥ 195 MPa |
| Elongation (A) | ≥ 35 % |
| Hardness | ≤ 170 HB |
| Density | 8.80 g/cm³ |
| Melting range | 1300–1350 °C |
| Thermal conductivity | 21.8 W/m·K |
| Young's modulus | 179 GPa |
| Max service temperature | 600 °C |
Typical Applications
- Marine and desalination piping, pump shafts and propellers
- HF acid production, storage and transfer equipment
- Crude distillation overhead condensing systems
- Valves, pump bodies and fasteners
- Musical instrument strings and architectural roofing
Why Buy from Hangbo Alloy?
- Factory-direct manufacturer — founded 2012, headquartered in Shanghai Songjiang
- Cut-to-size service — bars cut to length, plates flame/plasma/laser-cut, tubes cut and bevelled to drawing
- Certified quality — ISO 9001:2015, GB/T 19001-2016, GJB 9001C-2017, EN 10204 3.1 certificates
- Complete mill documentation — chemical analysis, mechanical test, UT, hardness and grain-size reports with every shipment
Contact Us — Shanghai Hangbo Alloy Group Co., Ltd.
Shanghai Hangbo Alloy Group Co., Ltd.
📍 4F, Building 22, No. 85 Mingnan Road, Songjiang District, Shanghai 201613, China
📞 Tel / WhatsApp: +86 15618279078
✉️ Email: demi@nickel-alloy.com
🕒 Available 24 hours a day, 7 days a week — enquiries answered around the clock.
Send your drawing or enquiry (grade, form, size, quantity, standard) for a same-day quotation.
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Frequently asked questions
What is the MOQ and lead time?
MOQ is flexible — trial orders from a single piece or single plate are welcome. Stock sizes ship in 3–7 days; custom-cut, forged or machined items typically 15–35 days.
Can you provide third-party inspection and shipping to my port?
Yes. SGS / BV / TUV or your nominated inspector can witness all tests before shipment. Full export documentation, sea or air freight on FOB, CIF or DDP terms.
Do you supply machining to drawing?
Yes — CNC turning, milling, drilling, grinding and wire-cut from raw material to finished part in one factory, fewer hand-offs and less material waste.