Section 1: Product Overview
Monel seamless pipe and tube are copper-nickel alloys with exceptional resistance to seawater and various corrosive media. Our Monel seamless tubing meets ASTM B165 and ASME SB-165 standards, making it the preferred choice for marine, offshore, chemical processing, and oil refinery applications.
As a leading Monel pipe manufacturer, we provide Monel 400, K-500, and 404 grades in seamless pipe and tube form.
Section 2: Key Features
- Excellent resistance to seawater and brine solutions
- Good corrosion resistance to acids and alkalis
- High strength with good ductility
- Resistant to stress corrosion cracking
- Non-magnetic in all conditions
- ASTM B165 certified manufacturing process
- Complete material test reports (MTR) provided
Section 3: Available Grades Overview
| Grade | UNS No. | Key Feature | Main Applications |
|---|---|---|---|
| Monel 400 | N04400 | Seawater resistant | Seawater pumps, valves, marine hardware |
| Monel K-500 | N05500 | Precipitation hardening | Shafts, fasteners, pump impellers |
| Monel 404 | N04404 | Deep draw | Precision instruments, jewelry |
Section 4: Chemical Composition (All Grades)
| Element | 400 | K-500 | 404 |
|---|---|---|---|
| Ni (Nickel) | ≥63.0 | ≥63.0 | 44.0-50.0 |
| Cu (Copper) | 28.0-34.0 | 27.0-34.0 | 44.0-50.0 |
| Fe (Iron) | ≤2.5 | ≤2.0 | ≤0.5 |
| Mn (Manganese) | ≤2.0 | ≤1.5 | ≤0.5 |
| Si (Silicon) | ≤0.5 | ≤0.5 | ≤0.2 |
| C (Carbon) | ≤0.30 | ≤0.25 | ≤0.15 |
| S (Sulfur) | ≤0.024 | ≤0.01 | ≤0.02 |
| Al (Aluminum) | – | 2.0-3.5 | – |
| Ti (Titanium) | – | 0.35-0.85 | 0.5-2.0 |
Section 5: Mechanical Properties (All Grades – Annealed)
| Property | 400 | K-500 | 404 |
|---|---|---|---|
| Tensile Strength | ≥515 MPa | ≥896 MPa | ≥450 MPa |
| Yield Strength | ≥195 MPa | ≥655 MPa | ≥195 MPa |
| Elongation | ≥35% | ≥20% | ≥25% |
| Hardness | ≤95 HRB | – | ≤95 HRB |
| Density | 8.80 g/cm³ | 8.45 g/cm³ | 8.80 g/cm³ |
Section 6: Specifications & Dimensions
Applicable Standards
| Standard | Description |
|---|---|
| ASTM B165 | Seamless Pipe & Tube |
| ASME SB-165 | ASME Standard |
| AMS 4574 | Aerospace – Seamless Tube |
| AMS 4575 | Aerospace – Bar |
Size Range
| Parameter | Range |
|---|---|
| Outside Diameter | 1/4″ (6.35mm) – 8″ (219.1mm) |
| Wall Thickness | 0.035″ (0.89mm) – 0.375″ (9.52mm) |
| Schedules Available | 5s, 10s, 40s, 80s, 160, XXH |
| Length | Random / Fixed 6m, 12m, or as required |
Section 7: Applications by Grade
| Grade | Recommended Applications |
|---|---|
| 400 | Seawater pumps and valves, marine hardware, chemical containers, oil refinery equipment, steam generators, heat exchangers, piping for brackish water |
| K-500 | Propeller shafts, fasteners, pump impellers, aircraft components, oil well logging tools |
| 404 | Precision instruments, jewelry components, deep draw applications, electronic parts |
Section 8: Corrosion Resistance Comparison
| Grade | Seawater | Acids | Alkalis | Stress Corrosion |
|---|---|---|---|---|
| 400 | Excellent | Good | Excellent | Good |
| K-500 | Excellent | Good | Excellent | Good |
| 404 | Excellent | Good | Excellent | Good |
Section 9: Why Choose Us
- ISO 9001:2015 certified manufacturer
- Mill test certificates provided with every order
- Competitive pricing direct from factory
- Quick lead times – typically 2-4 weeks
- Global shipping – worldwide logistics support
- Technical support – free material selection guidance
Section 10: FAQ
Q: What is the main advantage of Monel 400? A: Monel 400 offers excellent resistance to seawater and brine, making it ideal for marine applications.
Q: What is the difference between Monel 400 and K-500? A: Monel K-500 contains aluminum and titanium, allowing for precipitation hardening and achieving significantly higher strength.
Q: Is Monel suitable for saltwater applications? A: Yes, Monel is one of the best materials for seawater and saltwater environments.
Q: Can Monel K-500 be welded? A: Yes, but it requires post-weld heat treatment to restore optimal properties.
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