Section 1: Product Overview
Monel flanges are copper-nickel alloy flanges with exceptional resistance to seawater and various corrosive media. Our Monel flanges meet ASTM B564, ASTM B366, and ASME B16.5 standards, making them the preferred choice for marine, offshore, chemical processing, and oil refinery applications.
As a leading Monel flange manufacturer, we provide Monel 400 and K-500 grades in various flange types.
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 B564/B366 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, marine |
| Monel K-500 | N05500 | Precipitation hardening | High strength applications |
Section 4: Chemical Composition (All Grades)
| Element | 400 | K-500 |
|---|
| Ni (Nickel) | ≥63.0 | ≥63.0 |
| Cu (Copper) | 28.0-34.0 | 27.0-34.0 |
| Fe (Iron) | ≤2.5 | ≤2.0 |
| Mn (Manganese) | ≤2.0 | ≤1.5 |
| Si (Silicon) | ≤0.5 | ≤0.5 |
| C (Carbon) | ≤0.30 | ≤0.25 |
| Al (Aluminum) | – | 2.0-3.5 |
| Ti (Titanium) | – | 0.35-0.85 |
Section 5: Mechanical Properties (All Grades)
| Property | 400 | K-500 |
|---|
| Tensile Strength | ≥515 MPa | ≥896 MPa |
| Yield Strength | ≥195 MPa | ≥655 MPa |
| Elongation | ≥35% | ≥20% |
| Hardness | 95 HRB max | – |
Section 6: Flange Types & Specifications
Available Flange Types
| Type | Description | Pressure Class |
|---|
| Weld Neck (WN) | Long radius neck, butt weld | ASME CL150-2500 |
| Slip-On (SO) | Slip over pipe | ASME CL150-1500 |
| Blind (BL) | Blank flange, no bore | ASME CL150-2500 |
| Threaded (TH) | Threads, no welding | ASME CL150-1500 |
Size Range
| Parameter | Range |
|---|
| Diameter | 1/2″ (DN15) – 24″ (DN600) |
| Pressure | ASME Class 150, 300, 600, 900, 1500, 2500 |
Section 7: Applications by Grade
| Grade | Recommended Applications |
|---|
| 400 | Seawater pumps, marine hardware, chemical containers, oil refinery |
| K-500 | Propeller shafts, high-strength fasteners, aerospace components |
Section 8: Why Choose Us
- ISO 9001:2015 certified manufacturer
- Mill test certificates provided
- Competitive pricing direct from factory
- Quick lead times – typically 1-3 weeks
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