Monel 400 MSS SP-83 Forged Threaded Union
✅ Monel 400 MSS SP-83 Forged Threaded Union – 3000# / 6000#
SSM supplies high-quality Monel 400 forged threaded unions manufactured according to MSS SP-83 standards. Rated for 3000# and 6000# pressure, these unions are designed to provide leak-proof, reliable connections in corrosive and high-pressure piping systems.
Made from Monel 400, a nickel-copper alloy known for its excellent corrosion resistance in seawater, chemical, and acidic environments, these unions are ideal for marine, chemical, oil & gas, and industrial applications where durability and chemical resistance are critical.
✅ Key Features
Standard: MSS SP-83
Material: Monel 400 (Nickel-Copper Alloy)
Pressure Rating: 3000# / 6000#
Connection Type: NPT Threaded
Type: Forged Pipe Union
Size Range: 1/2" – 3" (custom sizes available)
Finish: Machined / Pickled / Polished
🧪 Chemical Composition (Typical Range)
| Element | Content | Notes |
|---|---|---|
| Ni (Nickel) | ≥ 63 % | Base element |
| Cu (Copper) | 28–34 % | Balancing element |
| Fe (Iron) | ≤ 2.5 % | Minor strengthening element |
| Mn (Manganese) | ≤ 2.0 % | Minor alloying |
| Si (Silicon) | ≤ 0.5 % | Impurity limit |
| C (Carbon) | ≤ 0.3 % | Controls carbide formation |
| S (Sulfur) | ≤ 0.024 % | Controls sulfide formation |
⚙️ Mechanical Properties (Annealed Condition)
| Property | Value | Unit | Notes |
|---|---|---|---|
| Ultimate Tensile Strength | ~550 | MPa | Annealed |
| Yield Strength (0.2% offset) | ~240 | MPa | Annealed |
| Elongation | ~48 | % | Annealed |
| Modulus of Elasticity | ~179 | GPa | Room temperature |
| Density | ~8.8 | g/cm³ | - |
| Linear Expansion | ~13.9 | µm/m·°C | 20–100 °C |
| Melting Range | 1300–1350 | °C | - |
Note: Strength can be increased by cold working, but ductility may decrease.
✅ Advantages
Superior corrosion resistance in seawater, acids, and chemical media
High-strength forged construction for high-pressure service
Threaded design allows easy installation and disassembly
Reliable sealing for critical piping systems
Compatible with standard Monel 400 piping components
✅ Applications
Marine and offshore pipelines
Chemical processing plants
Oil & gas and petrochemical systems
Seawater desalination and treatment plants
High-pressure industrial piping systems
✅ Why Choose SSM
30+ years of experience in nickel alloy and Monel fittings
Full material traceability and certification (MTC / EN10204)
Compliance with MSS SP-83 and international standards
Large stock for fast delivery worldwide
OEM/custom sizes and specifications available
📩 Request a Quote
SSM can supply Monel 400 MSS SP-83 forged threaded unions (3000# / 6000#) in all standard sizes. Contact us today for pricing, technical datasheets, and global shipping.
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