Monel 400 K400 Instrumentation tubes , Monel 400 K400 Instrumentation Tube Manufacturer,Monel 400 K400 Instrumentation Tube Supplier,Monel 400 K400 Instrumentation Tube Exporter, Monel 400 K400 Precision Tubing, Monel 400 K400 Small Diameter Tube ,Monel 400 K400 Instrumentation Tubes
Monel 400 / K400 instrumentation tubes are premium-grade tubing products made from a solid-solution alloy of approximately 67% nickel and 30% copper. This unique combination provides outstanding corrosion resistance and mechanical properties, making these tubes ideal for highly demanding environments. Monel 400 (also known by the trade name K400) is especially known for its resistance to a wide range of corrosive media, including seawater, hydrofluoric acid, and alkalis, even at high temperatures and pressures.
These instrumentation tubes are widely used in critical systems where precision, strength, and reliability are required. Common applications include hydraulic control systems, pneumatic instrumentation, pressure sensing lines, and chemical injection systems. Industries such as oil & gas, marine engineering, petrochemical processing, and power generation rely on Monel 400/K400 tubing to ensure consistent and safe operation in corrosive and high-stress conditions.
Monel 400 instrumentation tubing is available in seamless and welded forms, with precise dimensional tolerances and smooth internal surfaces to prevent contamination and maintain flow integrity. The tubes are typically produced in accordance with ASTM standards such as ASTM B165 and are available in various sizes ranging from 1/8" to 1" outer diameter. They are supplied in straight lengths or coils and are often bright annealed for improved surface finish and corrosion resistance.
One of the key benefits of using Monel K400 instrumentation tubes is their excellent resistance to chloride-induced stress corrosion cracking and their ability to maintain strength across a broad temperature range. This makes them especially suitable for offshore platforms and subsea systems where exposure to aggressive environments is constant. In addition, their non-magnetic properties make them suitable for use in sensitive electronic and instrumentation systems.
Specification of Monel 400 K400 Instrumentation tubes
| Property | Specification |
|---|---|
| Material | Monel 400 / K400 (UNS N04400) |
| Standards | ASTM B165 (Seamless), ASTM B725 (Welded), ASTM B730 (Welded & Annealed) |
| Chemical Composition | Ni: ≥ 63%, Cu: 28–34%, Fe: ≤ 2.5%, Mn: ≤ 2.0%, Si: ≤ 0.5%, C: ≤ 0.3% |
| Outer Diameter (OD) | 1/8" to 1" (3.18 mm to 25.4 mm) |
| Wall Thickness | 0.020" to 0.083" (0.5 mm to 2.1 mm) |
| Tube Lengths | Straight lengths (up to 6 meters) or coils (as per customer requirement) |
| Form | Seamless or Welded |
| Finish | Bright Annealed, Pickled, Polished |
| Tensile Strength | ≥ 550 MPa (80 ksi) |
| Yield Strength (0.2% Offset) | ≥ 240 MPa (35 ksi) |
| Elongation | ≥ 30% |
| Hardness | ≤ 85 HRB |
| Melting Range | 1300–1350 °C (2370–2460 °F) |
| Density | 8.8 g/cm³ |
| Temperature Range | -196°C to +550°C (-320°F to 1020°F) |
| Corrosion Resistance | Excellent in seawater, acids (HF, HCl), alkalis, and reducing environments |
| Magnetic Properties | Slightly magnetic at room temperature |
| Applications | Instrumentation lines, impulse lines, control systems, offshore & chemical plants |
Chemical Composition of Monel 400 K400 Instrumentation tubes
| Element | Percentage (%) |
|---|---|
| Nickel (Ni) | ≥ 63.0 |
| Copper (Cu) | 28.0 – 34.0 |
| Iron (Fe) | ≤ 2.50 |
| Manganese (Mn) | ≤ 2.00 |
| Carbon (C) | ≤ 0.30 |
| Silicon (Si) | ≤ 0.50 |
| Sulfur (S) | ≤ 0.024 |
In summary, Monel 400 / K400 instrumentation tubes combine the critical qualities of high strength, corrosion resistance, and reliability in a single material. Their robust performance in harsh environments, along with adherence to international quality standards, makes them a trusted choice for instrumentation and control applications worldwide. Whether used in upstream oil operations or chemical manufacturing plants, these tubes ensure long-term service with minimal maintenance and high operational efficiency.
Specification of Monel 400 K400 Instrumentation tubes
| Property | Specification |
|---|---|
| Material | Monel 400 / K400 (UNS N04400) |
| Standards | ASTM B165 (Seamless), ASTM B725 (Welded), ASTM B730 (Welded & Annealed) |
| Chemical Composition | Ni: ≥ 63%, Cu: 28–34%, Fe: ≤ 2.5%, Mn: ≤ 2.0%, Si: ≤ 0.5%, C: ≤ 0.3% |
| Outer Diameter (OD) | 1/8" to 1" (3.18 mm to 25.4 mm) |
| Wall Thickness | 0.020" to 0.083" (0.5 mm to 2.1 mm) |
| Tube Lengths | Straight lengths (up to 6 meters) or coils (as per customer requirement) |
| Form | Seamless or Welded |
| Finish | Bright Annealed, Pickled, Polished |
| Tensile Strength | ≥ 550 MPa (80 ksi) |
| Yield Strength (0.2% Offset) | ≥ 240 MPa (35 ksi) |
| Elongation | ≥ 30% |
| Hardness | ≤ 85 HRB |
| Melting Range | 1300–1350 °C (2370–2460 °F) |
| Density | 8.8 g/cm³ |
| Temperature Range | -196°C to +550°C (-320°F to 1020°F) |
| Corrosion Resistance | Excellent in seawater, acids (HF, HCl), alkalis, and reducing environments |
| Magnetic Properties | Slightly magnetic at room temperature |
| Applications | Instrumentation lines, impulse lines, control systems, offshore & chemical plants |
🏭 Industry & Application
- ✅ Monel 400 K400 Instrumentation tubes for Medical Industry
- ✅ Monel 400 K400 Instrumentation tubes for Chemical Processing
- ✅ Monel 400 K400 Instrumentation tubes for Instrumentation Lines
- ✅ Monel 400 K400 Instrumentation tubes for Gas & Liquid Flow
- ✅ Monel 400 K400 Instrumentation tubes for Heat Exchangers
❓ Frequently Asked Questions (FAQs)
Q1:What is Monel 400 (K400) instrumentation tubing used for?
Monel 400 instrumentation tubes are used in critical fluid and gas transmission systems for control and instrumentation applications, including impulse lines, pressure measurement, chemical injection, and hydraulic/pneumatic control systems. They are ideal for use in corrosive environments such as offshore platforms, chemical plants, and marine systems.
Q2:Is Monel 400 tubing weldable?
Yes, Monel 400 can be welded using common methods like GTAW (TIG) or GMAW (MIG), but proper cleaning and heat treatment may be required to maintain corrosion resistance.
Q3: How does Monel 400 compare to stainless steel tubing?
Monel 400 is far more resistant to corrosion in marine and acidic environments compared to stainless steels. However, it is more expensive. It's typically used when chloride stress corrosion cracking or strong acids are a concern.
Monel 400 K400 Instrumentation tubes exporter
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