Monel K-500 Pipe & Tube
Product Forms
Monel K-500 (UNS N05500) is available in multiple product forms covering high-strength piping systems, precision tubing, and offshore engineering applications.
Seamless Pipe
Type: Seamless
Standard: ASTM B165
High-strength piping for offshore platforms, seawater systems, and oil & gas transmission lines.
Welded Pipe
Type: Welded (ERW / EFW)
Standard: ASTM B725
Used in non-critical process piping, structural systems, and large-diameter installations.
Seamless Tube
Type: Seamless
Standard: ASTM B163 / B829
Heat exchangers, condensers, and high-pressure marine systems.
Welded Tube
Type: Welded (TIG / ERW)
Standard: ASTM B730
General service tubing for industrial fluid transfer and utility systems.
U-Bent Tube
Type: Seamless
Standard: ASTM B163
Shell-and-tube heat exchangers in power plants and desalination systems.
Instrumentation & Coiled Tube
Type: Seamless
Standard: ASTM B163 / B829
Hydraulic control lines, chemical injection systems, and offshore instrumentation.
Chemical Composition & Corrosion Resistance
Monel K-500 (UNS N05500) is a precipitation-hardened nickel-copper alloy designed for high strength and excellent resistance to seawater and marine corrosion environments.
Offshore / Marine / Pipe & Tube Systems
Click to enlarge
Chemical Composition
Ni: 63–70%
Cu: Balance
Al: 2.3–3.15%
Ti: 0.35–0.85%
Fe: ≤ 2.0%
Mn: ≤ 1.5%
C: ≤ 0.25%
Corrosion Resistance
Excellent resistance to seawater, brine, and marine atmosphere.
Resistant to:
• SCC
• Pitting corrosion
• Crevice corrosion
Suitable for offshore long-term service.
Monel 400 vs K-500
Monel 400: Corrosion resistant, no age hardening
K-500: Same corrosion resistance + high strength via precipitation hardening
Preferred for high-stress marine applications.
Dimensions, Mechanical Properties & Heat Treatment
Monel K-500 (UNS N05500) combines corrosion resistance with precipitation hardening capability. Its mechanical strength is achieved through controlled heat treatment after forming.
Size Range
Seamless Pipe:
OD: 6.0 – 323.9 mm
WT: 0.8 – 20 mm
Seamless Tube:
OD: 3.0 – 50.8 mm
WT: 0.3 – 5.0 mm
Coiled Tube:
OD: 3.0 – 12.7 mm
Mechanical Properties (Aged Condition)
Tensile Strength: ≥ 690 MPa
Yield Strength: ≥ 380 MPa
Elongation: ≥ 20%
Strength significantly higher than Monel 400 after precipitation hardening.
Heat Treatment Condition
Solution Annealing: 980–1000°C, water quench
Aging Treatment (Hardening):
480–620°C for precipitation strengthening
Controlled aging is essential to achieve high strength and corrosion resistance balance.
Production Condition
All pipe and tube products are supplied in solution annealed condition and can be aged after fabrication depending on final service requirements such as offshore load, pressure rating, and fatigue conditions.
Industrial Applications by Product Form
Monel K-500 (UNS N05500) is used across marine, offshore, oil & gas, and chemical industries where high strength, seawater resistance, and controlled heat treatment conditions are required.
| Product Form | Industry | Application | ASTM Standard | Heat Treatment Condition |
|---|---|---|---|---|
| Seamless Pipe | Oil & Gas / Offshore | Seawater piping, high-pressure process lines | ASTM B165 / ASME SB165 | Solution annealed + aged (480–620°C) |
| Welded Pipe | Chemical / Industrial Systems | Large diameter low-pressure process piping | ASTM B725 | Solution annealed (post weld heat treatment optional) |
| Seamless Tube | Marine / Power Generation | Heat exchangers, condensers, desalination systems | ASTM B163 / B829 | Cold worked + solution annealed + aged |
| U-Bent Tube | Power Plants / Heat Exchange | Shell & tube heat exchangers | ASTM B163 | Solution annealed before bending + stress relieved |
| Instrumentation Tube | Offshore / Control Systems | Hydraulic control lines, chemical injection systems | ASTM B163 / B829 | Cold drawn + solution annealed |
| Coiled Tube | Oil & Gas / Offshore Systems | Chemical injection, subsea control lines | ASTM B163 / B829 | Seamless cold worked + annealed condition |
| Electropolished Tube | Offshore Instrumentation / Analytical Systems | Chemical injection lines, sampling systems, high-purity fluid transfer | ASTM B163 / ASTM B829 | Cold Drawn + Solution Annealed + Electropolished |
Available Sizes & Supply Capability
Southerly Alloy supplies Monel K-500 (UNS N05500) pipe and tube products in seamless, welded, heat exchanger, and instrumentation grades. Various dimensions, delivery conditions, and testing requirements are available to meet marine, offshore, oil & gas, and industrial applications.
| Product Form | Outside Diameter | Wall Thickness | Length |
|---|---|---|---|
| Seamless Pipe | 6.0 – 323.9 mm | 0.8 – 20 mm | Up to 12 m |
| Welded Pipe | 21.3 – 1219 mm | 1.2 – 25 mm | Up to 12 m |
| Seamless Tube | 3.0 – 50.8 mm | 0.3 – 5.0 mm | Up to 18 m |
| Welded Tube | 6.0 – 76.2 mm | 0.5 – 4.0 mm | Up to 18 m |
| Instrumentation Tube | 1/8" – 1" | Custom | Straight / Coil |
| Coiled Tube | 1/4" – 1" | Custom | Continuous Length |
| Electropolished Tube (EP) | 1/8" – 1" | 0.028" – 0.083" | Straight Length / Coil |
Available Supply Conditions
- Solution Annealed
- Aged (Precipitation Hardened)
- Cold Drawn
- Bright Annealed
- Pickled Surface
- Polished Surface
Manufacturing Capability
- Cut-to-Length Service
- U-Bending Service
- Tube Coiling Service
- Custom Wall Thickness
- Special Packaging for Export
- Project-Based Supply
Manufacturing Process, Quality Inspection & Testing
Monel K-500 pipe and tube products are manufactured under controlled production procedures and inspected in accordance with ASTM specifications to ensure dimensional accuracy, mechanical performance, and corrosion resistance for critical marine, offshore, and oil & gas applications.
Manufacturing Process
- Vacuum Induction Melting (VIM)
- Hot Piercing & Extrusion
- Cold Drawing / Cold Pilgering
- Solution Annealing
- Age Hardening Treatment
- Straightening & Surface Finishing
Quality Inspection
- 100% Visual Inspection
- Dimensional Verification
- PMI Material Identification
- Heat Treatment Verification
- Surface Condition Inspection
- Full Material Traceability
Certification & Documentation
- EN 10204 3.1 MTC
- Chemical Analysis Report
- Mechanical Test Report
- NDT Reports
- Heat Treatment Records
- Third-Party Inspection Available
| Testing Method | Purpose | Applicable Products | Reference Standard |
|---|---|---|---|
| PMI Testing | Positive Material Identification | All Products | Customer Requirement |
| Hydrostatic Test | Pressure Integrity Verification | Pipe & Tube | ASTM B165 / ASTM B163 |
| Eddy Current Test (ET) | Detection of Surface & Near-Surface Defects | Tube, Instrumentation Tube, EP Tube | ASTM E426 |
| Ultrasonic Test (UT) | Internal Defect Detection | Pipe & Tube | ASTM E213 |
| Radiographic Test (RT) | Weld Seam Integrity Verification | Welded Pipe & Welded Tube | ASME Section V |
| Liquid Penetrant Test (PT) | Surface Crack Detection | Welded Products & Fabrications | ASME Section V |
| Mechanical Testing | Verification of Strength & Ductility | All Products | ASTM E8 |
| Flattening / Flaring Test | Tube Formability Verification | Tube Products | ASTM B163 |
Related Nickel Alloy Pipe & Tube Products
Explore additional corrosion-resistant and high-performance nickel alloy pipe and tube products for marine, offshore, chemical processing, and high-temperature applications.
Monel 400 Pipe & Tube
Nickel-copper alloy with excellent seawater corrosion resistance and broad industrial use.
Incoloy 825 Pipe & Tube
Excellent resistance to sulfuric and phosphoric acids in chemical processing industries.
Inconel 625 Pipe & Tube
High-strength nickel alloy for offshore, aerospace, and aggressive marine environments.
Hastelloy C276 Pipe & Tube
Outstanding resistance to oxidizing and reducing chemicals across multiple industries.
Nickel 200 Pipe & Tube
Commercially pure nickel tubing for alkali service and high-purity process systems.
Inconel 600 Pipe & Tube
Nickel-chromium alloy offering excellent oxidation resistance at elevated temperatures.
Request a Quote for Monel K-500 Pipe & Tube
Fast response within 24 hours. Send your requirements for pricing and technical confirmation.
Request a Quote