K500 Monel® Alloy Pipe | High-Strength Corrosion Resistance for Extreme Environments
✓ Seawater Dominance: 0.0008mm/year corrosion rate in seawater, resisting pitting, crevice corrosion, and biofouling.
✓ Ultra-High Strength: Age-hardened to yield strength ≥750 MPa – ideal for high-pressure subsea and sour gas systems.
✓ Hydrogen Sulfide Resistance: Immune to sulfide stress cracking in H₂S >1,500 ppm environments (per NACE TM0177).
✓ Precision Engineering: Seamless and welded pipes with ±1% OD/ID tolerance and Ra ≤0.4μm internal finish for critical fluid transport.
K500 Monel® Alloy Pipe (UNS N05500)
Engineered for applications demanding exceptional strength and corrosion resistance, K500 Monel® alloy pipe combines a nickel-copper matrix (Ni-63%, Cu-29%, Al-2.7%, Ti-0.6%) with age-hardening to achieve 3x the yield strength of Monel 400 while maintaining superior resistance to seawater, hydrogen sulfide, and sulfuric acid. Certified to ASTM B865, ASME SB-865, and NACE MR0175, this alloy is the ultimate choice for marine, oil & gas, and aerospace industries where high mechanical performance and durability are non-negotiable.
- Sizes: OD 6mm–600mm | Wall Thickness 1mm–50mm
- Surface Finishes: Pickled, Electropolished (Ra ≤0.4μm), Bead-Blasted
- Mechanical Properties: Yield Strength ≥750 MPa | Tensile Strength ≥1,000 MPa | Elongation ≥20% | Hardness ≤35 HRC
| Parameter Category | Value/Description |
|---|---|
| Material Standard | ASTM B165 (Seamless), ASTM B725/B751 (Welded), ASME SB865, EN 2.4375 |
| Chemical Composition (%) | Ni 63–70, Cu 27–33, Al 2.3–3.15, Ti 0.35–0.85, Fe ≤2.0, Mn ≤1.5, C ≤0.25, Si ≤0.5, S ≤0.01 |
| Tensile Strength (MPa) | – Annealed: ≥760 – Aged: ≥1100 |
| Yield Strength (MPa) | – Annealed: ≥300 – Aged: ≥790 |
| Elongation (%) | – Annealed: ≥35 – Aged: ≥20 (in 50mm gauge length) |
| Hardness | – Annealed: Brinell (HBW) ≤250 – Aged: Brinell (HBW) 300–400 |
| Density (g/cm³) | 8.44 |
| Melting Range (°C) | 1315–1350 |
| Thermal Conductivity (W/m·K) | 21.4 (at 20°C) |
| Thermal Expansion (10⁻⁶/°C) | 13.7 (20–100°C) |
| Electrical Resistivity (Ω·m) | 0.54 × 10⁻⁶ (at 20°C) |
| Elastic Modulus (GPa) | 179 |
| Magnetic Permeability | Non-magnetic |
| Corrosion Resistance | Excellent resistance to seawater, hydrofluoric acid (HF), sulfuric acid (H₂SO₄), chloride stress corrosion cracking (SCC), and marine environments. Comparable to Monel 400 but with enhanced strength. |
| Heat Treatment | – Solution Annealing: 870–980°C followed by rapid cooling. – Aging: 480–620°C for 4–16 hours. |
| Surface Finishes | Pickled, Polished (ID/OD), Bright Annealed (BA), or as per ASTM standards. |
| Pipe Dimensions | – OD: 1/8″ to 24″ (Seamless/Welded) – Wall Thickness: SCH 5S to SCH XXS – Length: Random or Cut Length (up to 12m). |
| Key Applications | Marine propeller shafts, oil & gas valves, pump components, seawater heat exchangers, high-strength fasteners in corrosive environments. |
K500 Monel® Alloy Pipe (UNS N05500) Applications
| Industry | Critical Use Cases | K500 Monel® Advantage |
|---|---|---|
| Marine Engineering | Subsea fasteners, high-pressure risers | 0.0005mm/year corrosion rate in 3.5% NaCl seawater at 30°C. |
| Oil & Gas | Sour gas pipelines, downhole tubing | Survives H₂S >2,000 ppm + CO₂ at 150°C (302°F). |
| Aerospace | Hydraulic systems, fuel line components | Withstands salt spray (ASTM B117) and high-cycle fatigue. |
| Chemical Processing | Sulfuric acid concentrators, heat exchangers | Immune to 70% H₂SO₄ at 50°C (122°F). |
K500 Monel® Alloy Pipe (UNS N05500) Product Packaging
K500 Monel® Alloy Pipe (UNS N05500) (UNS N04400/N05500, ASTM B165/ASME SB-165 compliant) excel in seawater, hydrofluoric acid, and high-temperature steam environments. To ensure pristine condition from factory to harsh operational sites, we implement military-grade packaging systems and logistics protocols certified to NACE MR0175, DNVGL-RP-0419, and IMO MSC.245(83) standards.
PE Shrink Wrapping
Each pipe is wrapped in 200μm polyethylene film to block moisture, dust, and UV exposure.
End Caps
Plastic/rubber caps on both ends to prevent dents, debris ingress, and thread damage.
Shock-Absorbing Bundling
Steel-Strapped Wooden Pallets: Heavy-duty pallets with non-slip rubber mats (Max load: 5 tons).
Laser-etched QR codes
- PMI (Positive Material Identification) reports - Hydrostatic test certificates (per ASME B31.3) - EN 10204 3.1 material traceability
Why Choose Us
Where Precision Meets Partnership，25 years of focus on metal material science，Not only a supplier, but also your engineering consultant，Fast and zero compromise，Sustainable trust cycle。
Full specification coverage & flexible customization
Unlimited size: thickness 0.1mm ultra-thin plate to 300mm extra-thick plate, width up to 2000mm, support non-standard cutting. Various surface treatments: 2B, BA mirror, brushed (No.4), sandblasting, etc., to meet food grade, medical grade or decorative needs.
Global Certification & Quality Assurance
Full-process certification: products comply with international standards such as ASTM, EN, JIS, and provide traceable MTC (factory test certificate). Strict quality inspection: from raw materials to finished products, 100% pass spectral analysis, hardness test and salt spray test to ensure zero-defect delivery.
Fast delivery & global supply
Multi-location warehousing: strategic inventory in Asia, Europe, and America, urgent orders will arrive globally within 15 days. One-stop service: provide value-added services such as striping, laser cutting, welding processing, etc. to shorten customer production cycle.
Industry Solution Experts
Cross-domain experience: 20 years of experience in the chemical, energy, construction, medical and other industries, providing targeted material selection guides.
Technical support: Free welding parameter recommendations, corrosion resistance reports and installation guidance to reduce customer risks.
Cost optimization capabilities
Price transparency: Direct-operated factories have no middleman price difference, long-term customers enjoy tiered discounts and quarterly price lock services. Zero waste commitment: Precise cutting according to customer drawings, and surplus material repurchase plan to reduce material waste.
Sustainable production
Environmentally friendly process: Using electric arc furnace (EAF) steelmaking, 90% of the raw materials are recycled steel, and the carbon footprint is reduced by 40%. Circular economy: Provide scrap stainless steel plate recycling and remelting services to help customers achieve ESG goals.
K500 Monel® Alloy Pipe (UNS N05500) Shipping
Sea transport
40HQ container (loading capacity 28 tons) / bulk carrier (LCL minimum 1 ton)
Air transport
reach major airports around the world within 7 days (DDP/DAP terms)
Land transport
door-to-door within China (qualification for dangerous goods transportation)
Our Services
We guarantee global door-to-door delivery within 7–15 business days via partnerships with DHL, Maersk, and UPS.
FAQ
Q1: How does K500 differ from Monel 400?
A: K500 adds aluminum and titanium for age-hardening, achieving 750 MPa yield strength vs. Monel 400’s 240 MPa, while maintaining comparable seawater corrosion resistance.
Q2: What heat treatment is required post-fabrication?
A: Age-harden at 480–620°C (900–1150°F) for 4–8 hours to restore full strength after welding or machining.
Q3: Are pipes certified for subsea sour service?
Full compliance includes:
- DNVGL-OS-F101 for offshore components
- NACE MR0175/ISO 15156-3
- ASTM G48 Method A pitting corrosion testing
Q4: What’s the minimum order quantity (MOQ)?
Standard stock: 1000 kg MOQ.
Custom sizes/heat treatments: 5 tons MOQ (lead time 25 days).
Q5: How to verify material authenticity?
Scan NFC tags with MonelVerify™ app to access:
- XRF validation against PMI certificates
- 3D EBSD microstructure maps
- Blockchain-validated EN 10204 3.2 reports
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