Monel® Alloy Pipe (Monel 400, Monel K-500)
✓ Seawater Immunity: Resists pitting/crevice corrosion in 3.5% NaCl seawater with **<0.02mm/year corrosion rate** (Monel 400).
✓ Acid Dominance: Withstands 20% H₂SO₄ and 15% HF at 80°C (176°F) without degradation.
✓ High-Strength Performance: Monel K-500 achieves 1,100 MPa tensile strength via age-hardening – 2x stronger than Monel 400.
✓ Precision Manufacturing: Seamless pipes with **±0.1mm wall thickness tolerance** and Ra ≤0.8μm surface finish for leak-free systems.
Monel® Alloy Pipe (Monel 400, Monel K-500)
Engineered for industries demanding superior resistance to seawater, acids, and high-pressure environments, Monel® alloy pipes combine nickel-copper matrices (Monel 400: Ni-67%, Cu-30%) to deliver unmatched durability in the harshest conditions. Certified to ASTM B165, ASME SB165, and NACE MR0175, these seamless/welded pipes outperform stainless steel with 5x longer lifespan in saltwater, sulfuric acid (H₂SO₄), and hydrofluoric acid (HF) environments, ensuring reliability for marine, chemical, and oil & gas applications.
- Sizes: 1/8″–24″ (DN6–DN600)
- Wall Thickness: 0.5mm–50mm (seamless/welded)
- Surface Finishes: Annealed, Pickled, Electropolished (Ra ≤0.4μm)
- Pressure Rating: PN100 (1,000 PSI) at 400°C (752°F)
- Mechanical Properties (Monel 400): Yield Strength ≥240 MPa | Tensile Strength ≥550 MPa | Elongation ≥35% | Hardness ≤150 HB
| Parameter Category | Monel 400 | Monel K-500 |
|---|---|---|
| Material Standard | ASTM B165, UNS N04400 | ASTM B725, UNS N05500 |
| Chemical Composition (%) | Ni: 63–70, Cu: 28–34, Fe: ≤2.5, Mn: ≤2.0, Si: ≤0.5, C: ≤0.3, S: ≤0.024 | Ni: 63–70, Cu: 27–33, Al: 2.3–3.15, Ti: 0.35–0.85, Fe: ≤2.0, Mn: ≤1.5, Si: ≤0.5, C: ≤0.25 |
| Tensile Strength (MPa) | 480–620 (Annealed) | 1000–1170 (Aged) |
| Yield Strength (MPa) | ≥170 (Annealed) | ≥690 (Aged) |
| Elongation (%) | ≥35 (in 50mm gauge length) | ≥20 (in 50mm gauge length) |
| Hardness | Rockwell B65–85 | Rockwell C25–35 |
| Density (g/cm³) | 8.80 | 8.44 |
| Melting Range (°C) | 1300–1350 | 1315–1350 |
| Thermal Conductivity (W/m·K) | 21.8 (at 20°C) | 26.0 (at 20°C) |
| Thermal Expansion (10⁻⁶/°C) | 14.4 (20–300°C) | 13.9 (20–300°C) |
| Max Service Temperature (°C) | 540 (continuous) | 400 (continuous) |
| Corrosion Resistance | Excellent resistance to seawater, hydrofluoric acid, alkalis, and saltwater pitting. | Similar to Monel 400, with enhanced resistance to stress corrosion cracking. |
| Pressure Rating (Bar) | 16–150 (schedule 10S–XXS) | 16–250 (schedule 10S–XXS) |
| Heat Treatment | Annealing: 870–980°C (air cooling). | Solution Treatment: 980–1040°C (water quench) + Aging: 480–620°C for 16h. |
| Surface Finishes | Annealed & Pickled, Polished (Ra ≤0.8μm), Bead Blasted. | Hot Rolled, Solution Treated, Aged, Polished. |
| Dimensions (ASTM B165) | – OD: 10.3–600mm – Wall Thickness: 1.24–30mm – Length: 5–12m. | – OD: 10.3–500mm – Wall Thickness: 1.24–25mm. |
| Key Applications | Marine condensers, chemical processing pipes, heat exchangers, seawater valves. | High-strength oil & gas downhole tubing, pump shafts, marine propeller shafts. |
Monel® Alloy Pipe (Monel 400, Monel K-500) Applications
| Industry | Critical Use Cases | Monel® Pipe Advantage |
|---|---|---|
| Marine Engineering | Seawater cooling systems, desalination pipes | Zero pitting in saltwater for 20+ years. |
| Chemical Processing | HF acid transfer lines, sulfuric acid reactors | Resists 15% HF at 50°C (122°F). |
| Oil & Gas | Subsea pipelines, sour gas wellhead components | K-500 withstands H₂S >5,000 ppm at 150°C (302°F). |
| Power Generation | Boiler feedwater systems, steam condensers | Immunity to steam erosion at 400°C (752°F). |
Monel® Alloy Pipe (Monel 400, Monel K-500) Product Packaging
Monel® Alloy Pipe (Monel 400, Monel K-500) (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).
QR-coded tags
QR-coded tags linked to Mill Test Certificates (MTC), EN 10204 3.1 standards, and pipe batch history.
Monel® Alloy Pipe (Monel 400, Monel K-500) 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.
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 specifications and customization
Unlimited size, support non-standard cutting. Multiple surface treatments.
Professional capabilities
25 Years Of Focus On Metal Materials Science
Certification & Quality Assurance
Products comply with international standards such as ASTM, EN, JIS, etc., and are 100% tested from raw materials to finished products
Fast delivery & global supply
Global urgent orders are delivered within 15 days. One-stop service
FAQ
Q1: How does Monel 400 differ from Monel K-500?
A: Monel 400 prioritizes corrosion resistance, while K-500 (age-hardened) offers 1,100 MPa tensile strength for high-stress structural applications.
Q2: What welding methods prevent hot cracking?
A: Use ENiCu-7 filler with TIG welding, maintain interpass temps ≤150°C (302°F), and avoid sulfur-containing environments.
Q3: Are pipes certified for offshore platforms?
Full compliance includes:
- NACE MR0175/ISO 15156
- ASME SB165
- DNV-OS-F101 Subsea Standards
Q4: What’s the minimum order quantity (MOQ)?
Standard stock: 1 ton MOQ.
Custom sizes/tempers: 5 tons MOQ (lead time 35 days).
Q5: How to validate material authenticity?
Scan NFC tags with MonelGuard™ app to access:
- XRF validation against PMI certificates
- Third-party SGS/BV hydrotest data
- Blockchain-validated ASTM B165 mill certs
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