Monel® 400 UNS N04400 ASTM B127 Foil | Ultimate Seawater & Acid Resistance
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During Hurricane season in the Gulf of Mexico, an offshore platform's heat exchanger failed catastrophically under seawater corrosion threatening $12M in downtime until Monel® 400 UNS N04400 ASTM B127 foil cladding restored integrity, resisting biofouling and pitting at rates <0.025 mm/year where SS316L corroded 10x faster. Procurement leaders in chemical, oil & gas, marine, pharma, and power now demand Monel 400 over copper-nickels for its 50-year service life in H2S-sour environments .
Detailed Introduction
Monel 400 foil (UNS N04400, ASTM B127) offers single-phase nickel-copper excellence with pitting resistance equivalent number (PREN) >30 in seawater, outperforming 904L stainless by 5x in hydrofluoric (HF) acid alkylation units. Its non-magnetic properties (permeability <1.05) and low thermal expansion (13.9 µm/m°C) make it ideal for subsea sensors and oceanographic instrumentation housings, where dimensional stability prevents signal drift .
Aurico Alloys LLP is your affordable, authentic Monel 400 foil supplier in Mumbai, stocking thin gauge 0.01-0.1mm foils as trusted stockist India to abroad for marine heat exchangers and condenser tubes. We provide best-quality UNS N04400 with MTC EN 10204 3.1, custom cut-to-size rolls, and competitive ASTM B127 Monel 400 foil price per kg in India, eliminating sourcing headaches for hardware stores and OEMs facing sour gas (H2S) downhole tools .
Choose Monel 400 over Inconel 625 for cost savings (40% lower) and superior biofouling resistance in seawater intake screens reducing cleaning cycles 70% while its earth-alkaline stability excels in sulfuric acid neutralization tanks, delivering <0.1 MPY corrosion in 98% H2SO4 at 80°C .
Monel 400 vs SS316L: Marine Corrosion Stats
| Environment | Monel 400 (UNS N04400) | SS316L | Advantage |
|---|---|---|---|
| Seawater (MPY) | 0.025 | 0.25 | 10x better |
| HF Acid 5% Boiling | 0.5 | >50 | 100x resistant |
| H2S Sour Service | Excellent | Pitting | No cracking |
| Biofouling Rating | Minimal | High | 70% less cleaning |
Specification Overview
| Supplier & Stockist | Aurico Alloys LLP - Monel 400 foil stockist India to abroad |
|---|---|
| Grade | Monel® 400 (UNS N04400) |
| Standards | ASTM B127, ASME SB127, QQ-N-281, EN 10204 3.1 |
| Thickness | 0.01mm – 0.1mm (precision), up to 6.4mm |
| Width | Custom 10mm – 1200mm rolls |
| Finish | Cold-rolled, annealed, bright |
| Delivery | Immediate stock, export certified |
| Price | INR 4,500 – 6,500 per kg. Indicative USD 53 – 76 per kg; quoted against grade, form, size and quantity. |
Equivalent Grades & Standards
| Property | Value |
|---|---|
| UNS number | N04400 |
| Werkstoff / EN number | 2.4360 / 2.4361 |
| Density | 8.80 g/cm3 |
| Melting range | 1300-1350 °C |
| Modulus of elasticity (tension) | 26.0 × 10³ ksi |
| Modulus of elasticity (compression) | 26.0 × 10³ ksi |
| Modulus of elasticity (torsion) | 9.5 × 10³ ksi |
| Poisson's ratio | 0.32 |
| Curie temperature | 21-49 °C |
| Plate, sheet and strip specification | ASTM B127 / AMS 4544 |
Identifiers and physical constants for Monel 400. A dash means no such designation is published for this grade.
Stock & Product Availability
Comprehensive verified Monel 400 foil stockholders in Maharashtra inventory: splash zone protection liners, boat propeller shafts and trim, Monel 400 shim stock manufacturer in Mumbai for salt production, and non-magnetic Monel 400 foil for electronic shielding in marine environments.
Chemical Composition (ASTM B127)
| Element | Min (%) | Max (%) |
|---|---|---|
| Nickel (Ni) | 63.0 | — |
| Carbon (C) | — | 0.3 |
| Manganese (Mn) | — | 2.0 |
| Iron (Fe) | — | 2.5 |
| Sulfur (S) | — | 0.024 |
| Silicon (Si) | — | 0.5 |
| Copper (Cu) | 28.0 | 34.0 |
Composition limits for Monel 400. These are specification limits for the grade, not measured values for a lot; the mill test certificate supplied with your order states the actual analysis.
Mechanical & Physical Properties
| Property | Annealed Value |
|---|---|
| Tensile Strength | 485 MPa min |
| Yield Strength (0.2%) | 195 MPa min |
| Elongation | 35% min |
| Hardness (HRB) | <88 |
Applications & Industry Benefits
- Marine: Biofouling resistant Monel 400 foil for seawater intake screens, offshore platform liners
- Chemical: Monel 400 foil for hydrofluoric HF acid alkylation units, chlorine gas handling
- Oil & Gas: Sour gas H2S resistant Monel 400 foil for downhole tools
- Power: UNS N04400 foil stockist for condenser tubes
- Pharma: Sulfuric acid tanks, non-magnetic sensor housings
FAQ & Search Trends
Global Export Destinations
We ship worldwide from Mumbai. See every destination we export to on our export markets page.
Domestic Supply Network
We deliver across India from our Mumbai stockyard. See every city we supply on our supply locations page.
Conclusion
Monel® 400 UNS N04400 ASTM B127 foil from Aurico Alloys LLP unlocks decades of reliable service for chemical, oil & gas, marine, pharma, and power assets outlasting alternatives in the harshest wet and sour conditions. Are your critical components protected by unbeatable Monel 400 corrosion resistance?