AMS 4574 / Monel 400 Nickel-Copper Alloy
AMS 4574 specification covers a corrosion-resistant nickel-copper alloy in the form of seamless tubing. Monel 400 (UNS N04400) is a high-performance nickel-copper alloy known for its exceptional corrosion resistance, high strength, and toughness and used for marine engineering, chemical, hydrocarbon processing equipment, and heat exchangers.
Available Product Forms
Monel 400 is supplied in:
Seamless & Welded Tubing
Instrumentation & Hydraulic Tubing
Precision & Coiled Tubing
Corrosion Resistance
Resists seawater, hydrofluoric acid, sulfuric acid, and alkalis.
High Strength & Toughness
Comparable to structural steel
Good Thermal Conductivity
Suitable for heat exchangers
Weldable & Machinable
Compatible with common fabrication methods
Chemical Composition
| Weight % | Ni | Cu | Fe | Mn | C | S | Si |
| Nickel 400 Tube | 63.0 min | 28-34 | 2.50 max | 2 max | 0.30 max | 0.024 max | 0.50 max |
Mechanical Properties
| Material | Tensile Strength MPa | Yield Strength (0.2% Offset) MPa | Elongation (%) | Hardness Rockwell B |
| Alloy 400 Tube | 482-586 | 172-310 | 50-35 | 75 max |
Standard Size Ranges
| Parameter | Range |
|---|---|
| Outside Diameter (OD) | 0.25mm (0.010") – 16.00mm (0.625") |
| Wall Thickness | 0.05mm (0.002") – 1.00mm (0.040") |
| Straight Lengths | Up to 5000mm (197") |
| Coiled Lengths | 5m – 15m |
Tolerances
Standard: OD/ID ±0.03mm (0.0012"), Wall ±10%
Tight Tolerance: OD/ID ±0.015mm (0.0006"), Wall ±3%
Custom thin-wall tubes up to 25.4mm (1.000") available upon request.
Applications of Monel 400 Tubing
Due to its superior corrosion resistance and mechanical properties, Monel 400 is widely used in:
- Marine Engineering (pumps, valves, propeller shafts)
- Chemical Processing (reactors, heat exchangers)
- Oil & Gas (downhole components, piping systems)
- Aerospace & Defense (hydraulic systems, instrumentation)
Lork Group is a leading global supplier of high-quality Monel 400 (UNS N04400/AMS 4574) tubing, providing corrosion-resistant nickel-copper alloy solutions for demanding industrial applications. Our seamless and welded Monel 400 tubes meet the strictest quality standards.
Contact Lork Group Now for:
→ Technical Specifications
→ Current Inventory Availability
→ Volume Discount Pricing
→ Custom Manufacturing Options
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