MONEL® alloy 401 is a nickel-copper alloy known for its high strength and excellent corrosion resistance in a variety of environments. This product introduction covers its chemical composition, mechanical properties, performance at different temperatures, industry applications, shapes, sizes, production standards, and other pertinent details.
Chemical Composition
Element
Composition (%)
Nickel (Ni)
66.5 min
Copper (Cu)
31.5-37.0
Iron (Fe)
1.0 max
Manganese (Mn)
1.0 max
Silicon (Si)
0.25 max
Carbon (C)
0.3 max
Sulfur (S)
0.024 max
Mechanical Properties
Property
Value
Tensile Strength (Annealed)
760 MPa (110 ksi) min
Yield Strength (Annealed)
345 MPa (50 ksi) min
Elongation (Annealed)
45% min
Hardness (Annealed)
75 HRB max
Performance at Different Temperatures
Temperature Range
Performance
Room Temperature
Excellent corrosion resistance, good mechanical properties
Elevated Temperatures (up to 300°C / 570°F)
Maintains strength and toughness
Cryogenic Temperatures
Retains ductility and toughness
Industry Applications
MONEL® alloy 401 finds applications in various industries requiring corrosion resistance and high strength:
Industry
Applications
Marine
Shipbuilding, seawater piping
Chemical Processing
Sulfuric acid production, chemical vessels
Aerospace
Aircraft components, fuel tanks
Oil & Gas
Valve trim, pump shafts
Shapes, Sizes, and Production Standards
Shapes and Sizes
Form
Size Range
Sheets
Thickness: 0.5 mm – 3 mm
Plates
Thickness: 1 mm – 50 mm
Bars
Diameter: 6 mm – 100 mm
Pipes
OD: 6 mm – 500 mm
Tubes
OD: 6 mm – 300 mm
Production Standards and Corresponding Grades
Country
Standard
Corresponding Grade
United States
ASTM B127, ASTM B164
UNS N04401
Germany
DIN 17750, DIN 17751
2.4361
France
AFNOR NFM 87-310
–
United Kingdom
BS 3072, BS 3073
NA11
Japan
JIS NW 4401
–
China
GB/T 12771, GB/T 12770
–
Welding, Machining, Polishing, Heat Treatment, and Cold Working
Process
Details
Welding
Welds with matching composition filler metals
Machining
Requires sharp tools and proper cooling
Polishing
Achieves good surface finish with mechanical methods
Heat Treatment
Annealing at 870°C (1600°F) followed by water quenching
Cold Working
Can be cold worked to various degrees for shaping
Advantages and Disadvantages
Aspect
Advantages
Disadvantages
Advantages
High strength and corrosion resistance
Limited availability in certain forms
Good ductility and toughness
Machining can be challenging
Suitable for marine and chemical processing applications
Costlier compared to some alternatives
Retains properties at elevated temperatures
Similar Products
Material Grade
Comparison
Alloy 400
Similar composition with slightly different mechanical properties
Conclusion
MONEL® alloy 401 is a robust nickel-copper alloy renowned for its corrosion resistance and mechanical strength, making it ideal for marine, chemical processing, and aerospace applications. Its ability to withstand harsh environments and maintain integrity at high temperatures ensures reliability in critical industrial processes. Engineers and designers seeking a durable material for demanding applications can rely on MONEL® alloy 401 for consistent performance and longevity.
For detailed technical specifications and customized solutions, consulting with material suppliers and referencing specific product data sheets is recommended.
