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NICKEL-COPPER ALLOY
Monel 400
UNS N04400, AMS 4544, QQ-N-281
Nickel-Copper AlloyHigh Cost
DENSITY
9 kg/m³
MELTING POINT
1,300°C
TENSILE STRENGTH
550 MPa
MAX SERVICE TEMP
480°C
Monel 400 is a nickel-copper alloy used in aerospace applications. Melting point: 1,300 °C. Tensile strength: 550 MPa.
ABOUT MONEL 400
Monel 400 is a nickel-copper alloy with excellent resistance to seawater, hydrofluoric acid, and many reducing chemicals. It maintains good mechanical properties from cryogenic to moderately elevated temperatures. In aerospace, it is used for propellant system valves, fasteners exposed to corrosive exhaust, and marine launch facility hardware.
CHEMICAL COMPOSITION
Ni 63%, Cu 28-34%, Fe 2.5% max, Mn 2% max
ROCKET & SPACECRAFT APPLICATIONS
●Propellant system valves
●Seawater-exposed fasteners
●Pump shafts
●Launch pad deluge system piping
●Hydrocarbon fuel system components
MANUFACTURING PROPERTIES
CORROSION RESISTANCE
Excellent
WELDABILITY
Good
MACHINABILITY
Fair
COST RATING
High
MECHANICAL PROPERTIES
| DENSITY | 9 kg/m³ |
| TENSILE STRENGTH | 550 MPa |
| YIELD STRENGTH | 240 MPa |
| STRENGTH-TO-WEIGHT | 62500 kN·m/kg |
THERMAL PROPERTIES
| MELTING POINT | 1,300 °C |
| MAX SERVICE TEMPERATURE | 480 °C |
| THERMAL CONDUCTIVITY | 21.8 W/m·K |
| THERMAL EXPANSION | 13.9 µm/m·K |
COMPLETE SPECIFICATIONS
| CATEGORY | Nickel-Copper Alloy |
| DESIGNATIONS | UNS N04400, AMS 4544, QQ-N-281 |
| MANUFACTURER | Special Metals Corporation |
| DENSITY | 9 kg/m³ |
| TENSILE STRENGTH | 550 MPa |
| YIELD STRENGTH | 240 MPa |
| MELTING POINT | 1,300 °C |
| MAX SERVICE TEMP | 480 °C |
| THERMAL CONDUCTIVITY | 21.8 W/m·K |
| THERMAL EXPANSION | 13.9 µm/m·K |
| CORROSION RESISTANCE | Excellent |
| WELDABILITY | Good |
| MACHINABILITY | Fair |
| COST RATING | High |
