K500 Nickel Copper Alloy

K500 Nickel Copper Alloy

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Monel K500 alloy round bar is a Ni-Cu-based alloy. By adding a small amount of Al and Ti elements, the Ni3 (Al, Ti) phase is precipitated. It retains the excellent corrosion resistance of Monel 400 alloy, and at the same time has excellent corrosion resistance due to precipitation strengthening. High strength, widely used in petroleum, chemical industry, atomic energy and other industrial fields.

By adding Al, Ti and other elements to the Ni-Cu matrix, a malleable precipitation NMening Monel K500 alloy is produced. This alloy shows excellent corrosion resistance in seawater, acid, alkali and salt environments, and is compatible with Ni-Cr-based alloys and precipitation-NMened low-alloy steels have room temperature strength and NMness comparable to that of Ni-Cr-based alloys. They are tough and plastic even at low temperatures of -25K and can maintain their strength at temperatures as high as 920K. The alloys are particularly suitable for making field oil production electricity. The pump shaft of a submersible pump.

 

 

	Cr	Ni	Mo	Co	Nb (+Ta)	Ti	V	W	Cu	C	Mn	N	Si	P	S	Fe	Al
Min		63.00				0.35			27.00								2.30
Max						0.85			33.00	0.25	1.50		0.50		0.010	2.00	3.15

 

 

Element	Density	Melting Point	Tensile Strength	Yield Strength (0.2%Offset)	Elongation
Monel K500	8.44 g/cm3	1350 °C (2460 °F)	Psi – 160000 , MPa – 1100	Psi – 115000 , MPa – 790	20 %

 

 

Density (Kg/m3)	8430
Magnetic Permeability (20°C)	<1.005 (1.002 typical)
Young's Modulus (kN/mm2)	179
Specific Electrical Resistance, 20°C (µΩ-m)	0.62
Mean coefficient of thermal expansion, 20-100°C (m/m/degC)	13.4 x 10-6
Specific Heat, 20°C (J/kg.K)	418
Thermal conductivity, 20°C (W/m.K)	17.5
Curie Temperature (°C)	-90

 

 

(1) Adding a trace amount of Mg to Monel K-500 alloy can increase the grain boundary bonding force and improve high-temperature plasticity.

 

(2) The high-temperature plasticity of the experimental alloy with trace amounts of Mg, Cr and Co added at the same time is significantly improved, and it exhibits a certain degree of superplasticity. The strain rate sensitivity index m at 1010°C is 0.32, and the maximum elongation is 240%.

 

(3) The theoretical calculation of the fracture work of impurity elements segregated at grain boundaries shows that Mg, Cr and Co have the effect of improving the grain boundary bonding force of Ni-Cu alloy, and therefore can improve the high-temperature plasticity of Monel K-500 alloy.

 

(4) The deformation activation energy is low during superplastic deformation, and the process may be controlled by diffusion.

 

 

 

 

 

 

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