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Copper-Nickel Cu70/Ni30 Alloy

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Heanjia Super-Metals Co., Ltd

Membership: BIZ

Country / Year Established: China / 1984

Business type: Manufacturer

Verified Certificate: 8

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Category	Copper Alloy & Profiles	Ingredients	-
Keyword	copper-nickel cu70ni30 alloy supplier in iceland , copper-nickel cu70ni30 alloy wire manufacturer , copper-nickel cu70ni30 alloy pipe , copper-nickel cu70ni30 alloy sheet	Unit Size	-
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Product Information

Copper-Nickel Cu70/Ni30 Alloy offers outstanding resistance to corrosion, especially in sea water, soil erosion and abrasive fluids. Cu70/Ni30 Alloy is stronger than Cu90/Ni10 and has resistance to impingement corrosion, biofouling etc. It has good ductility, high strength and low temperature coefficient of electric resistance. The content of nickel in the copper-nickel alloy enables it to retain its properties over the high temperatures.

Corrosion resistance Properties of Cu70/Ni30 alloy

The copper-nickel alloy has great resistance to seawater corrosion and biofouling. It offers long term performance in the crevice corrosion and good tolerance in the marine water. It has high corrosion resistance in the sluggish or stagnant conditions that may occur while the commissioning of a plant.

The copper-nickel Cu70/Ni30 alloy has good corrosion resistance due to its security layer that is produced when it is kept in water. It doesn’t suffer the stress corrosion cracking. The following table shows the corrosion nature of Copper-nickel alloys in the seawater (heat exchanger service)

Media	Corrosion type	Service experience
Waterside conditions
Clean seawater at velocity about 1m/s	Uniform, general	0.0025 to 0.025 mm/a	0.0025 to 0.025 mm/a
Clean seawater at velocity about 3.5 m/s	Impingement attack	Satisfactory	Satisfactory
Polluted seawater	Accelerated general and pitting	Less resistant	Recommended but not immune
Entrained sand in seawater	Accelerated general and erosion	Unfit, except in mild conditions	Use CuNi30Fe2Mn2
Accumulated deposits on surface	Local attack	Generally good	Tendency to pitting corrosion
Hot regions by local overheating	Local attack by denickelification	Good	Good however some failures in intense conditions
Corrosion plus stress	Stress corrosion	Highly resistant	Highly resistant
Vapour side conditions
Feed water heaters operating under cyclic conditions	Exfoliation attack	Resistant	Susceptible
Non-condensable gases	Local attack and general thinning	High resistance	Excellent resistance
Hydrogen sulphide in desalination plant	General attack	Less resistance	resistance

Properties of Copper-Nickel alloys

Property	Minimum Value			Maximum Value (		Units		Minimum Value		Maximum Value		Units
Atomic Volume (average)		0.0071	0.0073		m³/kmol		433.268		445.473		in³/kmol
Density		8.5	8.95		Mg/m³		530.638		558.731		lb/ft³
Energy Content		140	180		MJ/kg		15167.4		19501		kcal/lb
Bulk Modulus		130	170		GPa		18.8549		24.6564		10⁶ psi
Compressive Strength		85	550		MPa		12.3282		79.7708		ksi
Ductility		0.03	0.44				0.03		0.44
Elastic Limit		85	550		MPa		12.3282		79.7708		ksi
Endurance Limit		138	240		MPa		20.0152		34.809		ksi
Fracture Toughness		26	79		MPa.m^1/2		23.6612		71.8937		ksi.in^1/2
Hardness		580	1650		MPa		84.1219		239.312		ksi
Loss Coefficient		1.5e-005	0.00056				1.5e-005		0.00056
Modulus of Rupture		85	550		MPa		12.3282		79.7708		ksi
Poisson's Ratio		0.34	0.35				0.34		0.35
Shear Modulus		45	58		GPa		6.5267		8.41219		10⁶ psi
Tensile Strength		267	624		MPa		38.7251		90.5036		ksi
Young's Modulus		120	156		GPa		17.4045		22.6259		10⁶ psi
Glass Temperature					K						oF
Latent Heat of Fusion		220	240		kJ/kg		94.5825		103.181		BTU/lb
Maximum Service Temperature		425	480		K		305.33		404.33		oF
Melting Point		1384	1508		K		2031.53		2254.73		oF
Minimum Service Temperature		0	0		K		-459.67		-459.67		oF
Specific Heat		384	386		J/kg.K		0.297162		0.298709		BTU/lb.F
Thermal Conductivity		19	66		W/m.K		35.5686		123.554		BTU.ft/h.ft².F
Thermal Expansion		16	17		10^-6/K		28.8		30.6		10^-6/°F
Break down Potential					MV/m						V/mil

Applications of Cu70/Ni30 alloy

Seawater condenser system and desalination plants: The excellent resistance to sea water corrosion makes the copper-nickel Cu70/Ni30 alloy useful in the sea water condensers and desalination plants and pipe working in the chemical plants.

Automotive applications: Because the copper-nickel alloy Cu70/Ni30 doesn’t need surface protection, it provides additional security therefore it is commonly used in the brake and hydraulic suspension systems. It is also used in cooling systems in the automobiles like cars and other commercial vehicles.

Marine Engineering: Excellent resistance to biofouling and sea water corrosion provided by copper-nickel Cu70/Ni30 alloy makes it highly useful in the various marine applications including cladding for ship hulls, legs of oil rig platforms and sea water intake screens.

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Heanjia Super-Metals Co., Ltd

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Country / Year Established: China / 1984

Membership: BIZ

Business type: Manufacturer

President: Jialiang Zhao

Address: Rong Jing Dao, Rongjing West Road, Yizhuang Technical Economic Development Area

Product Category: Other Machinery Parts,Other Minerals & Metallurgy Products

Year Established: 1984

No. of Total Employees: 51-100

Company introduction

A professional and ISO certified manufacturer and supplier of corrosion resistant and high temperature performance metals and alloys such as Nickel,Kanthal, Inconel, Incoloy, Hastelloy, Nichrome, Nilo, Monel and Cupronickel and more are in line. We produce the alloys in the various standard forms including wire, rod, strip, pipes, sheets, tubes, bars, tape and more in the specific sizes as required by our customers. Our factory is established in China and sales office in Seattle, USA. We have worked with the diverse of industrial sectors for example aerospace, marine, automotive, nuclear, power production, pollution control and chemical engineering. Customers are assured of receiving fully tested products for their applications. Speak with our sales executive today.