Cupro Nickel Alloy CuNi2 Foil for Thermal Overload Relay

• Product Type: Foil
• Material: CuNi
• Carbon Content: Low Carbon
• Thickness: 0.01mm~3mm
• Width: 0.5mm~200mm
• Status: Bright
• Model NO.: CuNi2
• Chemical Composition: CuNi
• Max Continuous Service Temperature(Oc): 200
• Density(G/Cm³): 8.9
• Tensile Strength(MPa): >= 220
• Approximate Melting Point(Oc): 1090
• Micrographic Structure: Austenite
• Magnetic Property: Non
• Transport Package: in Roll/Coil/Spool
• Specification: GB/T 6145-1999
• Trademark: Ualloy
• Origin: China
• HS Code: 74082900
• Production Capacity: 50t/Month

Product Description

Copper Nickel Alloys

Model No.: CuNi2

Those are alloys of chemical composition copper + nickel with addition of manganese with a low resistivity (from 231.5 to 23.6 Ohm. Mm2/ft).

The most known, CuNi 44 (also called Constantan) presents the advantage of a very low temperature coefficient.

Their advantages are the following:

Very good resistance to corrosion
Very good malleability
Very good solderability

Chemical Composition and Main Property of Cu-Ni Low Resistance Alloy
Properties\Grade		CuNi1	CuNi2	CuNi6	CuNi8	CuMn3	CuNi10
Main Chemical Composition	Ni	1	2	6	8	_	10
	Mn	_	_	_	_	3	_
	Cu	Bal	Bal	Bal	Bal	Bal	Bal
Max Continuous Service Temperature(ºC)		200	200	200	250	200	250
Resisivity at 20ºC  (μΩ·m)		0.03	0.05	0.1	0.12	0.12	0.15
Density(g/cm³)		8.9	8.9	8.9	8.9	8.8	8.9
Thermal Conductivity(α × 10-6ºC)		< 100	< 120	< 60	< 57	< 38	< 50
Tensile Strength(Mpa)		≥ 210	≥ 220	≥ 250	≥ 270	≥ 290	≥ 290
EMF vs Cu(μV/ºC)(0~1000ºC)		-8	-12	-12	-22	_	-25
Approximate Melting Point(ºC)		1085	1090	1095	1097	1050	1100
Micrographic Structure		austenite	austenite	austenite	austenite	austenite	austenite
Magnetic Property		non	non	non	non	non	non
Properties\Grade		CuNi14	CuNi19	CuNi23	CuNi30	CuNi34	CuNi44
Main Chemical Composition	Ni	14	19	23	30	34	44
	Mn	0.3	0.5	0.5	1	1	1
	Cu	Bal	Bal	Bal	Bal	Bal	Bal
Max Continuous Service Temperature(ºC)		300	300	300	350	350	400
Resisivity at 20ºC  (μΩ·m)		0.2	0.25	0.3	0.35	0.4	0.49
Density(g/cm³)		8.9	8.9	8.9	8.9	8.9	8.9
Thermal Conductivity(α × 10-6ºC)		< 30	< 25	< 16	< 10	< 0	< -6
Tensile Strength(Mpa)		≥ 310	≥ 340	≥ 350	≥ 400	≥ 400	≥ 420
EMF vs Cu(μV/ºC)(0~1000ºC)		-28	-32	-34	-37	-39	-43
Approximate Melting Point(ºC)		1115	1135	1150	1170	1180	1280
Micrographic Structure		austenite	austenite	austenite	austenite	austenite	austenite
Magnetic Property		non	non	non	non	non	non