Cupronickel Alloy 230 for Low-Voltage Apparatus CuNi2 Wire

Product Specifications

Prod Model:	CuNi2
Markets:	North America,South America,Eastern Europe,Southeast Asia,Africa,Oceania,Mid East,Eastern Asia,Western Europe
Diameter:	0.04mm~8mm
Status:	Bright
Max Continuous Service Temp:	200 Oc
Resistivity At 20oc:	0.05 ± 10% Ohm*mm2/M
Density:	8.9 g/cm3
Temperature Coefficient Of Resistance:	< 120 ×10-6/Oc
Melting Point:	1090 Oc
Tensile Strength:	Min 220 MPa
Elongation:	Min 25%
Micrographic Structure:	Austenite
Product Type:	Wire
Carbon Content:	Low Carbon
Material:	CuNi

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

 


Copper Nickel Low Resistance Alloys
 
1. Description
 
Cupronickel, also can be called copper nickel alloy, is an alloy of copper, nickel and strengthening impurities, such as iron and manganese.  
 
 
CuNi2
 
       Chemical Content(%)
 

Mn	Ni	Cu
	2	Bal.

 
 
 
 
 
 
 
       Mechanical Properties
 

Max Continuous Service Temp	200 ºC
Resistivity at 20ºC	0.05 ± 10% ohm*mm2/m
Density	8.9 g/cm3
Temperature Coefficient of Resistance	< 120  ×10-6/ºC
EMF VS Cu (0~100ºC)	-12 μV/ºC
Melting Point	1090 ºC
Tensile Strength	Min 220 Mpa
Elongation	Min 25%
Micrographic Structure	Austenite
Magnetic Property	Non.

 
 
2. Specification
 
Wire: Diameter: 0.04mm-8.0mm
 
Strip: Thickness: 0.01mm-3.0mm
          Width: 0.5mm-120mm

3.Usage
 
It could be used to make electric heating element in low-voltage apparatus, such as thermal overload relay, low-voltage circuit breaker, and so on.

4.Features
 
It has nice corrosion resistance, good malleability and solderability. 
 
5. Packing detail
 
 1) Coil (plastic spool) + compressed ply-wooden case + pallet 
 2) Coil (plastic spool) + carton + pallet  
 
6. Products and services
 
1). Pass: ISO9001 certification, and SO14001cetification;
2). Fine after-sale services;
3). Small order accepted;
5). Fast delivery;