Constantan Cuprothal49 CuNi44 Flat Wire Strip Rod Cooper Nickel Alloy for Industrial Rheostats

• Customization: Available
• Product Type: Wire
• Material: CuNi
• Model NO.: SP-CuNi44
• Name: Constantan Cuprothal49 CuNi44 Flat Wire Strip Rod
• Material Type: CuNi44
• Resistivity: 0.49(at 20c (Ohmmm2/M))
• Application: Heating Wire
• Warrenty: 3 Years
• Transport Package: Spool+Paper Carton
• Specification: 0.03-8mm
• Trademark: Ohmalloy/OEM
• Origin: China
• HS Code: 7408290000
• Production Capacity: 30 Tons Per Month

Product Description

Constantan Cuprothal49 CuNi44 Flat Wire Strip Rod Cooper Nickel Alloy for Industrial Rheostats

Constantan( Ohmalloy 049)

(Common Name: CuNi44,.Cuprothal49, Alloy 294, Cuprothal 294, Alloy 49, CuNi 102, Cu-Ni 44, Konstantan, Constantan.)

OhmAlloy049 is a copper-nickel alloy (Cu56Ni44 alloy) characterized by high electrical resistance, high ductility and good corrosion resistance. It is suitable for use at temperatures up to 400°C

Typical applications for OhmAlloy49 are temperature-stable potentiometers, industrial rheostats and electric motor starter resistances.

Copper Nickel Alloy Production Standard(GB/T1234-95)

Performance Brand		NC020 CuNi14	NC025 CuNi19	NC030 CuNi23	NC035 CuNi30	NC040 CuNi34	NC050 CuNi44
Main Chemical Content%	Ni	14.2	19	23	30	34	44
	Mn	0.3	0.5	0.5	1.0	1.0	1.0
	Cu	Bal.	Bal.	Bal.	Bal.	Bal.	Bal.
Element Max Working TemperatureºC		300	300	300	350	350	400
Density g/cm3		8.9	8.9	8.9	8.9	8.9	8.9
Resistivity Ωmm2/m, at 20ºC		0.20±5%	0.25±5%	0.30±5%	0.35±5%	0.40±5%	0.49±5%
Temperature factor of resistivity 10-5/ºC(200-600ºC)		<38	<25	<16	<10	-0	<-6
Melting Point ºC		1115	1135	1150	1170	1180	1280
Tensile Strength MPa		≥310	≥340	≥350	≥400	≥400	≥420
Enlogation%(>1.0)		≥25	≥25	≥25	≥25	≥25	≥25
EMF VS Copper V/ºC(0-100ºC)		-28	-32	-34	-37	-39	-43
Specific heat capacity j/gk(20ºC)		0.38	0.38	0.38	0.39	0.40	0.41
Conductivity coefficient w/mk at20ºC		48	38	33	27	25	23
Organizational attribute		Austenitic	Austenitic	Austenitic	Austenitic	Austenitic	Austenitic
Magnetic		None-Magnetic	None-Magnetic	None-Magnetic	None-Magnetic	None-Magnetic	None-Magnetic

Corrosion resistance performance

Alloys	Working In atmosphere at 20ºC	Working at max temperature 200ºC
		Air and oxygen contain gases	gases with Nitrogen	gases with sulfur oxidability	gases with sulfur reductibility	carburization
OhmAlloy049	good	good	good	good	bad	good

Style of supply

Alloys Name	Type	Dimension
OhmAlloy049W	Wire	D=0.06mm~8mm
OhmAlloy049R	Ribbon	W=0.4~40	T=0.05~2.9mm
OhmAlloy049S	Strip	W=8~200mm	T=0.1~3.0
OhmAlloy049F	Foil	W=6~120mm	T=0.005~0.1
OhmAlloy049B	Bar	Dia=8~100mm	L=50~1000

The addition of nickel to pure copper can significantly improve the strength, corrosion resistance, hardness, electrical resistance and thermoelectricity, and reduce the temperature coefficient of resistivity. Therefore, compared with other copper alloys, the mechanical and physical properties of cupronickel are extremely good, with good ductility, high hardness, beautiful color, corrosion resistance and deep drawing performance.

It is widely used as corrosion-resistant structural parts in shipbuilding, petroleum, chemical, construction, electric power, precision instruments, medical equipment, musical instruments and other departments. Some cupronickel has special electrical properties, which can be used to make resistance elements, thermocouple materials and compensation wires. Non-industrial cupronickel is mainly used to make decorative crafts.

 Copper Nickel Alloy Wire Application