Nichrome Alloy Ni70Cr30

Product Detail

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Ni70Cr30

(Common Name:Ni70Cr30, Nikrothal 70, N7, HAI-NiCr 70, Chromel 70/30, Resistohm 70, Balco,Tophet 30,Cronix 70,Alloy 710,Stablohm 710)

Ni70Cr30 is a nickel-chromium alloy (NiCr alloy) characterized byHigh resistivity, good oxidation resistance,very good form stability,good ductility and excellent weldability. It is suitable for use at temperatures up to 1250°C.

Typical applications for Ni70Cr30 are used in electrical heating elements in industrial furnace,and well suited for reducing atmospheres.
Normal composition%


C	P	S	Mn	Si	Cr	Ni	Al	Fe	Other
Max
0.05	0.02	0.015	0.60	0.75~1.60	28.0~31.0	Bal.	Max 0.50	Max 1.0	-

Typical Mechanical properties(1.0mm)

Yield strength	Tensile Strength	Elongation
Mpa	Mpa	%
430	820	30

Typical Physical properties


Density (g/cm3)	8.2
Electrical resistivity at 20?(?mm2/m)	1.18
Conductivity coefficient at 20? (WmK)	14




Coefficient of thermal expansion
Temperature	Coefficient of Thermal Expansion x10-6/?
20 ?- 1000?	17




Specific heat capacity
Temperature	20?
J/gK	0.46




Melting point (?)	1380
Max continuous operating temperature in air (?)	1250
Magnetic properties	non-magnetic

Temperature Factors Of Electrical Resistivity

20?	100?	200?	300?	400?	500?	600?
1	1.007	1.016	1.028	1.038	1.044	1.036
700?	800?	900?	1000?	1100?	1200?	1300?
1.03	1.028	1.029	1.033	1.037	1.043	-

Style of supply

Alloys Name	Type	Dimension
Ni70Cr30W	Wire	D=0.03mm~8mm
Ni70Cr30R	Ribbon	W=0.4~40	T=0.03~2.9mm
Ni70Cr30S	Strip	W=8~250mm	T=0.1~3.0
Ni70Cr30F	Foil	W=6~120mm	T=0.003~0.1
Ni70Cr30B	Bar	Dia=8~100mm	L=50~1000