Austenite Cr30Ni70 Cr15Ni60 Nickel Chromium Alloys Wire

 

Cr15Ni60 is An ideal material, it has good ductility,workability and weldability under high temperature and seismic strength.

Nickel-chromium alloy with high and stable resistance, corrosion resistance, surface oxidation resistance, eXcellent coil-forming ability.

 

Property:

 

• Not becoming brittle after long-term use and cooling down;
• Resistance to oxidation: most metals oxidize quickly and become brittle and break when heated in air. however, when heated to red-hot temperatures, nichrome wire, develops an outer layer of chromium oxide, which is thermodynamically stable in air, is mostly impervious to oxygen, and protects the heating element from further oxidation.
• Good Ductility: remaining ductile, even after long-term usage;
• Excellent weldability and etc.

 

Grades:

 

Alloy Nomenclature Performance		Cr20Ni80	Cr30Ni70	Cr15Ni60	Cr20Ni35	Cr20Ni30
Main Chemical composition	Ni	Rest	Rest	55.0-61.0	34.0-37.0	30.0-34.0
	Cr	20.0-23.0	28.0-31.0	15.0-18.0	18.0-21.0	18.0-21.0
	Fe	≤1.0	≤1.0	Rest	Rest	Rest
Max continuous service temp(C)		1200	1250	1150	1100	1100
Resistivity at 20C (μΩm)		1.09	1.18	1.12	1	1.04
Density(g/cm3)		8.4	8.1	8.2	7.9	7.9
Thermal conductivity (KJ/mhC)		60.3	45.2	45.2	43.8	43.8
Coefficient of lines expansion(α10-6/C)		18	17	17	19	19
Melting point approx.( C)		1400	1380	1390	1390	1390
Elongation at rupture(%)		>20	>20	>20	>20	>20
Micrographic structure		Austenite	Austenite	Austenite	Austenite	Austenite
Magnetic properties		Nonmagnetic	Nonmagnetic	Weak magnetic	Weak magnetic	Weak magnetic