Nichrome 40 (UNS N08330 / W.Nr. 1.4864)

Nichrome 40 (UNS N08330 / W.Nr. 1.4864) is an austenitic nickel-chromium alloy for use at temperature up to 1100℃. The alloy is characterized by high resistivity and good oxidation resistance. It has good ductility after use and excellent weldability.

Equivalent Grades

Trademark	GB	GOST	ASTM	UNS	DIN	W.Nr.	NF	BS	JIS	SS
Nikrothal 40 Resistohm 40	Cr20Ni35	–	35Ni-20Cr	N08330	–	1.4864	–	–	NCHW3 NCHRW3	–

Chemical Composition, %

Alloy	C	Si	Mn	P	S	Cr	Ni	Al	Fe
Nichrome 40	≤0.08	1.0-3.0	≤1.00	≤0.020	≤0.015	18.0-21.0	34.0-37.0	–	Bal

Mechanical Properties (RT, Annealed)

Tensile Strength, Rm/MPa	Elongation, A/%
Tensile Strength, Rm/MPa	Dia. >3.00mm (Wire) Thk. >0.20mm (Strip)	Dia. 0.10-3.00mm (Wire) Thk. ≤0.20mm (Strip)
≥600	≥25	≥20

Physical Properties

Max Working Temp., ℃	Melting Point, ℃	Density, g/cm3	Resistivity, μΩ·m 20℃	Specific Heat, J/(g•K)	Thermal Conductivity, W/(m•K) 20℃	Average Coefficient of Thermal Expansion,α×10-6/℃ 20-1000℃	Micrographic Structure	Magnetic Properties
1100	1390	7.90	1.04	0.50	13	19.0	Austenitie	Non-Magnetic

Life Test

Test Temperature, ℃	Continuous Service Time Hours, ℃
1100	≥80

Temperature Factor of Resistivity

20℃	100℃	200℃	300℃	400℃	500℃	600℃	700℃	800℃	900℃	1000℃	1100℃	1200℃	1300℃
1.000	1.029	1.061	1.090	1.115	1.139	1.157	1.173	1.188	1.208	1.219	1.228	–	–

Available Products and Specifications

Rod, Bar, Wire and Forgings	GB/T 1234-2012, ASTM B344-01, JIS C2520-1999,
Plate, Sheet and Strip	GB/T 1234-2012, ASTM B344-01, JIS C2520-1999
Pipe and Tube	–
Welding Product	–
Others	–