Good Performance Nicr AA Heating Strip for Air Heaters

• Material: Nicr
• Application: Furnance
• Type: Wire
• Surface Treatment: Polishing
• Status: Soft State
• Condition: Bright, Annealed
• Model NO.: NiCr AA
• Special Use: for Air Heaters
• Composition: 80%Nickel, 20%Chromium
• Brand: Ualloy
• Product Name: Good Performance Nicr AA Heating Strip for Air Hea
• Transport Package: in Coils, Paper or Woven Bags, Woodencase
• Specification: GB/T 1234-12
• Trademark: Ualloy
• Origin: China
• HS Code: 75052200
• Production Capacity: 500tons/Year

Product Description

Good performance NiCr AA heating strip for air heaters

NiCr AA,especially for American market

Nichrome's metallurgical structure confers them a very good plasticity when cold.

There is a growth of the grain under heat during utilisation of the element without inducing embrittlement of it when cold.

They are used for the manufacture of electric resistances for appliances (insulated elements type tubular resistances or for example opened elements on micanit plate) or for application of industrial furnaces.

In addition of a relatively high specific resistance, Ni-Cr alloys join all the necessary properties for good performances in use of furnaces: Resistance to oxidation (they are not sensitive to aggressions of humid air).

Low embrittlement at high temperature. Good plasticity-Easier to give them a shape compared with FeCrAl (lower mechanical characteristics allow indeed a good control of elasticity of the product during shaping (coiling, folding, drawing).

Good resistance to creeping (more important than ferritic alloys) which is important during conception of a resistance presenting big heights of waves. Maximal temperature recommended in the furnace: 1922/2012F in order to obtain a reasonable life time of the elements.

Chemical Composition and Main Properties of Nichrome
Properties \ Grade		NiCr 80/20	NiCr 70/30	NiCr 60/15	NiCr 35/20	NiCr 30/20
Main Chemical Composition	Ni	Balance	Balance	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	Balance	Balance	Balance
Max Continuous Service Temperature(oC)		1200	1250	1150	1100	1100
Resisivity 20oC  (Ω mm2/m)		1.09	1.18	1.12	1.04	1.04
Density (g/cm3)		8.4	8.1	8.2	7.9	7.9
Thermal Conductivity(KJ/m@ h@ oC)		60.3	45.2	45.2	43.8	43.8
Coefficient of Thermal Expansion(α × 10-6/oC)		18	17	17	19	19
Melting Point( oC)		1400	1380	1390	1390	1390
Elongation(%)		> 20	> 20	> 20	> 20	> 20
Micrographic Structure		austenite	austenite	austenite	austenite	austenite
Magnetic Property		nonmagnetic	nonmagnetic	nonmagnetic	Weak magnetic	Weak magnetic