General Description

NW CrAl6 is a Fe-Cr-Al steel alloyed with rare earth elements which has high oxidation resistance at high temperatures. Due to the high contents of aluminium and chromium in combination with rare earth elements (Lanthanum, Yttrium, Cer, Hafnium, etc. …), NW CrAl4 has good mechanical properties, thermal stability, thermal conductivity and oxidation resistance against high temperature.


NIWIRE developed NW CrAl6 foil and metal fiber production by reroll strip to thickness 30μm thickness and bundle draw 0.5mm wire to 8μm metal fiber.

NW CrAl6 foil is used to making metallic substrate for catalytic converts and diesel particle filters in automotive exhaust systems. Also used as heating material for cooking plates and ceramic hobs.

NW CrAl6 metal fiber can be used to making Diesel Particulate Filter (DPF), Sintered Metal Filters and Metal Fiber Burners.

Chemical Composition

Grade C% Si% Fe% Cr% Al% Other%
NW CrAl6 Max 0.03 Max 0.4 Bal. 20 5.0-6.0 0.04%-1%

Physical Properties

Density: 7.2 g/cm3

Max Working Temperature: 1300°C

Melting Point: 1500 °C

Specific Resistance (at 20°C) (µΩ-m): 1.4±0.07

Linear Expansion Coeff. (T=20 – 1000°C) x10-6 : 14.0

Mechanical Properties

0.1mm thickness hard condition

Tensile: Min 950 MPa

Yield: Max 1300 Mpa

Elongation: Max 2%

Hardness: Min 300 HV

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