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wire  16.jpg
Strip  31.jpg
Bar  104.jpg

FeCrAl Cr21Al16Nb wire bar strip

  • Place of Origin Jiangsu,China
  • Model Number FeCrAl Cr21Al16Nb
  • Trade Names Cr21Al16Nb
  • Dimensions Customized Size
  • Delivery Conditions Grinding, Polished, Bright.
  • Avaliable Shapes Bar,Tube,Pipe,Wire,Strip,Ring,.Customized
  • MOQ 50~200 (KG)
  • Packaging Details Wooden Case, or as per Client's request
  • Payment Terms L/C, T/T, Western Union, MoneyGram
  • Trade Terms FOB, CIF, DUP, EXW
  • Delivery Time 7~45 days

Overview

 

0Cr21Al6Nb is a high-resistance electric heating alloy, belonging to the iron-chromium-aluminum alloy system. It features high electrical resistivity, excellent oxidation resistance, and good creep resistance, making it suitable for manufacturing electric heating elements in high-temperature environments. The alloy forms a dense Al2O3 oxide film at high temperatures, effectively preventing oxidation and corrosion, with a maximum operating temperature of up to 1100°C. Additionally, it has a low temperature coefficient, allowing it to maintain stable resistance values at different temperatures.

 

 

 

Limiting Chemical Composition, %

 

Chromium..............................................................................................................................................................................21.0--23.0 

Aluminum..................................................................................................................................................................................5.0--7.0

Carbon.....................................................................................................................................................................................0.05 Max.

Nickel........................................................................................................................................................................................0.60 Max.

Silicon.......................................................................................................................................................................................0.60 Max.

Manganese.............................................................................................................................................................................0.70 Max.

Phosphorus...........................................................................................................................................................................0.025 Max.

Sulfur.......................................................................................................................................................................................0.025 Max.

Niobium...................................................................................................................................................................................0.50

Iron...............................................................................................................................................................................................Balance.

 

 

 

Physical Constants

 

Density

7.1 g/cm³

Resistivity

1.45 μΩ·m

Tensile strength

≥650 Mpa

Bending frequency

>5

Melting piont

1500℃

Elongation

>10%

 

 

 

Characteristic

 

High resistivity: Suitable for resistance heating elements at high temperatures.
Excellent oxidation resistance: forming a dense Al2O3 oxide film at high temperature, effectively preventing oxidation and corrosion.
Good creep resistance: the addition of niobium improves the creep resistance and high temperature strength of the alloy.
Low temperature coefficient: The resistance value changes little with temperature, and the temperature coefficient is 0 ~ -0.01%/℃.
Metallographic structure: ferrite structure.

 

 

Application

 

Electric heating element: widely used in electric furnace heating element, electric heat pipe, electric heating wire, etc.
Industrial heating equipment: such as heat treatment furnace, stainless steel annealing furnace, etc.
Melting device: Used to manufacture melting crucible, furnace, furnace and so on.

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