General Description

NW 450T  is a Ni-Cr-Ti alloy wire designed for arc spraying. This alloy produces dense, well-bonded coatings with excellent corrosion resistance and good wear resistance. It produces coatings which are extremely resistant to corrosive vanadium and sulfur gases in boiler atmospheres.

Equivalent to:


Metco 8500

Typical Applications

The coatings of NW 450T wire is used to protect boiler tubes in thermal power plant such as water cooling tube, superheater tube, reheater tube and economizer tube from oxidation and sulfidation against high temperature.

It also proven to be particularly effective as a protective arc spray coating for boiler tubes in black liquor recovery boilers and coal fired utility boilers.

Chemical Composition

Grade Ni% Cr% Ti% C% Mn% Fe% S% Si% Cu% P%
NW 450T Bal. 41.0-45.0 0.3-1.0 0.01-0.1 Max 0.2 Max 0.5 Max 0.015 Max 0.2 Max 0.5 Max 0.02

Typical Deposit Characteristics

Typical Hardness: 30-35 HRC

Bond Strength: 7000 psi

Deposit Rate: 10 lbs /hr/100A

Deposit Efficiency: 85%

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