Thermal Spray Wire
Nickel Base Alloys

Polymet manufactures the highest quality wire in the world for both twin wire arc spray and flame spray operations. Polymet produces over 35 alloys for thermal spray applications. Below is a full list of Thermal Spray Wire Nickel Base Alloys offered by Polymet.

PMET # Competitor equivalents DESCRIPTION
PMET 806 Tafa 06T Nickel
PMET 818 Tafa 78T, Metco 8718 Alloy 718
PMET 821 Tafa 06C Ni 20Cr
PMET 860 Tafa 71T, Metco 8625 Alloy 625
PMET 860BC Alloy 625 + Boron Carbide
PMET 876 Tafa 77T, Metco 8276 Alloy C-276
PMET 877 Tafa 70T Monel
PMET 884 Tafa 79B, Metco 405 Ni 20Al
PMET 885 Tafa 75B, Metco 8400 Ni 5Al
PMET 886 Tafa 73MXC, Metco 8443 Ni Cr Al
PMET 887 Tafa 76MXC Ni Cr Al Y
PMET 888 Tafa 74MXC, Metco 8447 Ni Mo Al
PMET 889 Tafa 45CT Ni Cr Ti

PMET 806

Characteristics and Composition

PMET 806 is a high purity nickel wire specifically designed for arc spraying. PMET 806 produces dense, well-bonded coatings with excellent machineability, electrical conductivity and corrosion resistance. It is widely used for machine element repair applications requiring high corrosion resistance.

Equivalent to:

TAFA 06T

Rockwell Hardness 55-60 B   Diameter (in)-1/16, (mm)-1.6

Ni
99.0

PMET 818

Characteristics and Composition

PMET 818 is a solid wire specifically designed for arc spray systems. It produces a self-bonding nickel-chromium-molybdenum deposit with excellent high temperature oxidation and corrosion resistance. PMET 818 can be used for dimensional restoration of parts.

GE B50TF202 specification approval

Equivalent to:

TAFA 78T

Sulzer Metco 8718

Rockwell Hardness 25-30 C   Diameter (in)-1/16, (mm)-1.6

NiCoFeCrWMoAlSi
Bal9.5143.81.63

PMET 821

Characteristics and Composition

Polymet offers a Nichrome Equivalent – PMET 821 (Ni-20Cr) in thermal spray wire form. This alloy produces dense, well bonded coatings that are resistant to high-temperature oxidation and corrosion.

Equivalent to:

TAFA 06C
Rockwell Hardness 85-95 B   Diameter (in)-1/16, (mm)-1.6

CrNi
20.0Bal

PMET 860

Characteristics and Composition

PMET 860 is a high purity nickel chrome wire specifically designed for arc spraying. It produces dense, well-bonded coatings with resistance to corrosion, and stress cracking in caustic mediums.

Equivalent to:

TAFA 71T

Sulzer Metco 8625

Rockwell Hardness 90-95 B   Diameter (in)-1/16, (mm)-1.6

NiCrMoFeCb+Ta
62.52210.02.03.5

PMET 860BC

Characteristics and Composition

CrBMoSiFeCNi
31.04.03.02.52.02.0Bal

PMET 876

Characteristics and Composition

PMET 876 is a high purity nickel-chrome-moly-tungsten (Alloy C-276) wire specifically designed for arc spraying. It produces dense, well-bonded coatings with good resistance to corrosion, and stress cracking in caustic, acidic and chloride mediums. It’s high hardness makes it very resistant to abrasion and metal wear.

Equivalent to:

TAFA 77T

Sulzer Metco 8276

Rockwell Hardness 30-40 C   Diameter (in)-1/16, (mm)-1.6

CrMoFeWNi
15.016.05.04.0Bal

PMET 877

Characteristics and Composition

PMET 877 is specifically designed for spraying in arc spray and flame spray systems. It produces well-bonded coatings with excellent machineability. PMET 877 has good corrosion resistance, especially in sea water and caustic environments.

Equivalent to:

TAFA 70T

Rockwell Hardness 80-85 B   Diameter (in)-1/16, 1/8, (mm)-1.6, 3.2

CuMnFeNi
31.031.01.7Bal

PMET 884

Characteristics and Composition

PMET 884 is a cored wire specifically designed for either arc spraying or flame spraying. It is self-bonding to most materials and requires minimal surface preparation. Bond strengths in excess of 9000 psi can be achieved on grit blasted surfaces. PMET 884 exhibits good resistance to high temperature oxidation and abrasion, and excellent resistance to impact and bending. PMET 884 can be machined and ground to a finish of 5 micro inches.

Equivalent to:

TAFA 79B

Sulzer Metco 405

Rockwell Hardness 60-80 B   Diameter (in)-1/16, 1/8, (mm)-1.6, 3.2

AlNi
20.0Bal

PMET 885

Characteristics and Composition

PMET 885 is a solid wire specifically designed for arc spray systems. It is self-bonding to most materials and requires minimal surface preparation. Bond strengths in excess of 9000 psi can be achieved on clean smooth surfaces. Roughening of the surface by machining, grit blasting or grinding can increase the bond strength up to 10,000 psi. PMET 885 exhibits good resistance to high temperature oxidation and abrasion, and excellent resistance to impact and bending. PMET 885 can be machined and ground to a finish of 5 micro inches. It is a self-bonding, one step material and is also suitable for the build-up and dimensional restoration of nickel-based alloys. PMET 885 is widely used as a bond coat for subsequent thermal spray topcoats and as a one step build up material for dimensional restoration of aircraft engines.

Equivalent to:

TAFA 75B

Sulzer Metco 8400

GE B50TF56 & PWA 36937 specification approvals

Rockwell Hardness 65-85 B   Diameter (in)-1/16, (mm)-1.6

NiAlOther
93.04.0-5.51.7 max

PMET 886

Characteristics and Composition

PMET 886 is a cored wire specifically designed for arc spray systems. It produces a self-bonding nickel-chromium-aluminum deposit with excellent high temperature oxidation and corrosion resistance. PMET 886 can be used for dimensional restoration of parts and is widely used in aircraft repair market. The coating can be used as an undercoat for ceramics.

Equivalent to:

TAFA 73MXC

Sulzer Metco 8443

Rockwell Hardness 65-85 B   Diameter (in)-1/16, (mm)-1.6

CrAlNi
207.0Bal

PMET 887

Characteristics and Composition

PMET 887 is a NiCrAlY cored wire specifically designed for arc spray systems. It produces dense, well bonded coatings with excellent high temperature oxidation and corrosion resistance to 1800° F (980° C). It can be used to prevent oxidation of low alloy steels and as an undercoat for ceramics. The coating is machineable.

Equivalent to:

TAFA 76MXC

Rockwell Hardness 75-85 B   Diameter (in)-1/16, (mm)-1.6

CrAlYNi
22.010.01.014

PMET 888

Characteristics and Composition

PMET 888 is a nickel aluminum molybdenum cored wire specifically designed for arc spraying. It produces dense, well-bonded coatings with excellent wear resistance and good corrosion resistance. It is widely used for machine element repair, dimensional restoration and wear resistance applications.

Equivalent to:

TAFA 74 MXC

Sulzer Metco 8447

Rockwell Hardness 75-85 B   Diameter (in)-1/16, (mm)-1.6

AlMoNi
5.55.0Bal

PMET 889

Characteristics and Composition

PMET 889 is a nickel chrome titanium wire specifically designed for arc spraying. It produces dense, well-bonded coatings with excellent corrosion resistance and good wear resistance. It is highly resistant to sulfur and vanadium atmospheres up to 1825° F. It has proven to be particularly effective as a protective arc spray coating for boiler tubes in black liquor recovery boilers and coal fired utility boilers.

Equivalent to:

TAFA 45 CT

Rockwell Hardness 30-35 C   Diameter (in)-1/16, (mm)-1.6

CrTiNi
43.00.756.3