Aerospace

Polymet was founded in 1967 as a small consulting firm servicing the aerospace industry and quickly grew into a pioneer of the gas turbine hardfacing and welding world. Through a proprietary hot extrusion process, we are able to manufacture very hard alloys with little ductility in small diameter wire form. Applications in the aerospace industry require this small diameter, high performance wire for critical assembly and repair processes. A number of our thermal spray products are also used in this industry for wear and corrosion resistance coatings, abrasion resistance, and high temperature resistance.

We are a company certified to current ISO standards and hold quality approvals and certifications from industry leaders such as General Electric, Pratt & Whitney, Rolls Royce, and Honeywell. Our commitment to quality along every step of the manufacturing process, from raw materials to finished goods, is unparalleled.

Through our dedication to quality, we are able to manufacture high performance wire that will extend product life, increase product efficiency, and decrease operating costs by providing the most superior product on the market.

Polymet offers both nickel and cobalt hot extruded based alloys to supply the industry with the quality wire they need. Our gas turbine hardfacing and welding wire ranges from 0.012” – 0.093” in diameter and may be spooled or cut to specific lengths. These products are suitable for laser welding, GTAW, plasma welding, hot wire TIG, and GMAW. Thermal spray products include aluminum, nickel, zinc, and molybdenum based alloys. They are available in 0.062” and 0.125” diameter forms.

PRODUCTS FOR THIS MARKET

PMET # Trade Name Specification
PMET 802 Mar M 002
PMET 811 GTD 111 B50A880
PMET 818 Alloy 718 AMS 5832, A5.14 ERNiFeCr-2
PMET 820 Rene 220 B50TF239, PCC 1-59-02.061
PMET 823 GTD 222 B50A940, B50TF311
PMET 838 Inconel® 738 B50TF250, PWA 1495
PMET 839 Inconel® 939 B50TF250, PWA1495
PMET 842 Rene 142 B50TF274, MSRR 9500/247
PMET 845 C 242 MSRR 9500/17
PMET 847 Mar M 247 EMS 55447
PMET 854 Haynes® 230® AMS 5839, A5.14 ERNiCrWMo-1
PMET 860 Alloy 625 AMS 5837, A5.14 ERNiCrMo-3
PMET 863 C-263 B50A783, AMS 5966
PMET 865 Waspaloy® AMS 5828, MSRR 9500/202
PMET 870 Hastelloy® W AMS 5786, A5.14 ERNiMo-3
PMET 875 Hastelloy® X AMS 5798, A5.14 ERNiCrMo-2
PMET 880 Rene 80 B50TF259

PMET 802

Mar M 002 welding wire. Used for gas turbine engine structural components.

NiCoFeCrWMoAlSi
Bal1.008.59.55.5
MnNbTiTaZrCOther
2.22.80.02

PMET 811

B50A880 – GTD 111® welding wire for gas turbine engine components

NiCoFeCrWMoAlSi
Bal9.5143.81.63
MnNbTiTaZrCOther
4.92.80.020.1

PMET 818

AMS 5832 – Inconel 718® welding wire for gas turbine engine components

NiCoFeCrWMoAlSi
Bal18193.050.5
MnNbTiTaZrCOther
5.10.90.05

PMET 820

B50TF239 – Rene 220® welding wire for gas turbine engine frames & casings.

NiCoFeCrWMoAlSi
Bal12193.20.5
MnNbTiTaZrCOther
5.313.30.03

PMET 823

B50A940 – GTD 222® welding wire for gas turbine engine components.

NiCoFeCrWMoAlSi
Bal1922.521.2
MnNbTiTaZrCOther
2.310.05

PMET 838

B50TF191 – Inconel 738® welding wire for gas turbine engine blades and vanes.

NiCoFeCrWMoAlSi
Bal8.5162.61.83.4
MnNbTiTaZrCOther
0.93.41.80.060.7

PMET 839

B50TF250 – Inconel 939® welding wire for gas turbine engine blades & vanes.

NiCoFeCrWMoAlSi
Bal1922.521.9
MnNbTiTaZrCOther
13.71.40.10.15

PMET 842

B50TF274 – Rene 142 welding wire for gas turbine engine vanes.

NiCoFeCrWMoAlSi
Bal11.86.84.91.56.1
MnNbTiTaZrCOther
6.30.122.8 Re. 1.2 Hf

PMET 845

MSRR 9500/17 – C 242 welding wire for gas turbine engine vanes.

NiCoFeCrWMoAlSi
Bal1020.510.30.3
MnNbTiTaZrCOther
0.30.3

PMET 854

Alloy 230 – AMS 5839

NiCoFeCrWMoAlSi
56.022.014.02.00.350.5
MnNbTiTaZrCOther
0.650.10

PMET 860

AMS 5837 – Inconel 625® welding wire for gas turbine engine blades.

NiCoFeCrWMoAlSi
MnNbTiTaZrCOther

PMET 863

B50A783 – Hastelloy C-263® welding wire for gas turbine engine frames & casings.

NiCoFeCrWMoAlSi
MnNbTiTaZrCOther

PMET 865

AMS 5828 – Waspaloy ® welding wire for gas turbine engine casings.

NiCoFeCrWMoAlSi
Bal13.519.54.21.4
MnNbTiTaZrCOther
3.10.070.06

PMET 870

AMS 5786 – Hastelloy W® welding wire for gas turbine engine hot section components.

NiCoFeCrWMoAlSi
Bal5.5524.5
MnNbTiTaZrCOther

PMET 875

AMS 5798 – Hastelloy X® welding wire for gas turbine engine combustors.

NiCoFeCrWMoAlSi
Bal1.518.521.80.69
MnNbTiTaZrCOther
0.1

PMET 880

B50TF259 – Rene® 80 welding wire for gas turbine engine blades.

NiCoFeCrWMoAlSi
Bal9.5143.93.93.1
MnNbTiTaZrCOther
50.10.17
PMET # Trade Name Specification
PMET 905 L-605 (Alloy 25) AMS 5796, MSRR 9500/23
PMET 906 Alloy 6 AMS 5788, MSRR 9500/19, A5.21 ERCoCr-A
PMET 909 Mar M 509 B50TF89, PWA 1185, CROM RT 5027 B35
PMET 912 Alloy 12 MSRR 9500/228, A5.21 ERCoCr-A
PMET 913 Alloy 12H MSRR 9500/15
PMET 914 FSX 414 B50A823
PMET 918 Mar M 918 B50A824, AMS 5814
PMET 921 Alloy 21 AMS 5835, A5.21 ERCoCr-E
PMET 931 Alloy 31 AMS 5789, MSRR 9500/25
PMET 972 Merl 72 PWA 795, MSRR 9500/248
PMET 980 T-800® B50TF193, DMR 34.071
PMET 988 Alloy 188 AMS 5801
PMET 994 CM 64 B50TF55, PWA 694, MSRR 9500/226, DMR 34.070

PMET 905

AMS 5796 – L 605® welding wire for gas turbine hot section components.

NiCoFeCrWMoAlSi
10Bal2015
MnNbTiTaZrCOther
1.50.1

PMET 906

AMS 5788 welding wire for pump shafts, pump sleeves, and valve seats.

NiCoFeCrWMoAlSi
BAL28.54.8
MnNbTiTaZrCOther
1.2

PMET 909

B50TF89-PWA 1185 – Mar M 509® welding wire for gas turbine engine blades and vanes.

NiCoFeCrWMoAlSi
10BAL23.67
MnNbTiTaZrCOther
0.23.50.40.6

PMET 912

MSRR 9500/228 – Alloy 12 welding wire for hardfacing of lumber saw blades and cutting tools.

Characteristics and Composition

PMET 912 is a solid cobalt 12 wire. PMET 912 has excellent resistance to many forms of chemical and mechanical degradation over a wide temperature range. PMET 912 attributes are its anti-galling properties, abrasion and corrosion resistance, and oxidation resistance up to its melting range. It can be applied to all weldable steels, including stainless steels.

Specifications

  • MSRR 9500/225
  • AWS A5.21 ERCoCr-B

Deposit Characteristics

  • Abrasion Resistance – High
  • Impact Resistance – High
  • Corrosion Resistance – High
  • Hardness – HRC 43-47
  • Hot Wear Hardness – High

Applications

  • Saw teeth
  • Ball mill guide rollers
  • Chipping knives
  • Digester rotary feeder
  • Burner tips
  • Turbine blades
  • Sewage, rendering, and oil extraction screws
NiCoFeCrWMoAlSi
BAL2.5298
MnNbTiTaZrCOther
1.5
Rockwell Hardness
44-50 C

PMET 913

MSRR9500/115 – Alloy 12 H welding wire for gas turbine engine components.

Characteristics and Composition

PMET 913 is a high carbon cobalt based version of cobalt alloy 12 that has been forged into small diameter wire using Polymet’s patented hot extruded wire process. PMET 913 attributes are its anti-galling properties and increased abrasion resistance while maintaining similar properties to the alloy #12. It can be applied to all weldable steels, including stainless steels.

Specifications

  • MSRR 9500/15
NiCoFeCrWMoAlSi
BAL28.59
MnNbTiTaZrCOther
1.9
Rockwell Hardness
45-54 C

PMET 914

B50A823 – FSX 414 LC Welding wire for nozzle guide vane repair of land-based gas turbines

NiCoFeCrWMoAlSi
MnNbTiTaZrCOther

PMET 918

B50TF824, AMS5814, Turbaloy® 918, Mar M 918 welding wire for gas turbine vanes.

Characteristics and Composition

PMET 918 (Turbaloy® 918) is a cobalt-based high temperature alloy. Chromium and nickel are major alloying elements.  It is used to repair parts that have endured severe thermal cycling.

Specifications

  • AMS 5814
  • Mar M 918
  • B50A824

Typical Deposit Characteristics

  • Excellent high temperature strength
  • Galling resistant

Applications

  • Gas turbine engine components
  • Casting repair
NiCoFeCrWMoAlSi
20BAL20
MnNbTiTaZrCOther
7.50.07

PMET 921

AMS 5835 – Alloy 21 welding wire for gas turbine components.

NiCoFeCrWMoAlSi
2.75BAL275.6
MnNbTiTaZrCOther
0.3
Rockwell Hardness
25-35 C

PMET 931

AMS 5789 – Alloy 31 welding wire for gas turbine engine blades.

NiCoFeCrWMoAlSi
10.5BAL25.37.50.7
MnNbTiTaZrCOther
0.70.51
Rockwell Hardness
21-57 C

PMET 972

PWA 795 – Merl 72® welding wire for gas turbine engine blades.

NiCoFeCrWMoAlSi
15BAL2094.4
MnNbTiTaZrCOther
0.230.351.5

PMET 980

B50TF193 – Tribaloy® T-800 welding wire for gas turbine engine blades.

Characteristics and Composition

PMET 980 (Tribaloy® T-800) is a solid hardfacing wire consisting of cobalt, molybdenum, chromium, and silicon. PMET 980 attains its oxidation, corrosion, and galling resistance from its hard laves phase which is dispersed in a softer solid solution eutectic.

Specifications

  • B50TF193
  • DMR 34.071

Mechanical Properties

  • Tensile strength – less than 70,000 PSI
  • Elongation – Nil
  • Hardness – 52-62 HRC

Applications

  • PMET 980 has found acceptance in a number of applications where galling, abrasion, oxidation, and corrosion are a problem. Applications include pump shaft sleeves, computer hard drives, gas turbine blade shrouds and bases.
NiCoFeCrWMoAlSi
BAL17.528.83.5
MnNbTiTaZrCOther

PMET 988

AMS 5801 – HS 188® welding wire for gas turbine engine hot section components.

NiCoFeCrWMoAlSi
22BAL322150.4
MnNbTiTaZrCOther
0.11.1

PMET 994

B50TF55 – PWA 694 – CM64 welding wire for gas turbine engine blades.

Characteristics and Composition

PMET 994 (PWA 694) is a solid cobalt hardfacing wire. PMET 994 provided high strength and stability at temperatures up to 2100° F. Deposits of PMET 994 have outstanding resistance to wear, erosion, creep, thermal fatigue, and oxidation.

Specifications

  • PWA 694
  • B50TF55
  • MSR 9500/226
  • DMR 34.070

Typical Deposit Characteristics

  • Abrasion Resistance – Good
  • Corrosion Resistance – Good
  • Erosion Resistance – Good
  • Impact Resistance – Fair-poor
  • Hardness – 47-54 HRC

Applications

  • Gas turbine blades – shroud interlocking surface and other sites of wear.
NiCoFeCrWMoAlSi
MnNbTiTaZrCOther
Rockwell Hardness
47-54 C

PMET 747

347 SS – AMS 5680

Characteristics and Composition

NiCoFeCrWMoAlSi
11.0Bal18.0
MnNbTiTaZrCOther
1.00.06
PMET # Competitor equivalents DESCRIPTION
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 899 Sprabond Molybdenum

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 899

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