GAS TURBINE HARDFACING & WELDING WIRE
Cobalt Base Alloys

Polymet’s gas turbine hardfacing & welding wire product line offers hardfacing Cobalt Base Alloys once thought impossible to produce. Below is a full list of Gas Turbine Hardfacing & Welding Wire Cobalt Base Alloys offered by Polymet.

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