Industrial Hardfacing & Welding Wire

Our industrial product line consists of nickel and cobalt-based alloys. We manufacture both solid and cored-wires. These products are widely used for hardfacing in the valve, lumber, and mining industries.

PMET # Trade Name Specification
PolyStel 1 Cobalt Alloy 1 AWS A5.21 & AWS A5.13: ERCCoCr-C, ERCoCr-C, ECoCr-C
PolyStel 6 Cobalt Alloy 6 AWS A5.21& AWS A5.13: ERCCoCr-A, ERCoCr-A, ECoCr-A
PolyStel 12 Cobalt Alloy 12 AWS A5.21& AWS A5.13: ECCoCr-B, ERCoCr-B, ECoCr-B
PolyStel 12H Cobalt Alloy 12 High Carbon
PolyStel 21 Cobalt Alloy 21 AWS A521 & AWS A5.13: ERCCoCr-E, ERCoCr-E, ECoCr-E

PolyStel 1

COBALT ALLOY 1 – AWS A5.21 & AWS A5.13: ERCCoCr-C, ERCoCr-C, ECoCr-C

Characteristics and Composition

Metal Cored PolyStel 1 is a cobalt-based metal cored wire. It produces a deposit that exhibits excellent abrasion and corrosion resistance for applications where severe abrasion and moderate impact is encountered. PolyStel 1M contains a higher percentage of carbides than deposits from PolyStel 6 and PolyStel 12 which contribute to the exceptional wear resistance and superior hardness of this alloy. PolyStel 1M derives its high temperature hardness and matrix toughness from the addition of tungsten. Due to the high sensitivity to check cracking, when welding this alloy proper precautions should be made to minimize cooling stresses. This alloy can be applied to any weldable steel, including all grades of stainless steel.

Solid PolyStel 1 is an excellent high temperature wear resistance alloy consisting of a rich cobalt matrix with a high degree of chromium and tungsten carbides. The alloy is excellent when used in high temperature abrasive wear applications. It can also be specified in a number of different corrosive medias such as down hole sour gas applications.

PolyStel 1 Coated Electrodes form a low carbon, austenitic deposit with excellent work hardening properties, high temperature strength, and impact resistance. Some common applications for PolyStel 1 coated electrodes include:

  • Wear pads
  • Mixer Rotors
  • Pump sleeves
NiCoFeCrWMoAlSi
Bal288
MnNbTiTaZrCOther

PolyStel 6

COBALT ALLOY 6 – AWS A5.21& AWS A5.13: ERCCoCr-A, ERCoCr-A, ECoCr-A

Characteristics and Composition

Metal Cored PolyStel 6 is a cobalt-based metal cored wire, equivalent in nominal chemical composition, physical properties, and performance properties to the Stellite 6 brand of cobalt-based metal cored wire. Cobalt alloy 6 is considered the principal cobalt alloy in terms of versatility and resistance to many forms of mechanical and chemical deterioration over an extensive temperature range. PolyStel 6 (Stellite 6 equivalent) attributes its outstanding self-mated anti-galling properties to the high alloy content of the matrix, namely the chromium carbides contained in the deposit. Popular applications for this alloy include hardfacing applications when wear is complimented by corrosion and/or elevated temperatures such as valve seats and bearing areas. This alloy an be applied to any weldable steel, including all grades of stainless steel.

Solid PolyStel 6 is designed for high temperature applications. PolyStel 6 provides excellent wear resistance in abrasion as well as in metal to metal applications. Wear resistance is provided by the complex chromium and tungsten carbides that are supported in a rich cobalt matrix. PolyStel 6 is also resistant to oxidation up to its melting range and can be satisfactorily specified in sour gas as well as other corrosive applications.

PolyStel 6 cast rods and coated electrodes are also comparable to the Stellite 6 brand products in terms of chemistry, properties and performance. Popular SMAW applications include: shear blades, fluid flow valves, extrusion screws, roll bushings, valve bearing surfaces, and other applications where high temperatures are experienced.

PolyStel products are manufactured and sold by Polymet Corporation. Stellite brand products are manufactured and sold by Kennametal, Inc. Polymet Corporation and Kennametal, Inc. are not affiliated and Kennametal does not endorse PolyStel products.

NiCoFeCrWMoAlSi
Bal325
MnNbTiTaZrCOther
1.2

PolyStel 12

COBALT ALLOY 12 – AWS A5.21& AWS A5.13: ECCoCr-B, ERCoCr-B, ECoCr-B

Characteristics and Composition

Metal Cored PolyStel 12 is a cobalt-based metal cored wire. PolyStel 12 is equivalent in nominal chemical composition, physical properties, and performance properties to the Stellite brand. PolyStel 12 cored wire meets AWS A5.21 ERCCoCr-B. It is considered an intermediate between PolyStel 6 and PolyStel 1. PolyStel 12 has a higher hardness and better resistance to all types of wear, including galling, due to the large fraction of hard, brittle chromium carbides. This alloy’s high-temperature properties (up to 1292°F) are derived from the alloy’s higher tungsten content. PolyStel 12 is mainly used in applications that require the deposit to endure abrasion, heat, and corrosion such as knife cutting edges for the timber, paper, and plastics industry. This alloy can be applied to any weldable steel, including all grades of stainless steel.

Solid PolyStel 12 is a cobalt-based care cast rod version of Cobalt Alloy 12 that has been hot forged into small diameter wire, using Polymet’s hot extruded wire process. PolyStel 12 has excellent resistance to many forms of chemical and mechanical degradation over a wide temperature range. PolyStel 12 attributes are its anti-galling properties, abrasion, corrosion resistance, and oxidation resistance up to its melting range. It can be applied to all weldable steels, including stainless steels.

ECCoCr-B, ERCoCr-B, ECoCr-B

PolyStel products are manufactured and sold by Polymet Corporation. Stellite brand products manufactured and sold by Kennametal, Inc. are not affiliated and Kennametal does not endorse PolyStel products.

NiCoFeCrWMoAlSi
Bal298
MnNbTiTaZrCOther
1.5

PolyStel 12H

Characteristics and Composition

PolyStel 12H is a high carbon cobalt-based cast rod version of Cobalt Alloy 12 that has been hot forged to a small diameter wire using Polymet’s patented hot extruded wire processing. PolyStel 12H attributes are its anti-galling properties and increased abrasion resistance while maintaining similar properties to those of Cobalt Alloy 12. It can be applied to all weldable steels, including stainless steels.

NiCoFeCrWMoAlSi
Bal299
MnNbTiTaZrCOther
1.9

PolyStel 21

COBALT ALLOY 21 – AWS A521 & AWS A5.13: ERCCoCr-E, ERCoCr-E, ECoCr-E

Characteristics and Composition

PolyStel 21 has excellent resistance to many forms of chemical and mechanical degradation over a wide temperature range. PolyStel 21 is an excellent alloy for corrosion resistance, galling, cavitation, and metal to metal wear resistance. PolyStel 21 products are equivalent in nominal chemical compositions, physical properties, and performance properties to the Stellite brand. PolyStel 21 products meet the requirements of AWS A 5.21 ERCCoCr-E, ERCoCr-E, and ECoCr-E.

PolyStel products are manufactured and sold by Polymet Corporation. Stellite brand products manufactured and sold by Kennametal, Inc. are not affiliated and Kennametal does not endorse PolyStel products.

NiCoFeCrWMoAlSi
Bal295
MnNbTiTaZrCOther
PMET # DESCRIPTION Specification
POLYWEAR 50 Ni Cr Si B AWS A5.21 ERCNiCr-B
POLYWEAR 60 Ni Cr Si B AWS A5.21 ERCINiCr-C

POLYWEAR 50

NiCoFeCrWMoAlSi
Bal3.5133.7
MnNbTiTaZrCOther
0.62.5

POLYWEAR 60

NiCoFeCrWMoAlSi
Bal4.5144
MnNbTiTaZrCOther
0.7
PMET # Description Specification
POLYTUNG NIBWC Ni B WC
POLYTUNG NICRBWC Ni Cr B WC
POLYTIC-O Fe Cr Ti C
POLYTUNG-O Fe W Si C
POLYVAN-O Fe V W C Si

POLYTUNG NIBWC

Characteristics and Composition

POLYTUNG NiBWC is a high quality tungsten carbide metal cored wire ideal for protecting your equipment in the harshest environments. When welded this material has excellent fine particle erosion and corrosion resistance. POLYTUNG NiBWC will increase the life of your parts, reducing downtime and increasing productivity.

Applications for POLYTUNG NiBWC include: drill bits and stabilizers, dredge cutter teeth & heads, mud pumps, and other applications in a variety of industries.

POLYTUNG is a nickel silicon boron matrix system with WC particles. This combination produces a superior microstructure when welded.

Tungsten carbide hardfacing wire - GMAW

POLYTUNG NiBWC micrograph taken at 200X magnification

NiCoFeCrWMoAlSi
Bal40-454
MnNbTiTaZrCOther
0.33B 3

POLYTUNG NICRBWC

Characteristics and Composition

POLYTUNG NiCrBWC is a nickel chrome boron silicon matrix system, with 38-44% tungsten carbide particles. This combination produces a superior micro-structure when welded and has excellent fine particle erosion, corrosion and toughness. The low heat input when welding POLYTUNG NiCrBWC reduces the amount of tungsten carbide particles going into solution. Deposits are not machinable and can not be flame cut.

NiCoFeCrWMoAlSi
Bal1040-453
MnNbTiTaZrCOther
1.6

POLYTIC-O

Characteristics and Composition

POLYTIC O is an iron-based metal cored wire designed to produce weld deposits containing evenly dispersed titanium carbides, in a martensitic matrix. POLYTIC Oexhibits excellent abrasion resistance, while maintaining toughness and impact resistance. It is best suited in applications with high stress and abrasion. POLYTIC O can be applied crack free, with proper procedures. Deposits are not machinable and can not be flame cut.

NiCoFeCrWMoAlSi
Bal81.50.8
MnNbTiTaZrCOther
1.52Ti 5.5

POLYTUNG-O

Characteristics and Composition

POLYTUNG O is a self shielding hardfacing wire with tungsten carbide particles in a high hardness iron matrix that provides excellent wear resistance for earth engaging tools and other high wear applications.

NiCoFeCrWMoAlSi
Bal38-60
MnNbTiTaZrCOther

POLYVAN-O

Characteristics and Composition

POLYVAN O is an iron based metal cored wire, designed to produce weld deposits containing vanadium tungsten carbides. These carbides form during solidification of the weld puddle, and are evenly dispersed throughout a tough austenitic matrix. POLYVAN O’s wear resistance is higher than that of chromium carbide but less than tungsten carbide. POLYVAN O can be applied in multiple layers and on applications up to 900° F. Deposits are not machinable and cannot be flame cut.

NiCoFeCrWMoAlSi
Bal6.00.41.4
MnNbTiTaZrCOther
0.83.9
PMET # description Specification
POLYCHROME 100 Fe Cr C Mn Si
POLYCHROME 100C Fe Cr C Mn Mo Si
POLYCHROME 100D Fe Cr C Mn Si

POLYCHROME 100

Characteristics and Composition

POLYCHROME 100 is an iron- based high chromium carbide metal cored wire, designed for metal to metal earth applications with severe abrasion and light to moderate impact. POLYCHROME 100 develops a fine cross check pattern and is used for a wide range of applications in the crushing, grinding, and construction industry. Deposits are normally limited to two layers. Deposits cannot be machined or flame cut.

NiCoFeCrWMoAlSi
Bal231
MnNbTiTaZrCOther
25

POLYCHROME 100C

Characteristics and Composition

POLYCHROME 100 C—an iron based high chromium carbide metal cored wire, designed for metal to earth applications with severe abrasion and light to moderate impact. POLYCHROME 100C develops a fine cross check pattern and is used for a wide range of applications in the crushing, grinding and construction industry. A unique attribute of POLYCHROME 100C is that it can be applied in multiple layers using stringer beads and special procedures (contact Polymet for more information). This process is used to refurbish coal and cement pulverizer rolls and rings. Deposits are normally limited to two layers, and cannot be machined or flame cut.

NiCoFeCrWMoAlSi
Bal2511.1
MnNbTiTaZrCOther
24.5

POLYCHROME 100D

NiCoFeCrWMoAlSi
Bal290.8
MnNbTiTaZrCOther
1.75