Lumber

Polymet’s industrial hardfacing and welding wires for the lumber industry have been engineered with one purpose in mind: efficiency. Polymet’s 100% dense, solid PolyStel product line utilizes the proprietary hot extrusion process to produce continuous spools of wire suitable for automated gas tungsten arc welding and plasma welding processes. This spooled PolyStel wire enables the customer to set up and automate the welding process. Welding automation has advantages such as reduced downtime due to switching out rod, diminished excess labor, and minimized waste of consumables. Polymet also manufacturers small diameter PolyStel wire for TIG welding on ultra-thin kerf blades. This results in a more precise weld, eliminating the possibility of excess heat on the blade that causes warping. Welding PolyStel wire onto saw blade applications improves surface finishes and permits significantly longer operational times.

The PolyStel products are cobalt alloys with a high chromium and tungsten percentage. PolyStel products are available in continuous cast rod (3.2mm and up), extruded rod (0.9mm and up), and extruded spooled wire (0.9mm – 2.0mm). Please see the product offers for this industry below:

PRODUCTS FOR THIS MARKET

Cobalt Hardfacing Wire

PMET #	Trade Name	Specification
PolyStel 1	Cobalt Alloy 1	ERCoCr-C
PolyStel 12	Cobalt Alloy 12	ERCoCr-B

PolyStel 1

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

Details

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

Ni	Co	Fe	Cr	W	Mo	Al	Si
	Bal		28	8

Mn	Nb	Ti	Ta	Zr	C	Other

PolyStel 12

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

Details

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.