Best in Class Hardfacing Technologies

Kennametal Stellite is the leader in Plasma Transferred Arc (PTA) hardfacing which produces thick claddings from a high-energy plasma arc. By utilizing this cladding process Stellite’s customers optimize performance, reduce costs, improve reliability and extend the lifespan of critical assets and components.

Kennametal Stellite’s PTA equipment is used in a range of industries, including automotive, oil & gas, power generation, mining and general engineering. This equipment enables these industries to leverage the exceptional properties of Stellite’s alloy families for wear and corrosion protection.

PTA Equipment Products

Plasma Transferred Arc Welding & Hardfacing

PTA hardfacing, also known as Plasma Transferred Arc hardfacing, is a versatile welding overlay process used to deposit wear & corrosion-resistant coatings. The process involves the use of a high-energy plasma arc to melt and fuse a hardfacing material onto the substrate.

Kennametal Stellite PTA cladding systems deposit metallurgically bonded, fully-dense coatings, which deliver outstanding performance in some of the most aggressive wear and corrosive environments. The choice of hardfacing material and process parameters in PTA hardfacing can be tailored to meet specific application requirements, allowing for customized solutions to address wear and erosion challenges in various industries.

ABB robot arm

Advantages of PTA Hardfacing

  • Easily Automated
  • True metallurgical bond to the substrate
  • 0.25” to 0.160” thick claddings in a single pass
  • Minimal dilution
  • Uniform cladding hardness and chemistry 
  • Smooth weld bead
  • High deposition rates (up to 13 kgs/hr)
  • Precision monitoring of feedstocks
  • Application flexibility in a variety of industries
  • Over 300 cladding formulations & chemistries
Starweld 400 with 20ft Beam and Carriage


The Starweld 400 welding system is the most versatile PTA system on the market today. The 400 system can be successfully integrated with a wide range of part and torch manipulation equipment, including standard posts and beams, robot positioners, or in some cases, existing PTA manipulation platforms. This system provides a highly consistent, reliable, and cost-effective means for cladding and coating operations.

Starweld MicroStar


Kennametal Stellite MicroStar tools are a self-contained, hand-held PTA hardfacing system. MicroStar tools are ideal for a wide range of unique hardfacing applications. These systems are designed to meet the various repairing and hardfacing demands for a multitude of applications. Each MicroStar unit is engineered as a portable and robust system with hand-held deposition capability. 



Kennametal Stellite PTA systems remain at the forefront of engine valve performance and service life. The Kennametal ValveStar PTA setup is designed for the automatic PTA hardfacing of automotive engine valves. The ValveStar is routinely used by the automotive market to hardface the sealing surfaces of engine valves to boost fuel efficiency and engine life.


Spare Parts and Services

The one successful ingredient that will optimize the benefit of your hardfacing operations is the support you will receive from Kennametal Stellite. We offer world-class calibration, torch rebuilding, maintenance and spare parts packages for all of our PTA consoles to keep them running at peak performance.

Learn More About Spare Parts and Services

Thermal Spray & Hardfacing Powders

With over 100 years of proven performance, Kennametal Stellite is known as the worldwide material solution for wear, heat and corrosion applications. Through decades of engineering and optimization, we offer one of the most comprehensive portfolios of PTA powders on the market. 

Learn More About Thermal Spray and Hardfacing Powders

PTA Starweld Equipment Brochure

Check out our brochure for additional information on Starweld PTA equipment.

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Welding & Hardfacing Consumables Brochure

Check out our brochure for additional insights and data on Stellite alloys.

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