Stellite Welding and Hardfacing Services
at Greno Industries

Stellite welding and hardfacing are essential processes for extending the life of components exposed to extreme wear, heat, corrosion, and impact. At Greno Industries, Stellite hardfacing plays a critical role in supporting customers in power generation, defense, heavy equipment, and industrial machinery—markets where component failure can be costly, dangerous, or catastrophic. While MIG, TIG, and Stick welding support structural fabrication, Stellite welding provides a specialized solution for surfaces that must withstand the harshest operating environments.

Stellite is a family of cobalt‑chromium alloys engineered for exceptional wear resistance, high‑temperature strength, and corrosion protection. These alloys are widely used in turbine components, valve seats, cutting tools, and high‑wear industrial surfaces. Hardfacing with Stellite dramatically improves component longevity, reduces downtime, and enhances performance under extreme service conditions.

What Is Stellite Welding and Hardfacing?

Stellite hardfacing is the process of applying a layer of cobalt‑based alloy onto a metal surface to improve its resistance to wear, abrasion, galling, corrosion, and high‑temperature degradation. The process can be performed using TIG welding, MIG welding, PTA (Plasma Transferred Arc), or oxy‑fuel methods depending on the application and alloy selection.

Key characteristics of Stellite alloys include:

• Exceptional wear resistance

• High hardness (typically 38–60 HRC)

• Outstanding corrosion and oxidation resistance

• Superior performance at elevated temperatures

• Resistance to galling and metal‑to‑metal contact

These properties make Stellite one of the most reliable solutions for components that operate in harsh or abrasive environments.

Stellite Welding & Hardfacing at Greno Industries

Greno Industries integrates Stellite welding and hardfacing into its machining and fabrication workflow to support components that require:

• Extreme wear protection

• High‑temperature performance

• Corrosion and oxidation resistance

• Extended service life under heavy loads

• Protection against galling and metal‑to‑metal wear

Greno’s technicians apply Stellite using controlled welding procedures that ensure proper dilution, bead profile, and metallurgical bonding. Because Stellite alloys are sensitive to heat input and dilution, Greno’s welders maintain precise control over amperage, travel speed, and preheat requirements to ensure consistent, high‑quality results.

Applications Across High‑Demand Industries

Power Generation

Stellite is widely used in turbine blades, valve seats, wear rings, and high‑temperature components that must resist erosion, corrosion, and thermal fatigue. Hardfacing extends component life and reduces maintenance cycles.

Defense and Military

Components exposed to abrasion, impact, and extreme heat—such as weapon system parts, armored components, and high‑wear mechanical interfaces—benefit from Stellite’s durability and metallurgical stability.

Heavy Equipment

Cutting edges, loader buckets, crusher components, and hydraulic wear surfaces often require Stellite overlays to withstand abrasive materials and heavy mechanical loads.

Industrial Machinery

Stellite hardfacing is used on shafts, bearings, pump components, and sealing surfaces where galling, friction, and wear must be minimized.

Why Stellite Hardfacing Matters at Greno

Stellite welding enhances Greno’s ability to deliver complete, ready‑to‑install components by providing a specialized surface‑engineering solution that complements the company’s machining and welding capabilities.

Key advantages include:

• Significantly extended component life

• Reduced downtime and maintenance costs

• Improved performance in abrasive or corrosive environments

• Enhanced reliability for mission‑critical components

• Ability to restore worn parts to like‑new condition

For customers who operate in high‑wear or high‑temperature environments, Stellite hardfacing provides a cost‑effective way to improve durability and reduce total lifecycle costs.

Quality Control and Process Reliability

Greno’s Stellite welding and hardfacing operations follow industry‑recognized best practices, including:

• Proper joint and surface preparation to ensure strong metallurgical bonding

• Controlled heat input to prevent cracking or excessive dilution

• Alloy selection based on wear mechanism (abrasion, galling, corrosion, erosion)

• Multi‑pass techniques for thick overlays or complex geometries

• Post‑weld machining to achieve precise dimensions and surface finish

• Inspection and verification to ensure overlay integrity and uniformity

These controls ensure that every Stellite‑coated component meets the performance requirements of its intended application.

Stellite Welding & Hardfacing FAQs

What is Stellite welding used for at Greno Industries?

Stellite welding is used to protect components from extreme wear, heat, corrosion, and galling. It is commonly applied to turbine parts, valve seats, cutting tools, and high‑wear industrial surfaces.

What materials can be hardfaced with Stellite?

Stellite can be applied to carbon steel, stainless steel, alloy steels, nickel alloys, and other high‑strength materials.

How does Stellite hardfacing differ from standard welding?

Standard welding joins metals, while Stellite hardfacing applies a wear‑resistant alloy layer to improve surface performance and extend component life.

Why choose Stellite for high‑wear applications?

Stellite offers exceptional hardness, high‑temperature strength, and resistance to abrasion, corrosion, and galling—making it ideal for extreme service environments.

Can worn components be rebuilt using Stellite?

Yes. Stellite hardfacing can restore worn surfaces to like‑new condition, often improving durability beyond the original design.

Does Greno offer prototype and production hardfacing?

Absolutely. Greno supports one‑off repairs, custom overlays, and full‑scale production hardfacing with consistent quality across all parts.