Not all welding is about joining two components.
In many industries, welding is also used to restore, protect, strengthen, and extend the service life of critical equipment. This is where surfacing techniques play a vital role.
Selecting the right surfacing method can significantly improve equipment reliability, reduce maintenance costs, and increase operational life.
1. Buttering
A layer of weld metal is deposited before final welding to prepare the joint, especially for dissimilar metals.
Typical Applications:
✔ Stainless steel to carbon steel joints
✔ Transition welds
✔ Dissimilar metal welding
✔ Reducing dilution and preventing cracking
2. CRA (Corrosion Resistant Alloy) Surfacing
A corrosion-resistant alloy is overlaid onto the base metal to protect it from aggressive environments.
Common Applications:
✔ Oil & Gas processing equipment
✔ Pressure vessels
✔ Pipelines
✔ Valves and heat exchangers
✔ Chemical processing plants
3. Hardfacing
A wear-resistant alloy is deposited to improve resistance against abrasion, erosion, impact, and metal-to-metal wear.
Typical Applications:
✔ Mining equipment
✔ Crusher components
✔ Earthmoving machinery
✔ Agricultural equipment
✔ Cutting edges and tools
4. Build-Up Welding
Used to restore worn or damaged components back to their original dimensions before machining.
Typical Applications:
✔ Shafts
✔ Pump sleeves
✔ Bearing seats
✔ Rollers
✔ Dies and molds
✅ Key Benefits of Surfacing
• Extends equipment service life
• Reduces replacement costs
• Improves wear and corrosion resistance
• Minimizes downtime
• Restores dimensional accuracy
• Enhances productivity and reliability
• Supports sustainable maintenance by repairing instead of replacing components
Choosing the correct surfacing technique—and the appropriate welding consumable—is essential for achieving the required performance, service life, and cost efficiency.
Which surfacing process do you use most in your projects—Buttering, CRA Overlay, Hardfacing, or Build-Up Welding?
Post time: Jul-16-2026