Surfacing Welding – The Ultimate FAQ Guide

It’s not an uncommon thing for parts or components to be worn out; this is why surfacing welding is one of the most relevant types of welding available.

In this guide, we’ll be discussing everything you need to know about surfacing welds.

You’ll be able to find out many things about surfacing welding; from the different types, applications, and many more!

What is Surfacing Welding?

Surfacing welds are welds that you use on surfaces for the purpose of replacement.

What is Surfacing Welding
Surfacing welding performed on a part of a construction equipment

Usually, you’ll perform it on surfaces that have been worn-out by time, environment, or specific situations.

What are Some Examples of Surfacing Welding?

Imagine that you have a business in the construction sector and you use a bulldozer.

Examples of Surface Welding
Repairing/Restoring a bucket via surface welding

As you can imagine, both the conveyor belt and the bucket are two (2) of the most used parts. Therefore, they’re the most susceptible to wear.

By performing surfacing welding, you’ll be able to cover up and/or replace the metal on the surfaces that have already been worn out.

Top Methods of Surfacing

There are a lot of many different methods you can abide by to perform surfacing welds.

Top Methods of Surfacing
Plasma Arc Welding Surfacing

Here are the top known methods of surfacing you can choose for your project:

  • Furnace Fusing
  • Submerged Metal Arc Welding (SMAW) Surfacing
  • Oxy-Acetylene Surface Welding
  • Gas Metal Arc Welding (GMAW) Surfacing
  • Flux-Cored Arc Welding (FCAW) Surfacing
  • Gas Tungsten Arc Welding (GTAW) Surfacing
  • Plasma Arc Surfacing
  • Submerged Arc Welding (SAW) Surfacing

As you may have noticed, it’s not that far from what regular welding or hardfacing is.

Akin to how you perform hard surfacing, you can utilize various methodologies in making sure that your parts or components are kept safe and sound.

Definition of a Fillet Weld

A fillet weld is one of the most popular types of weld in existence.

Definition of a Fillet Weld
Fillet weld example since two metals are joined perpendicularly

It’s the procedure of joining or fusing two (2) or more pieces of metal together while they’re at an angle or at a perpendicular position.

Fillet welds are also commonly referred to as tee joints because of the position of the weld you’ll have to.

Parts of a Fillet Weld

You’ll be able to know about surfacing welding more if you know the parts of a fillet weld.

Here are the parts of a fillet weld:

Actual Throat

The actual throat is known to be the distance in between the face of a fillet weld and the face and the root.

Effective Throat

This throat is the minimum distance subtracted from the reinforcement between the fillet weld as well the root and the face.

Theoretical Throat

Lastly, this throat is the minimum distance minus the reinforcement between the fillet weld, as well as the joint root and the face.


This is the surface of the weld on the side from that is exposed, from which the welding was done.


This is the distance from the root to the toe of the weld from the joint.


The toe is the junction of the base metal and the face of the weld.

Those are the parts of a fillet weld, which might be relevant in learning about surfacing welds.

Surfacing Weld Symbol

Welding symbols are the things that distinguish the position and the sides of a joint using the arrow, as well as the spaces below and above the reference line.

The symbol of the surfacing weld is an arrow lying horizontally; with two half circles running across the line.

Apart from surface welding, there are other symbols you can distinguish to help you determine the particular welding type or method.

You can refer to the image above for the various kinds of welding symbols.

 What is Intermittent Welding?

Intermittent welding is exactly what you think it is.

Intermittent Welding
Visual representation of what an intermittent weld is

It’s the kind and type of weld that is neither continuous nor ran across a straight line.

You usually use and perform intermittent welding when a continuous weld endangers the joint through warping. Alternatively, you can also choose to utilize it if a continuous weld is not important or necessary.

What is a Spot Weld?

A spot weld or spot welding is a type of welding where two (2) or more metal sheets are joined.

What is a Spot Weld
An example of how a spot weld is done using two (2) metal sheets

You can use it if you don’t want any filler material used in the process. In spot welding, you usually use the heat generated to fuse or join the workpieces together.

What are Practical Applications of Surface Welding?

Since surface welding is most known for restoration, you can use it in many applications.

Practical Applications of Surfacing Welding
Practical application of how surfacing welding can help you

Some of the most practical applications of surface welding include:

  • Restoration of worn-out workpieces and parts
  • Rehabilitation of corroded or abrasion-stricken materials
  • Extend the lifespan or service life of machines and equipment
  • Minimize the damage dealt to parts

Those are some of the most practical applications of surface welding. There are a lot more, but that will depend on the circumstances and situations you are in.

Industries That Use Surfacing Welds

Many industries and business sectors seek surfacing welding for their parts and components.

Industries that Use Surfacing Welds

Surfacing welding done on a structural machine

But, the most common industries are those that are engaged in the following:

  • Manufacturing Sector
  • Farming Sector
  • Construction and Structural Sectors
  • Coal and Mining Sector
  • Shipyard and Shipbuilding Sectors
  • Petrochemical and Chemical Sectors
  • And Many More!

These aren’t just the industries or the sectors that use surfacing welding; there are a lot more!

Different Types and Classifications of Surfacing in Welding

Surfacing is a vague term; that’s why many experts categorized it into different classifications.

Classifications of Surfacing in Welding
An image of how a buildup weld is done

These types and classifications include:


Hardfacing is the type of surface welding where a stronger material is deposited to a workpiece.

The purpose is to change up the properties of the base metal, which then enhances its strength, durability, and resistance.


Buildup is the addition of weld metal to a surface, joint, or a prior weld of a base metal.

The main purpose of building up is to restore worn-out layers or sides of a workpiece.

Weld Cladding

Cladding is not far from what hardfacing is. However, the goal of cladding is to apply elements or components that are corrosion-resistant.


Lastly, buttering is a surfacing type where a metal without the similar properties are deposited.

You can understand it better as the deposition of alloys with high nickel content onto alloyed steel.

These are the different types of surfacing in the welding industry. There are a lot more. However, these methods are known to be the original.

What are the 5 Basic Types of Welding Joints?

Since surfacing welding is an application of weld metal onto a flat or an angled surface, you need to understand the different types and kinds of welding joints.

5 Basic Types of Welding Joints
An image of how an edge weld (edge joint) is done

The five (5) basic welding joints are:

Edge Joints

This type of welding joint is when the metal surfaces are placed together with their edges even.

Either one or both plates can be formed via bending them at a particular angle.

You want edge joints to minimize the stress that the plates experience.

Corner Joints

More commonly done in sheet metals, corner joint welding is a type of position where the corners of each metal is welded to one another.

You can easily remember them because they form at an angle via welding the workpieces at the “corner.”

Butt Joints

In this type of welding joint, the two (2) pieces of metal are welded together in the same plane.

Many welders consider butt joint welding as the most common type of joint in the pipe and fitting, as well as the fabrication industry.

Lap Joints

A lap joint weld is somehow a modification of a butt joint weld.

Usually, lap joints are formed when two (2) pieces of metal are welded on top of one another in an overlapping sense.

Tee Joints

In its simplest definition, a tee joint weld is a type of weld where the workpieces form a letter “T.”

You’d weld them where the two workpieces would meet at a 90-degree perpendicular angle. Usually, you’ll weld a straight plate to a wide rectangular plate, placing the former in the middle.

By knowing these types of welding joints, you won’t ever find it hard to distinguish or perform surfacing welding.

Benefits of Surfacing Welds

Surface welding is one of the best types of welding processes out there.

You can utilize it effectively and efficiently, especially if you’re aware of these benefits:

  • Longer time for your parts and components to function
  • Save up on costs for replacement/repair
  • Allot fewer workers/people on certain procedures and processes
  • Reduction or decrease in the downtime of machines/equipment
  • Increase and heighten efficiency and effectiveness of operations
  • And many more!

Surfacing welding is something you would want to perform in under many circumstances. Unlike the traditional welding procedure, your goal isn’t only to fuse or join workpieces together – your goal would be to improve or develop a certain base metal.

Surfacing Welding for the Construction Sector

If you’re in the construction sector or industry, you’ll find surface welding efficient in many different ways, such as:

  • Restoring excavator buckets
  • Adjusting and reinforcing the lining or certain parts
  • Strengthen or develop the life expectancy of certain components
  • Decrease the rate of wear in machine parts and equipment
  • And many more!

How Can Surfacing Welding be Effective for the Mining Industry?

The mining industry involves a lot of work and effort. So, if you’re in this industry, surfacing welds can benefit you a lot!

You can use it to increase the abrasion resistance of your drills, to strengthen the capacity of force or impact, reinforce railing, and etc.

What Machines Can You Use for Surfacing Welds?

There are many different types of surface welding machines you can use for your project.

Depending on the outcome and the result you want would be the particular machine. Some of the most common surfacing welding equipment include:

  • Pipe hardfacing equipment
  • PTA or plasma transferred arc welding equipment
  • One or two heads hard surfacing machines and equipment
  • Valve hardfacing machines
  • Plate PTA hard surfacing machines
  • And many more!

Who Can You Trust With Surface Welding?

China is among the countries you can fully bank on when it comes to welding.

There literally are hundreds of great manufacturers of surfacing welding plates, pipes, and equipment in the country.

Over the years, though, Waldun has topped and dominated the list consecutively. We’ve beaten all our other competitors through the skill, advancements, and the innovation we have.

Why Trust Waldun With Surfacing Welding?

In our time in the industry, never did we fail to meet the needs and the demands of our clients.

From providing samples of surface welding outputs – to the manufacturing of machines, Waldun always had the number one spot.

You can trust us here at Waldun when it comes to surfacing welding because:

  • We employ a Research & Development (R&D) team to specify the products you need
  • You can get the exact type of surfacing welds and hardfacing machines you require
  • We can give you a free sample of our products (not with machines)
  • We offer a lifetime of support for the equipment we manufactured
  • All your orders will arrive within 2 to 3 weeks from the date of order

Don’t hesitate to contact us here at Waldun for the surfacing welding needs you have for your business.

We will always be ready and prepared to give you high quality output and machines – all for a competitive rate!

Contact us and tell us the exact specifications you need for the product you require!