WP Green Pure Tungsten Electrode (EWP) for AC TIG Welding

INWELT WP Pure Tungsten Electrodes | Green Tip | AWS EWP | TIG Welding Consumables

The INWELT WP Green Pure Tungsten Electrode is an unalloyed tungsten electrode designed primarily for traditional AC TIG (GTAW) welding of aluminum, magnesium and their alloys.

Identified by its green color marking, the WP electrode contains no intentionally added metal oxides and is classified as WP under ISO 6848 and EWP under AWS A5.12.

Pure tungsten electrodes are particularly associated with conventional transformer-based AC welding systems, where a rounded or balled electrode tip is traditionally used.

The INWELT catalog lists 17 diameter-and-length combinations in 150 mm and 175 mm lengths, supporting different TIG torch configurations and industrial purchasing requirements.

INWELT welcomes inquiries from welding consumable distributors, importers, wholesalers, OEM brands and industrial welding suppliers.

What Is a WP Green Pure Tungsten Electrode?

A WP tungsten electrode is a commercially pure, unalloyed tungsten electrode used to conduct welding current and maintain the arc during TIG welding.

Unlike thoriated, lanthanated or ceriated electrodes, WP contains no intentionally added oxide alloying ingredients.

It is identified by a green color band and is widely recognized as a traditional electrode option for AC TIG welding of aluminum and magnesium.

What Does WP Mean in Tungsten Electrodes?

WP is the ISO classification designation for pure tungsten electrodes.

The equivalent AWS classification is EWP.

• WP: Pure tungsten electrode classification

• EWP: AWS designation for pure tungsten electrodes

• Green Tip: Identification color for pure tungsten

• Principal Oxide: None intentionally added

• Typical Welding Current: Alternating Current (AC)

• Typical Base Metals: Aluminum, magnesium and their alloys

WP is a tungsten electrode classification and should not be confused with WP-series TIG torch model names.

Why Are Pure Tungsten Electrodes Marked Green?

Green is the standard identification color associated with WP/EWP pure tungsten electrodes.

The color marking helps welding operators and purchasing teams distinguish pure tungsten from other common electrode types, such as blue lanthanated, red thoriated and white zirconiated tungsten.

For industrial purchasing, the electrode color should be supported by the correct classification, product label and applicable documentation.

WP Pure Tungsten Electrode Technical Specifications

Technical Note: The composition and classification information describes the WP/EWP electrode type. Exact tungsten purity, dimensional tolerances, product certificates and batch inspection results should be confirmed from the actual supplied material.

WP Green Tungsten Electrode Sizes

The WP pure tungsten electrode catalog includes two lengths and multiple diameter options for different TIG welding equipment and purchasing specifications.

WP Pure Tungsten Electrode Diameter Options

The catalog-listed diameters are:

1.0 mm / 1.6 mm / 2.0 mm / 2.4 mm / 3.0 mm / 3.2 mm / 4.0 mm / 4.8 mm / 6.4 mm

The 6.4 mm diameter is listed for 175 mm length only.

What Is the Difference Between 150 mm and 175 mm Tungsten Electrodes?

Both lengths can be used in suitable TIG welding torch assemblies.

The correct length depends on the torch configuration, back-cap design, electrode projection and purchasing requirements.

The 175 mm length is widely used in industrial TIG electrode supply, while 150 mm may be appropriate when a shorter rod is specified.

Confirm the complete electrode arrangement before ordering.

WP Green Tungsten Electrode Packaging Options

The supplied catalog records a Pack value of 10 for the listed WP electrode specifications.

INWELT can evaluate purchasing inquiries involving catalog packaging, bulk quantities and customer-specific packaging requirements.

The actual number of rods per pack and available packaging configurations should be confirmed before the order is finalized.

Key Features of WP Green Pure Tungsten Electrodes

Pure Tungsten Without Intentional Oxide Additives

WP electrodes are manufactured from commercially pure tungsten without intentionally added rare-earth or thorium oxide compounds.

They provide an established electrode option for TIG welding procedures that specifically call for pure tungsten.

Traditional Balled-Tip Performance for AC TIG Welding

Pure tungsten is known for forming a rounded or balled electrode tip under conventional AC welding conditions.

This characteristic has historically made WP a common choice for traditional AC TIG welding of aluminum and magnesium.

The tip should be maintained within the limits recommended for the welding equipment and procedure.

Suitable for Conventional Transformer-Based TIG Welders

WP electrodes are particularly relevant to conventional transformer-based AC TIG machines operating at suitable welding currents.

Their performance should not be assumed to match that of modern oxide-alloyed tungsten electrodes on all power sources.

Thorium-Free Electrode Composition

WP electrodes contain no intentionally added radioactive thorium.

They may be selected when a welding procedure specifies pure tungsten or when customers prefer to avoid thoriated electrodes.

General welding fume and grinding dust precautions still apply.

Multiple Sizes for Welding Consumable Distribution

The WP catalog provides 17 size combinations across 150 mm and 175 mm lengths.

This allows distributors to identify specific electrode sizes, maintain structured catalog records and organize repeat purchasing.

What Is WP Green Tungsten Used For?

WP pure tungsten electrodes are primarily associated with traditional AC TIG welding applications.

Pure Tungsten for Aluminum TIG Welding

Pure tungsten is traditionally used for AC TIG welding of aluminum and aluminum alloys.

In conventional balanced-wave AC welding, the electrode may form a rounded tip while supporting the arc characteristics required by the welding procedure.

Typical applications may include:

• Aluminum component fabrication

• Aluminum sheet and plate welding

• General aluminum workshop repairs

• Aluminum equipment maintenance

• Aluminum alloy assemblies

Pure tungsten is not automatically the best electrode for every aluminum welding application.

Modern AC inverter TIG machines often work better with suitably selected lanthanated or ceriated electrodes.

WP Tungsten for Magnesium TIG Welding

WP electrodes can also be used for conventional AC TIG welding of magnesium and certain magnesium alloys.

Electrode selection must follow the welding machine requirements, material specification and established welding procedure.

Traditional AC TIG Welding Equipment

Green pure tungsten may be selected when maintaining or operating older transformer-type AC TIG systems.

For distributors, this creates a specific replacement-consumable application where existing welding procedures or equipment manuals call for pure tungsten electrodes.

Can WP Green Tungsten Be Used for Stainless Steel?

WP is not generally the preferred electrode for DC TIG welding of stainless steel.

For stainless steel, carbon steel and other common DC TIG welding applications, electrode types such as WL20, WC20 or WT20 may be better suited, depending on the procedure.

How to Choose the Right WP Tungsten Electrode

Step 1: Identify the TIG Welding Power Source

Determine whether the welding machine uses traditional transformer-based AC output or modern inverter-based AC output.

Pure green tungsten is most commonly associated with conventional transformer AC equipment.

For modern inverter machines, consult the equipment manufacturer's electrode recommendations.

Step 2: Confirm the Base Metal

WP is primarily selected for traditional AC TIG welding of aluminum, magnesium and their alloys.

Do not select the electrode based on color alone. The base metal and welding procedure should always be checked.

Step 3: Select the Correct Tungsten Diameter

The electrode diameter must be suitable for the welding current, AC balance, electrode tip geometry and TIG torch arrangement.

This chart describes general sizing considerations, not guaranteed amperage ranges. Current capacity depends on waveform, polarity, electrode preparation and equipment specifications.

Step 4: Check the TIG Torch Collet and Back Cap

Ensure that the tungsten diameter matches the collet and its compatible collet body or gas lens.

Also confirm whether the selected 150 mm or 175 mm rod can be accommodated by the torch and back-cap arrangement.

Step 5: Check Electrode Tip Preparation

Pure tungsten electrodes are commonly associated with a balled-tip configuration in traditional AC welding.

However, tip preparation requirements vary with the power source, current waveform and welding procedure.

A large or unstable electrode ball can negatively affect arc control and increase the possibility of tungsten contamination.

Step 6: Evaluate Alternative Tungsten Types

If the welding application requires better arc initiation, greater current capacity, reduced electrode erosion or improved inverter compatibility, consider another tungsten classification.

WP Green vs. WL20 Blue vs. WZ8 White Tungsten Electrodes

Selecting the correct tungsten electrode depends on more than its identification color.

WP vs. WL20: Which Is Better for Aluminum Welding?

WP green tungsten has historically been used for AC aluminum welding with conventional transformer-type equipment.

WL20 blue tungsten is a 2% lanthanated electrode suitable for a broad range of AC and DC TIG applications.

For many modern AC inverter TIG machines, WL20 is often a more versatile choice.

The correct electrode should be selected according to the welding machine manufacturer's recommendations and the welding procedure.

WP vs. WZ8: What Is the Difference?

WP is commercially pure tungsten without intentionally added oxide alloying ingredients.

WZ8 contains approximately 0.8% zirconium oxide and is identified by a white tip.

WZ8 is commonly selected for AC TIG welding, especially applications where resistance to electrode contamination and stable AC performance are important.

WP vs. WT20: Which Tungsten Should You Choose?

WP green tungsten is primarily associated with traditional AC welding of aluminum and magnesium.

WT20 red tungsten contains approximately 2% thorium oxide and is primarily selected for DC TIG welding of materials such as carbon steel and stainless steel.

WT20 contains radioactive thorium, while WP does not contain intentionally added thorium.

These electrodes are not interchangeable for every welding procedure.

How to Prepare and Maintain Pure Tungsten Electrodes

Inspect the Electrode Before Welding

Before installation, inspect the electrode for:

• Visible cracks or damage

• Surface contamination

• Incorrect diameter

• Damaged identification color

• Excessive tip erosion

• An unstable or oversized rounded tip

Maintain the Correct Electrode Tip

For traditional AC TIG welding, WP electrodes commonly develop a balled tip.

Maintain the tip according to the welding power source and procedure requirements.

Avoid allowing the rounded end to become excessively large or unstable.

Prevent Tungsten Contamination

If the electrode contacts the weld pool or filler metal, stop and inspect it before continuing.

A contaminated electrode can affect arc stability and may introduce defects into the weld.

Follow Safe Electrode Preparation Practices

Use appropriate electrode preparation equipment and follow normal welding safety procedures.

Prevent inhalation of grinding dust, keep consumables clean and use suitable eye and respiratory protection where required.

Although WP does not contain intentionally added thorium, safe grinding and dust-handling practices remain necessary.

Wholesale WP Pure Tungsten Electrodes for Distributors

INWELT welcomes procurement inquiries for WP green tungsten electrodes and related TIG welding consumables.

Potential customers include:

• Industrial welding consumable distributors

• Welding equipment importers

• Welding supply wholesalers

• TIG torch manufacturers

• OEM and private-label brands

• Industrial equipment maintenance suppliers

• Aluminum fabrication workshops

• Industrial end users

Bulk WP Tungsten Electrode Purchasing

Industrial buyers can request quotations based on the required electrode diameter, length, quantity and packaging.

For customers already using green WP tungsten electrodes, the catalog reference code can help identify the required size.

OEM and Private-Label Tungsten Electrode Packaging

INWELT can evaluate project inquiries involving:

• Customer-brand packaging

• Distributor labels

• Product identification stickers

• Barcode requirements

• Diameter and length markings

• Bulk-order packaging

• Private-label packaging artwork

The final packaging specifications, minimum order quantity and customization feasibility require confirmation.

Tungsten Electrode Quality and Technical Documentation

For industrial purchasing, customers should confirm their required technical documentation before ordering.

Depending on the project, relevant documents may include:

• Electrode classification information

• Chemical composition reports

• Dimensional inspection results

• Batch identification

• Safety Data Sheet

• Packaging specifications

• Applicable conformity documentation

Specific certification or testing requirements should be confirmed with INWELT rather than assumed from the product classification.

Frequently Asked Questions About WP Green Tungsten Electrodes

What is a WP tungsten electrode?

WP is the ISO classification for a pure tungsten electrode. Its AWS designation is EWP, and it is identified by a green color marking.

What is green tungsten used for?

Green pure tungsten is traditionally used for AC TIG welding of aluminum, magnesium and their alloys, especially with conventional transformer-based welding equipment.

Is WP the same as EWP?

WP is the ISO classification, and EWP is the corresponding AWS designation for pure tungsten electrodes.

Is green tungsten good for aluminum welding?

Yes, particularly for traditional AC TIG welding with transformer-based power sources. For modern AC inverter welders, other tungsten types such as WL20 may offer better performance.

Can pure tungsten electrodes be used for DC welding?

Pure tungsten can operate under certain DC conditions, but it is generally not preferred for DC TIG welding because oxide-alloyed electrodes often provide better arc starting and electrode performance.

Is WP pure tungsten radioactive?

WP contains no intentionally added thorium or other radioactive oxide additives. It is generally classified as a non-radioactive tungsten electrode.

Why does green tungsten form a ball?

Under conventional AC TIG welding conditions, heat at the electrode tip can cause pure tungsten to form a rounded or balled end. The size and stability of this tip depend on the welding current and waveform.

What is the difference between WP and WL20 tungsten?

WP is pure tungsten with a green identification color and is primarily associated with traditional AC welding. WL20 contains approximately 2% lanthanum oxide, has a blue tip and is suitable for a broad range of AC/DC TIG applications.

What sizes are listed for INWELT WP tungsten electrodes?

The catalog includes 150 mm and 175 mm electrodes. Listed diameters range from 1.0 mm to 6.4 mm, depending on the selected length, with 17 diameter-and-length combinations.

Can WP tungsten electrodes be used with WP17 and WP26 TIG torches?

They can be used with compatible TIG torch assemblies when the electrode diameter, collet, back-cap configuration and welding current requirements are appropriate. The WP electrode designation is not a torch compatibility rating.

How many WP tungsten electrodes are in one pack?

The supplied product catalog shows a Pack value of 10. Buyers should confirm the actual packing unit and package configuration before ordering.

Does INWELT support wholesale and OEM inquiries for WP tungsten electrodes?

Yes. INWELT welcomes bulk purchasing and OEM packaging inquiries. Buyers can provide electrode size, required quantity, destination country and packaging specifications for quotation evaluation.

Request a Quote for WP Green Pure Tungsten Electrodes

Looking for WP green pure tungsten electrodes for TIG welding consumable distribution or industrial procurement?

Contact INWELT to discuss your electrode specifications and purchasing requirements.

Please include the following details in your inquiry:

1. Electrode Classification: WP / EWP

2. Identification Color: Green

3. Electrode Diameter: Required size in millimeters

4. Electrode Length: 150 mm or 175 mm

5. Catalog Reference Code: If known

6. Order Quantity: Required number of electrodes or packs

7. Packaging: Standard or private-label requirements

8. Destination Country: For quotation and logistics evaluation

9. Technical Documents: Any applicable inspection or certification requirements

Contact INWELT for WP pure tungsten electrode specifications, bulk sourcing inquiries and OEM packaging evaluation.