GTAW Welding (TIG)

Precision Tungsten Inert Gas (TIG) Welding Services

Lynn Welding provides Nadcap accredited precision fusion welding services and specializes in GTAW (Gas Tungsten Arc Welding).

Precision TIG or GTAW (Gas Tungsten Arc Welding)?

Precision TIG welding can be used and applied to different industries such as aerospace, medical and automotive. GTAW process is suitable for welding all material due to electrode is not melting during the welding operation.

The electrode is made of tungsten alloy which can tolerate a very high temperature and would allow to weld at low current and weld as thin as 0.005-inch-thick material.

Filler material or welding wire/rod is used externally and will be consumed during the welding process. Precision GTAW can be performed using DCEP (Direct Current Electro Positive) which focuses on heating the electrode and DCEN (Direct Current Electro Negative) which focuses on heating more the base material.

AC is typically used when welding aluminum because it helps with the cleaning as well and to prevent potential porosities and cracks.

Inert gas is used during the precision welding process and it works as a shield to protect the weld from contamination. Usually Argon is the most common gas for the GTAW process and sometimes helium is used as well.

The GTAW process is very clean process and requires high skilled welders to perform the welding. That is the reason that GTAW is used for very critical application such as the aerospace industry. GTWA produces a high-quality weld to assure successful joint and great appearance.

Here is a photo below shows the element used in the GTAW process. 

Source: American Welding Society

One of the potential issues to watch for while using the precision GTAW process is contamination. The base material and the filler material have to be extremely clean to produce a high-quality weld. If the base material, filler material is not clean and there was some moisture surrounding the weld area, that would affect the quality of the weld and perhaps will lead to potential defects.

Our team is trained and experienced to produce a high-quality weld and successful results. We often consider GTAW as the more glamourous welding process.

Lynn Welding is qualified to weld per AWS D17.1, PWA 16, MIL-STD-2219, HS 191 and many other aerospace welding certifications.

Lynn Welding is AWS D17.1 Certified, view our other precision aerospace welding approvals below.

Lynn Welding's GTAW Welding (TIG) Approvals



Lynn Welding is a well known Raytheon Approved Welding company when it comes to welding and machining for the Aerospace, Defense, Nuclear, Industrial, and Medical industries.

Raytheon Approved Fusion Welding

Raytheon Approved Torch Brazing

Bell Helicopter

Bell Helicopter

Lynn Welding is Bell Helicopter approved for Resistance Welding and Fusion Welding processes, and preparation of metals.

Bell Helicopter Approved Fusion Welding

Collins Aerospace (Hamilton Sunstrand / UTAS)

Collins Aerospace (Hamilton Sunstrand / UTAS)

All Procedures are GTAW-MA (Gas Tungsten Arc Weld-Manual)

Collins Aerospace (Hamilton Sunstrand / UTAS) Approved Fusion Welding

Kaman Aerospace

Kaman Aerospace

Approved by Kaman Aerospace for Fusion Welding, Resistance Stitch Welding, Resistance Seam Welding.

Kaman Aerospace Approved Fusion Welding

Northrop Grumman

Northrop Grumman

Approved by Northrop Grumman for Fusion Welding & Resistance Welding. All Procedures are GTAW-MA (Gas Tungsten Arc Weld-Manual)

Northrop Grumman Approved Fusion Welding

United Launch Alliance

United Launch Alliance

United Launch Alliance welding certifications. All Procedures are GTAW-MA (Gas Tungsten Arc Weld-Manual)

United Launch Alliance Approved Fusion Welding

United Launch Alliance Approved Torch Brazing



Lynn Welding holds a Sikorski-Approved Welding Certification for Fusion Welding, Brazing & Resistance Welding

Sikorsky Approved Fusion Welding

General Dynamics

General Dynamics

Lynn Welding is approved by General Dynamics for Fusion Welding, Resistance Welding, Spot, Seam and Stitch

General Dynamics Approved Fusion Welding

Hawker Beechcraft

Hawker Beechcraft

We are an approved Hawker Beechcraft welder and fabricator for Fusion Welding and Resistance Welding, Spot and Seam

Hawker Beechcraft Approved Fusion Welding

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75 Rockwell Road
Newington, CT, 06111

Phone: 860.667.4400