What is Welding?

Welding is a fabrication process that involves joining two or more pieces of metal or thermoplastic materials together using heat, pressure, or both. The process creates a strong, permanent bond between the materials, allowing them to function as a single, cohesive unit.

How welding works?

Welding works by melting the materials at the joint interface and then allowing them to cool and solidify, forming a strong molecular bond. The heat required for welding can be generated through various methods, including electrical arcs, gas flames, lasers, and friction.

At AlfaTeh GmbH, we have adopted these types of Welding techniques:

MIG Welding

MIG (Metal Inert Gas) welding, also known as Gas Metal Arc Welding (GMAW), is a welding process that utilizes a continuous consumable electrode wire which is fed through a welding gun. The wire electrode is heated and melted by an electric arc, which is established between the wire and the workpiece. During the welding process, an inert gas, such as argon or a mixture of argon and carbon dioxide, is used to shield the weld area from atmospheric contamination.

MAG Welding

MAG (Metal Active Gas) welding is very similar to MIG welding, with the main difference being the type of shielding gas used. In MAG welding, an active gas, such as carbon dioxide or a mixture of carbon dioxide and argon, is used as the shielding gas instead of inert gas. This active gas reacts with the molten weld pool to stabilize the arc and improve weld penetration.

TIG Welding

TIG (Tungsten Inert Gas) welding, also known as Gas Tungsten Arc Welding (GTAW), is a welding process that uses a non-consumable tungsten electrode to produce the weld. The weld area is protected from atmospheric contamination by an inert gas, typically argon or helium.

These welding processes each have their unique advantages and applications, making them suitable for various welding tasks across different industries and materials.

Welding Robots

At AlfaTeh GmbH, we utilize both MIG (Metal Inert Gas) and MAG (Metal Active Gas) welding robots to enhance our welding capabilities and efficiency.

By integrating MIG and MAG welding robots into our operations, we ensure superior weld quality, increased productivity, and greater flexibility in catering to diverse welding requirements across various industries and material types


The company, AlfaTeh GmbH, holds certification according to standards EN 1090-1 and EN 1090-2, specifically class EXC2, for the execution of steel structures up to S460 material quality.
EN 1090-1
  • This standard specifies the requirements for the execution of structural steel and aluminum components and structures. It covers aspects such as design, fabrication, and installation.
  • Compliance with EN 1090-1 ensures that the company’s manufacturing processes meet the necessary quality standards and regulatory requirements for structural steelwork.
EN 1090-2
  • EN 1090-2 complements EN 1090-1 by providing specific technical requirements for the fabrication and assembly of steel structures.
  • It addresses various aspects including welding, surface treatment, and non-destructive testing, ensuring the quality and safety of the fabricated steel structures.
Class EXC2
  • The class EXC2 refers to the Execution Class, which categorizes the level of quality control and production control required for the fabrication of steel structures.
  • EXC2 is a mid-level classification indicating that the company is capable of executing steel structures with moderate complexity and safety-critical requirements.
Steel Structures up to S460 Material Quality
  • S460 is a designation for structural steel indicating its minimum yield strength, measured in megapascals (MPa).
  • Being certified for steel structures up to S460 material quality signifies that the company is authorized to fabricate steel components and structures using steel with a minimum yield strength up to S460 MPa.
Click here for more information about our Certificates

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