How to Avoid the Most Common MIG/MAG Welding Defects

Welding ABC

How to Avoid the Most Common MIG/MAG Welding Defects

February 15, 2021

The quality requirements in welding production increase with the optimization of structures as well as the development of materials and welding processes. Welding defects can, at worst, cause serious accidents and structural damage, so it is important to avoid them and understand the mechanisms that create them. In this text, we present the most common MIG/MAG welding defects and the ways to best avoid them.

Reetta Verho

Reetta Verho
Author

Reetta Verho

Manager, Welding Services at Kemppi Oy. International Welding Engineer (IWE) who is an active member in ISO standardization committees. Board member in The Welding Society of Finland. Passionate about welding quality and the development of welding production. Member of: K105 National mirror committee for welding, ISO/TC44/SC10 Quality management in the field of welding ISO/TC44/SC11 Qualification requirements for welding and allied processes personnel.

More blog posts

Calculation of heat input in MIG/MAG welding

Calculation of heat input in MIG/MAG welding

The new welding procedure test standard, EN-ISO 15614-1:2017, provides recommendations for the measurement and calculation of heat input. In concrete terms, what does this mean for MIG/MAG welding? And how can workshops carry out these calculations in practice?

Welding ABC

Welding value with X5 FastMig

Welding value with X5 FastMig

Small improvements in welding efficiency can positively influence overall productivity and establish valuable cost savings. By investing in robust, reliable, and versatile equipment, you can improve and better manage welding project costs.

Manual welding

WeldEye enables remote work in welding production

WeldEye enables remote work in welding production

Managing welding production with a cloud-based software solution has considerable advantages. For one, it gives work supervisors or quality assurance teams the convenience of working remotely from home. It increases transparency, quality and efficiency, thanks to improved information flow and traceability. The welders also receive immediate feedback on their work.

Digitalization

Safety that keeps up with welders' challenges and changing risks

Safety that keeps up with welders' challenges and changing risks

Welding safety has become increasingly demanding. The hazards at the arc remain constant, but modern working conditions mean exposure can accumulate over longer shifts and in tighter indoor spaces. As a result, welding PPE needs to be treated as both protection for the welder and proof of compliance. At Kemppi, welding safety PPE is designed and validated in practice through clear requirements, welder-led feedback, and verified compliance with EU PPE Regulation 2016/425, CE marking processes, and relevant EN standards.

Safety, Welding ABC

Eurosatory 2026 And the Future of Defence Manufacturing

Eurosatory 2026 And the Future of Defence Manufacturing

Eurosatory 2026 highlighted a clear shift in modern defence manufacturing. While defence systems are becoming more digital, networked, and autonomous, their foundation remains physical. From armoured vehicles and artillery to industrial resilience, welding quality, steel structures, and production discipline remain paramount to defence readiness.

Digitalization, Innovation

How AI Supports Quality, Traceability, and Flexibility in Robotic Welding

How AI Supports Quality, Traceability, and Flexibility in Robotic Welding

The AITOOLS1 webinar explored how AI-assisted process control, machine vision, synchronized data, and machine learning models are advancing robotic welding automation, improving quality management, traceability, and production flexibility for demanding industrial production.

Welding automation, Innovation, Digitalization

Subscribe to our newsletter and be among the first to know the latest from Kemppi.

Select contact type

By subscribing, you agree to receive marketing emails from Kemppi.

The forerunners of arc welding

Kemppi is the design leader of the arc welding industry. Kemppi is the design leader in the arc welding industry. We are committed to boosting the quality and productivity of welding by continuous development of the welding arc and by working for a greener and more equal world. Kemppi supplies sustainable products, digital solutions, and services for professionals from industrial welding companies to single contractors. The usability and reliability of our products is our guiding principle. We operate with a highly skilled partner network covering over 70 countries to make its expertise locally available. Headquartered in Lahti, Finland, Kemppi employs over 650 professionals in 16 countries and has a revenue of 209 MEUR in 2023.

Kemppi – Designed for welders

Copyright © 2025 Kemppi Oy