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When Welding Steel Strip with a Medium-Frequency Spot-Welder, How to Avoid Burn-Through?
Oct 13,2026
When welding steel strip with a medium-frequency spot-welder, improper heat-input control easily causes burn-through, where the metal at the weld spot overheats, melts through, and forms holes.
I Hazards of Steel-Strip Spot-Welding Burn-Through
1.Hole defects appear, damaging the load-bearing capacity of the weld spot
2.Rough surfaces and welding spatter appear at the weld-spot position
3.Batch defects easily occur, increasing rework and product-scrapping costs
II Main Causes of Steel-Strip Spot-Welding Burn-Through
1.Unreasonable welding heat input
2.Abnormal pressure and contact condition
3.Poor electrode operating condition
4.Workpiece incoming-material and tooling factors
III Measures to Avoid Steel-Strip Burn-Through
1.Optimize welding process parameters
2.Rationally control electrode pressure
3.Do good electrode maintenance management
4.Control workpiece surface and incoming material
5.Tooling clamping and process control
Wuxi Haifei Intelligent Equipment Co., Ltd. https://www.haifeiwelder.com/
Wuxi Haifei Intelligent Equipment Co., Ltd. has been focusing on the R&D and production of spot‑welding machines for 17 years. The company has obtained ISO9001 Quality Management System Certification, China Compulsory Certification (3C) and CE Certification. It is a National High‑tech Enterprise, a Specialized, Refined, Differential and Innovative Enterprise of Jiangsu Province, a Specialized, Refined, Differential and Innovative Enterprise of Wuxi, and a Gazelle Enterprise in the Southern Jiangsu National Self‑Dependent Innovation Demonstration Zone.
Should you be interested in our spot‑welding machines, please contact us: 400‑0510‑750.
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Wuxi HAIFEI Intelligent Equipment Co., Ltd.
Wuxi HAIFEI Welding Equipment Co., Ltd.
Add: 28 Shuiyun Road, Yuecheng, Jiangyin, Jiangsu Province, China. (Postal Code: 214404)
Mobile: +86 18915302352
Email: wushijie@jshaifei.com