Common Defects in Stainless Steel Welding and Prevention Measures

Release time:

2026-06-29

Detailed analysis of five common welding defects with specific prevention measures.

Common defects in stainless steel welding and prevention methods:

1. Intergranular Corrosion: Caused by chromium carbide precipitation at grain boundaries when weld HAZ stays in 450-850°C range too long. Prevention: Control heat input, use low-carbon filler metals (e.g., 308L).

2. Hot Cracking: Caused by segregation of S, P impurities forming low-melting eutectics. Prevention: Control S, P content; optimize parameters to reduce welding stress.

3. Porosity: Caused by insufficient shielding gas or contaminated workpiece surface. Prevention: Ensure adequate gas flow; clean workpiece surfaces before welding.

4. Lack of Penetration/Fusion: Caused by improper groove design, insufficient current or excessive travel speed. Prevention: Design proper grooves; adjust parameters for adequate heat input.

5. Undercut: Caused by excessive current, fast travel speed or improper electrode angle. Prevention: Adjust parameters; maintain correct electrode angle and travel speed.

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