What is meaning of Lack of Penetration in Welding? |

What is meaning of Lack of Penetration in Welding?

  1. Lack of penetration –

“Improper penetration of weld metal through the thickness of joint or weld metal not extending to the required depth into the joint root”

  • Acts as stress riser from which a crack may propagate

MGA15

Cause –

  • Root gap too small
  • high welding speed
  • Low heat input
  • Too large electrode dia

Prevention:  

  • Proper joint preparation
  • Proper heat input & welding speed
  • Use suitable size of electrode

manish-mayank

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