Solidification Cracking (hot Cracking)

Question 1

Where would you expect a crack to form in solidification cracking?

Answer 1

Center line crack

Question 2

What 3 conditions are needed for solidification cracking to occur?

Answer 2

Chemical composition - impurities

Unfavourable bead shape - width:Depth 1:2

Significant tensile stress - restraint, set up, contraction expansion

Question 3

At what temperature does weld metal start solidifying?

Answer 3

1400 degrees

Question 4

What cracking is also manifested by solidification cracking at the end of a weld?

Answer 4

Crater cracking