Hydrogen Cracking

Question 1

What are the four specific conditions for HICC?

Answer 1

Hydrogen <15ml per 100mg of weld metal deposited

Hardness < 400 HV (martensite)

Stress < 0.5 of material yield stress

Temperature > 300 degrees

Question 2

What effect does a higher CEV have on a material?

Answer 2

Higher hardness

Question 3

If the material is thick heat is drawn away quickly creating a high?

Answer 3

Heat sink