CWB Welding Inspector Level 3 Practice Questions - CWB Level 3 Welding Inspector Certification Examination Exam

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A structural steel has the following chemical composition: 0.16% C, 1.35% Mn, 0.25% Si, 0.05% Cr, 0.08% Ni, 0.12% Cu, and 0.02% V. Using the IIW carbon equivalent formula, what is the calculated CE value and what does this value indicate regarding the weldability of the steel?

CE = 0.385%; indicates excellent weldability and no preheat is required under normal conditions. CE = 0.415%; indicates moderate weldability and preheat may be required depending on thickness and joint restraint. CE = 0.495%; indicates poor weldability requiring mandatory high preheats and post-weld heat treatment. CE = 0.355%; indicates that the steel is highly susceptible to solidification cracking.

Correct Answer:

CE = 0.415%; indicates moderate weldability and preheat may be required depending on thickness and joint restraint.

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