API-577 Exam Results

Interpass temperature control is not needed.

There is less susceptibility to cracking from contaminants.

There is less susceptibility to lack of fusion.

The weld pool tends to be sluggish.

Chemical composition.

Tensile strength to be higher than the base metal.

Acceptability of physical properties.

Need for postweld heat treatment (PWHT).

Assure that the welded material has sufficient yield strength to avoid brittle fracture.

Assure that the welded material has sufficient ductility to assist brittle fracture.

Assure that the welded material has sufficient toughness to resist brittle fracture.

Assure that the welded material has sufficient tensile strength to avoid failure at design loads.

An area next to the heat-affected zone that has suffered some softening and loss of strength.

The microstructure of the weld that has been melted and will therefore have properties more like a casting than the base metal.

An area near the heat-affected zone affected by welding that may experience intergranular corrosion.

The high residual stress zone adjacent to the weld fusion line that will have higher hardness than the weld or base material.