Stainless steels with sigma can normally withstand normal operating stresses but upon cooling to temperatures below _______ may show a complete lack of fracture toughness as measured by a Charpy impact test.

Question

Quizplus · Accepted Answer

Sigma phase embrittlement in stainless steels typically becomes a concern at temperatures below 500º F, where the material may lose fracture toughness.

Stainless Steels with Sigma Can Normally Withstand Normal Operating Stresses