Which material is least affected by Brittle Fracture?

Which material is least affected by Brittle Fracture?

• A. 316 series Stainless Steel
• B. 405 series Stainless Steel
• C. 410 series Stainless Steel
• D. 300 series Stainless Steel

Answer: (D)

Brittle fracture happens when a metal under stress fails with little plastic deformation, often becoming a concern at low temperatures. Austenitic stainless steels, which make up the 300-series, stay ductile and maintain high toughness across a wide temperature range. That toughness means they can absorb more energy before fracturing and are far less prone to brittle fracture than other stainless types that can harden or lose ductility, such as martensitic or ferritic grades. In practice, this superior toughness at low temperatures is why the 300-series stainless steels are the least affected by brittle fracture among the given options.

Brittle fracture happens when a metal under stress fails with little plastic deformation, often becoming a concern at low temperatures. Austenitic stainless steels, which make up the 300-series, stay ductile and maintain high toughness across a wide temperature range. That toughness means they can absorb more energy before fracturing and are far less prone to brittle fracture than other stainless types that can harden or lose ductility, such as martensitic or ferritic grades. In practice, this superior toughness at low temperatures is why the 300-series stainless steels are the least affected by brittle fracture among the given options.