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Stainless steels with high strength, but low corrosion resistance are known as _______

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Stainless steels with high strength, but low corrosion resistance are known as _______

(a) Austenitic stainless steel

(b) Ferritic stainless steel

(c) Martensitic stainless steel

(d) Duplex stainless steel

This question was posed to me during an online exam.

This intriguing question comes from Stainless Steels & Other Steels in portion Diffusion in Solids & Ferrous Materials of Engineering Material & Metallurgy

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The correct choice is (c) Martensitic stainless steel

To explain: Martensitic stainless steels are made of 12-14% chromium, along with molybdenum, nickel, and carbon. This makes the steels hard and brittle, but poorly resistant to corrosion. Martensitic stainless steels are used in making Swiss army knives.

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