🔬 STAINLESS STEEL & METALLURGY

Advanced MCQ Module | Interview & Exam Preparation

Question 1 of 10

⚠️ TEST INSTRUCTIONS

🔥 STAINLESS STEEL CLASSIFICATION & PROPERTIES

🧮 YOUR RESULTS

Your Metallurgy Knowledge Score

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🎯 KEY LEARNING

Metallurgy mastery requires understanding properties beyond composition —

Processing, heat treatment, and working conditions define material behavior.

📚 QUICK REVISION GUIDE

🔑 ESSENTIAL METALLURGY CONCEPTS:

1️⃣ Stainless Steel Types

Austenitic: Cr+Ni, non-magnetic, highest corrosion resistance

Ferritic: Cr only, magnetic, lower cost

Martensitic: Cr+low Ni, hardened, magnetic

2️⃣ Cold Work Effects

Increases hardness and strength but reduces ductility. Strain-induced martensite can form in austenitic steels.

3️⃣ Sensitization

Chromium depletion at grain boundaries during heating causes intergranular corrosion. Prevented by stabilization or solution annealing.

4️⃣ Heat Treatment

Annealing, solution treatment, and aging modify microstructure and properties significantly.

5️⃣ Pitting & Crevice Corrosion

Localized corrosion mechanisms in stainless steels. More resistance in higher Cr and Mo content.

6️⃣ Duplex Steels

Combination of austenite + ferrite. High strength + corrosion resistance at lower Ni content.

🎯 KEY TAKEAWAYS FOR PROFESSIONALS

  1. Composition is necessary but NOT sufficient — processing matters equally
  2. Common MCQ trap: Confusing properties with composition alone
  3. Understand the role of chromium, nickel, molybdenum, and nitrogen
  4. Heat treatment and cold working significantly alter material behavior
  5. Microstructure analysis is key to predicting performance