Welder Red Seal · Question
Sensitization, or "weld decay," in austenitic stainless steels (e.g., 304) is caused by the precipitation of what compound at the grain boundaries?
When austenitic stainless steel is held in a specific temperature range (approx. 450-850°C), carbon combines with chromium to form chromium carbides at the grai
Start free practice for Welder Red Seal
154 questions · no signup required · 40 free questions per day
Question: Sensitization, or "weld decay," in austenitic stainless steels (e.g., 304) is caused by the precipitation of what compound at the grain boundaries?
Answer options:
- Iron carbides ✅ Chromium carbides
- Niobium carbides
- Martensite
Correct answer: Chromium carbides
Explanation: When austenitic stainless steel is held in a specific temperature range (approx. 450-850°C), carbon combines with chromium to form chromium carbides at the grain boundaries. This depletes the surrounding area of chromium, reducing its corrosion resistance and leading to intergranular corrosion.
Start free practice for Welder Red Seal
154 questions · no signup required · 40 free questions per day
More about Welder Red Seal
Related Questions
- A welder is fabricating a pressure vessel component using FCAW-G with an E70T-1 wire. The procedure specifies
- A welder is preparing to weld 20 mm (0.8 in) thick high-strength low-alloy (HSLA) steel using FCAW-G. The weld
- A structural steel fabricator is using FCAW-S (E71T-8 wire) to weld heavy sections of structural steel in an o
- When performing FCAW-G (gas-shielded flux-cored arc welding), a welder notices the arc is unstable and the wir
- A structural welder is performing overhead FCAW-G on 12 mm (0.5 in) thick steel with an E71T-1 wire. The weld
- A welder is setting up an FCAW-S machine for welding in a remote location without access to external shielding
More for Welder Red Seal candidates
Practice tests
Question explanations
- A welder is fabricating a pressure vessel component using FCAW-G with an E70T-1 wire. The procedure specifies
- A welder is preparing to weld 20 mm (0.8 in) thick high-strength low-alloy (HSLA) steel using FCAW-G. The weld
- A structural steel fabricator is using FCAW-S (E71T-8 wire) to weld heavy sections of structural steel in an o
- When performing FCAW-G (gas-shielded flux-cored arc welding), a welder notices the arc is unstable and the wir
Ready to practice?
Free, no signup required. Build a wrong-question list as you go.
Start Free Welder Red Seal Practice →Related courses
Other Canadian certifications candidates often prepare for alongside this one.