Welder Red Seal · Question
Which of the following elements is primarily responsible for improving the hardenability and strength of low-alloy steels, often without significantly compromising ductility when properly heat treated?
Manganese is a common alloying element in low-alloy steels that significantly increases hardenability and strength. Sulphur and phosphorus are typically conside
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Question: Which of the following elements is primarily responsible for improving the hardenability and strength of low-alloy steels, often without significantly compromising ductility when properly heat treated?
Answer options:
- Sulphur
- Phosphorus ✅ Manganese
- Silicon
Correct answer: Manganese
Explanation: Manganese is a common alloying element in low-alloy steels that significantly increases hardenability and strength. Sulphur and phosphorus are typically considered impurities that can cause brittleness, while silicon is primarily used as a deoxidizer and can contribute to strength but is not the primary element for hardenability in the way manganese is.
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- 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
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