Part-66 Module 6 Practice Questions - EASA Part-66 Module 06 - Materials And Hardware Exam

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In the SAE/AISI four-digit steel designation system used for aircraft alloy steels, what does the FIRST digit of the number '4130' indicate?

The carbon content as a percentage of weight The heat-treatment temper applied to the steel The minimum tensile strength in ksi on the label The major alloying element class (chrome-moly group)

Correct Answer:

The major alloying element class (chrome-moly group)

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