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Which of the following is not an important property in terms of filler metals?

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in Casting-Forming-Welding I by (687k points)
Which of the following is not an important property in terms of filler metals?

(a) Thermal resistance

(b) Chemical resistance

(c) Corrosion resistance

(d) Appearance

This question was posed to me in unit test.

This question is from Salvaging Techniques topic in chapter Salvage of Defective Castings of Casting-Forming-Welding I

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Right choice is (a) Thermal resistance

The explanation is: When filler metals are considered, one has to be very careful while operating on it, as they play an important role in the weld characteristics. The thermal resistance has to be taken into account, but not as much as chemical resistance or corrosion resistance or the appearance of it.

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