Aluminum and Stainless Steel Q&A

Last updated almost 6 years ago

4 questions

1

2xx and 3xx Stainless steel contains _% - __% nickel by weight.

11 %-30%

7%-35%

5%-50%

Stainless doesn't have any chromium in it at all.

True

False

Because the aluminum oxide on the surface melts at a much higher temperature.

Because the aluminum oxide produces oxide inclusions in the weld.

It does not need to be brushed because of the cleaning action in the AC cycle.

It looks pretty.

2xx and 3xx Stainless steel contains ___% - ____% nickel by weight.

11 %-30%

7%-35%

5%-50%

Stainless doesn't have any chromium in it at all.

Cathodic bombardment is the cleaning action that occurs in straight polarity: DCEN.

True

False

Why must the surface of aluminum be brushed before welding?

Because the aluminum oxide on the surface melts at a much higher temperature.

Because the aluminum oxide produces oxide inclusions in the weld.

It does not need to be brushed because of the cleaning action in the AC cycle.

It looks pretty.