STAINLESS STEEL AND ALUMINUM

Question 1

What film forms on stainless steel, giving it great resistance to corrosion?

Answer 1

Chromium oxide

Question 2

How many groups are stainless steels typically broken into?

Answer 2

4

Question 3

Which mill finish would be the most reflective on a stainless steel sheet?

Answer 3

8

Question 4

By how many gauges do we de-rate tool capacities when working with stainless steel?

Answer 4

4 (2 working gauges)

Question 5

Stainless steels are alloys

T or F

Answer 5

True

Question 6

Austenitic stainless steels belong to the 300 series

T or F

Answer 6

True

Question 7

When hack sawing stainless steels you should:

Answer 7

Always have 2 teeth in contact with the material

Question 8

What is recommended when drilling a hole in stainless steel?

Answer 8

Decrease speed increase pressure

Question 9

What is the best included angle for a twist drill bit used for drilling stainless steels?

Answer 9

135

Question 10

What can be done to compensate for spring-back when forming stainless steel in a brake?

Answer 10

Over bending

Question 11

What is the correct order of procedure when finishing stainless steels?

Answer 11

GSPB (Grind, Sand, Polish, Buff)

Question 12

What is the main advantage to using stainless steel as a fabrication material opposed to using carbon steel?

Answer 12

Higher corrosion resistance

Question 13

In type 304 18-8 stainless steel, what is the nickel content in percentage?

Answer 13

8

Question 14

What is typically produced with type 420 stainless steels?

Answer 14

Surgical equipment

Question 15

What can be a result of not removing a burr from a piece of stainless steel?

Answer 15

Poor fit up

Question 16

What is a disadvantage to using bottoming dies when power braking stainless steel?

Answer 16

Causes damage to the material

Question 17

Why is it not recommended to soft solder stainless steels together?

Answer 17

The joint may be weak

Question 18

What can be done to test a stainless steels spot-weld quality?

Answer 18

60-90 twist test

Question 19

Why is it preferable to tig weld stainless steels?

Answer 19

Weld quality and ease to finish

Question 20

Which procedure is quickest to weld stainless steels?

Answer 20

GMAW

Question 21

Skip welding can also be called_______

Answer 21

Stitch welding

Question 22

How should full-sized stainless steel sheets be stored prior to fabrication?

Answer 22

Upright position

Question 23

What is the result of forgetting to remove vinyl coatings before welding stainless

Answer 23

A weld that is not as corrosion resistant as the base material

Question 24

When bending stainless steels in a power brake using bottoming dies or 90° V dies, what is this process typically called?

Answer 24

Coining

Question 25

Which of the following is NOT a result of air bending when forming stainless steels Consistent bends Acute angles can be bent Less pressure is required to complete the bend Fewer scars and scratches form on the material

Answer 25

Consistent bends

Question 26

What is the easiest way to identify a piece of austenitic stainless steel?

Answer 26

Magnet

Question 28

If fabricating a counter top for a kitchen or lab, what type of joint is recommended to join 2 flat pieces of stainless steel together?

Answer 28

Butt weld

Question 29

What polarity is most commonly used when TIG welding stainless steel 16ga pieces together?

Answer 29

DCEN (straight polarity)

Question 30

What should be done before you bend any pieces of stainless steel after shearing?

Answer 30

Remove burr

Question 31

When welding a stainless steel pan with TIG, how much penetration should we strive for?

Answer 31

85%

Question 32

When using a portable angle grinder to start finishing stainless steel welds, what is the recommended angle from the metal surface that the disc should be held for flat or surface grinding?

Answer 32

10 degrees

Question 33

In what application for finishing stainless steel would a die grinder be a good tool to use?

Answer 33

Edges that are hard to reach

Question 34

When using a band saw to cut 10ga aluminum, what is the first most critical setting for precise optimum cutting?

Answer 34

Blade tension

Question 35

When using a standard hand brake on lighter gauge utility aluminum, what is the recommended (ILM) distance you should move the nose bar back from bending leaf pivot point?

Answer 35

3 material thicknesses

Question 36

When air bending aluminum in a power brake, what is the recommended bottom die opening for material up to and including 1/2" thick?

Answer 36

8 material thicknesses

Question 37

What is extremely important in order to produce a good TIG weld on aluminum material?

Answer 37

Good fit up of the pieces being welded

Question 38

When TIG welding aluminum what is the first key step for proper welding technique?

Answer 38

Puddle control

Question 39

When TIG welding, the electrode is consumed in the weld. T or F

Answer 39

False

Question 40

When TIG welding aluminum where do we add the filler material?

Answer 40

To the weld pool

Question 41

What are the four groups of stainless steels

Answer 41

Austenitic Ferritic Martensitic Duplex

Question 42

What are the two most common 300 series stainless steels used

Answer 42

304 and 316

Question 43

What are three common ways to compensate for spring back

Answer 43

Over braking, coining, over rolling

Question 44

What type of fluxes can be used prior to soldering stainless

Answer 44

Phosphoric Muriatic avid Or hydrochloric acid

Question 45

What grit range should the grinding process include

Answer 45

50-100

Question 46

What grit range should the sanding process include

Answer 46

100-150