Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

Medium Pressure Duct Fabrication > Stainless Steel > Flashcards

Stainless Steel Flashcards

1
Q

How much you de-rate stainless steel to prevent damage or strain to the equipment?

A

De-rate by 4 gauge thicknesses.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

What other terms are used for de-rating Stainless Steel by 4 gauge thicknesses?

A

2 working gauges is commonly used in the field and 2 working gauges can be defined as even gauges.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

What’s the four groups of Stainless Steel?

A
  1. Austenitic steel
  2. Ferritic steel
  3. Martensitic steel
  4. Duplex steel
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

Which stainless steels are

non-magnetic and 300 series stainless steels?

A

Austenitic steels

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

What percentage of chromium oxide has to be in stainless steel for a invisible film to form and protect the material?

A

When chromium oxide content percentage exceed 11% in stainless steel, the invisible film is formed to protect the material.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

When using mild steel machines to fabricate stainless steel, how much do you de-rate the stainless steel?

A

4 gauge thicknesses or 2 working gauges or even gauges.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

What colour is stainless steel snipes?

A

Blue, they have blue handles

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

How many teeth of a hack saw blade should be in contact with the stainless steel material when cutting?

A

Two teeth on material at all times

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

What’s the best drill bit selection for drilling stainless steel?

When drilling stainless steel, the drill speed should be decreased to approximately?

For stainless steel what should be the drill included angle?

What should the lip clearance be for drilling stainless steel?

A

Titanium coated high speed steel drill bits.

Drill speed of rotation should be decreased by 50%, when drilling stainless steel.

130 degrees to 140 degrees.

8 degrees to 10 degrees.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

What’s the minimum hole diameter that can be punched into stainless steel?

A

At least twice the material thickness

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

What do you increase and decrease or reduce on squaring shears when shearing stainless steel?

A

Increase the Rake Angle.
Increase the Shear Angle.
Decrease or reduce the Gap of the blades.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

What’s the minimum hole diameter that can be punched into stainless steel?

A

The hole should be at least twice the material thickness

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

All sheet metal equipment is rated for mild steel and must be de-rated by 2 working gauges for stainless steel. What’s other terms used to de-rate stainless?

A

4 gauge thicknesses or even gauges

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

Truss bars are set on hand brakes to prevent longer stainless steel projects from?

A

Under breaking in the centre of the project.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

What do you set on a hand brake to prevent under breaking in the centre of a project?

A

You set the Truss Bar.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

What advantages does air bending power brake have than bottom bending power brake?

A

Less pressure is required to complete the bend.

Fewer scars and scratches on the material.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

When power braking stainless steel, how do you protect the material form iron contamination?

A

A protective cover should be placed on all bottoms dies. Like polyethylene.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

All sheet metal equipment is rated for mild steel and must be de-rated by 2 working gauges for stainless steel. What’s other terms used to de-rate stainless?

A

4 gauge thicknesses or even gauges

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

Truss bars are set on hand brakes to prevent longer stainless steel projects from?

A

Under breaking in the centre of the project.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
20
Q

What do you set on a hand brake to prevent under breaking in the centre of a project?

A

You set the Truss Bar.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
21
Q

What advantages does air bending power brake have than bottom bending power brake?

A

Less pressure is required to complete the bend.

Fewer scars and scratches on the material.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
22
Q

When power braking stainless steel, how do you protect the material form iron contamination?

A

A protective cover should be placed on all bottoms dies. Like polyethylene.

23
Q

When spot welding stainless steel, what are the following adjustments that should be made when setting up a spot welder from mild steel?

A

Increase the pressure.

Lower the amperage and current flow times.

24
Q

Gas Tungsten Arc Welding on stainless steel is a direct current with a straight polarity ( electrode negative).

Define DCSP?

A

Direct Current Straight Polarity
(Electrode is Negative)

DCSP is used for welding stainless steel with a Gas Tungsten Arc Welder.

25
Q

What’s the percentage of Stainless steel expansion rate and heat conductivity compared to mild steel?

A

Stainless steel has about 50% larger expansion rate and heat conductivity about on third as great when compared to that of mild steel.

26
Q

What’s the percentage of Stainless steel expansion rate and heat conductivity compared to mild steel?

A

Stainless steel has about 50% larger expansion rate and heat conductivity about on third as great when compared to that of mild steel.

27
Q

Gas Tungsten Arc Welding on stainless steel is a direct current with a straight polarity ( electrode negative).

Define DCSP?

A

Direct Current Straight Polarity
(Electrode is Negative)

DCSP is used for welding stainless steel with a Gas Tungsten Arc Welder.

28
Q

What stainless steel series may require pre and post heating treatments to prevent brittle welds and welds cracking?

A

The 400 series, stainless steels

29
Q

What aids in adsorption of some heat when welding stainless steel?

A

Copper chill plates

30
Q

Before removing the copper chill plates, allow the stainless steel weld to?

A

Cool down before removing form the weld

31
Q

An Aluminum backing works in the same fashion as the copper chill plates.
What’s the advantages of the Aluminum backing?

A

Aluminum is a good conductor.

In-expensive and can be formed for projects

32
Q

What techniques used to control distortion on the material when welding stainless steel?

A

Skip welding

Stitch welding

Step-back welding

33
Q

A 11% of this is formed on stainless steel to protect the material.

A

Chromium oxide

34
Q

Austenitic steels are which series?

A

300 series

35
Q

What’s the included angle when drilling stainless steel?

A

135 degress

36
Q

What method of bending should be used when power braking?

A

Air Bending

37
Q

Silver brazing is a form of what solder?

A

Hard soldering

38
Q

What settings must be done prior to spot welding stainless steel?

A

Increase pressure and decrease current.

39
Q

The best method of welding stainless steel to use for quality is?

A

GTAW

Gas Tungsten Arc Welding.

40
Q

What are the four steps to finishing stainless steel projects?

A

Grind,Sand,Polish, and Buff

41
Q

What types of flux is used for soldering stainless steel?

A

A phosphoric base flux, such as Lloyds flux.

42
Q

What another type of soldering process for stainless steel ?

A

Hard soldering.

Silver soldering also known as Silver Brazing.

43
Q

When resistance welding stainless, what adjustments should be done to the spot welder?

A

Lower the amperage, Increase the pressure, Timing accuracy

44
Q

When resistance welding stainless steel and testing the spot weld. What angle should the metal be bended, before the spot weld breaks?

A

A 60 to 90 degree angle should be achieved before the spot weld breaks.

45
Q

When resistance welding stainless steel, what other welding tips can used on the spot welder to reduce the damage to the stainless steel?

A

Swivel tips, rather than the tapered shank tips.

46
Q

What is stainless steel expansion rate when heated compared to mild steel.

A

Stainless steel expands about 50% larger than mild steel when heated.

47
Q

For stainless steel, the number 302-18-8 means?

A

Austenitic stainless steel (300 series)

18% chromium and 8% Nickel

48
Q

How is spring-back compensated for bending stainless steel?

A

Over bending the metal.

49
Q

Silver brazing stainless steel is a form of what type of soldering?

A

Hard soldering.

50
Q

What are the four steps in finishing a stainless steel project in the correct order?

A

Grind, Sand, Polish, and Buff

51
Q

What series is Austenitic stainless steel?

A

300 Series

52
Q

What are some of the methods of distortion control when welding stainless steel?

A

Copper chill plates
Skip welding
Step back welding

53
Q

Define the word Coining for stainless steel.

A

The process of applying extra pressure to material to attain a true 90 degree angle when using a V-die on a power brake.

Medium Pressure Duct Fabrication (1 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions