Steel Flashcards

(30 cards)

1
Q

Beyond 2 % carbon in ferrous materials

A

Iron above steel below

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2
Q

2-4% carbon

A

Cast iron

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3
Q

4-4.5%

A

Pig iron

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4
Q

Purest form of iron

A

Wrought Iron. Contains less than 0.05% C. Anything more. Not a steel

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5
Q

Two major families of steel

A

Carbon and alloy

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6
Q

Steel numbering

A

First two digits alloy group. The last 2 carbon content

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7
Q

0.05-0.35% C

A

Low carbon steel. Lower strength and hardness

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8
Q

0.35-0.50 % C

A

Medium Carbon steel. Balance of strength and duct. Good wear resistance. Stuctyre Al steel in category

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9
Q

Examples of med-Carbon steel

A

Forging and high strength castings. Automotive part.

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10
Q

Why higher Carbon steel can’t be welded?

A

The heat causes residual stress which will cause cracking. Oxygen-induced cracking. needs pre and post heating/cooling

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11
Q

What is v crack of residual stress on steel called

A

HAZ( Heat Affected Zone)

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12
Q

Stainless steel has a noticeable blank content.

A

Chromium content. minimum of 10 %

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13
Q

Steels with additional elements added to increase properties

A

Alloy Steel

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14
Q

What makes a steel corrosion resistant

A

high carbon and chromium content

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15
Q

Stainless steel types

A
  1. Austenitic 2. Super- Austentictic 3. Ferritic. 4. Duplex Steel. 5. Martensititc 6. Precitpation hardening Martensitic
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16
Q

When you heat An Austentic iron above 1300” degrees

A

it changes between BCC to FCC stucure.

17
Q

Austnetic

A

High corrosion resitant. high chromium content

18
Q

Ferritic

A

Steel with high iron. lower corrosion res than other Stainless steel.

19
Q

Causes cracking in the welding process for mild carbon steels

A

Residual Stresses

20
Q

0.5 - 1.00 % C.

A

High cabron contnet. prosisblity of crackign and brittleness. Very hard and Very Strong after heat treatment

21
Q

Fewer alloys than other alloy steels. easily weldable. more corrosion resistant

A

Low Alloy Steel

22
Q

Steels that are well suited for making different tools and tool parts. High Strenght. Wear Strength.

23
Q

two types of magnet

A

Temporary and permanent

24
Q

Spring steel

A

a stainless steel types

25
two types of forging
Forging uses a deformation usually a hammer. Hot forging ( is heated at Recrytalization temp) while cold forging is at room temperature. Cold hardenes them and Heat forges.
26
95 % of all metals produced in the world are these metals.
Iron and Steel
27
Low iron ore like substance. Contains a percentage of magnetite Firing at high temperatures it oxides the magnetite into Hameitite.
Talconite. Talconite pellets
28
Iron produced from a process getting rid the oxygen and oxides on the iron.
Direct Reduced Iron.
29
A process that is used to remove the gangue or other impure minerals in metals Steps Crushing then various processes of procceisn goremoving impurities.
Benefiticaiton
30
Uses elecctrodes with Carbon and Man. to remove iron.
DirectElectirc arc iron