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Metals Flashcards

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1
Q

refers to the group of materials that are used in the construction of manmade structures and components

A

Engineering Materials

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2
Q

refers to the group of materials that are used in the construction of manmade structures and components

A

Engineering Materials

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3
Q

Classification of Engineering Materials

A

Metallic
Non-metallic
Newborn engineering materials

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4
Q

Classification of Engineering Materials

A

Metallic
Non-metallic
Newborn engineering materials

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5
Q

__________ are usually lustrous, ductile, malleable and good conductors of electricity.

A

Metallic

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6
Q

two classified Metallic Material

A

Ferrous and Non-ferrous

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7
Q

Example of Metallic

A

Silver
Copper
Gold
Aluminum
zinc
lead
tin

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8
Q

Example of Metallic

A

Silver
Copper
Gold
Aluminum
zinc
lead
tin

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9
Q

refers to those materials whose main constituent is iron.

A

Ferrous

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10
Q

melting points of iron

A

1540°c

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11
Q

melting points of iron

A

1540°c

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12
Q

is an alloy of iron and carbon, the percentage of carbon theoretically varies from 0-2%

A

Steel

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13
Q

Classification of Steel

A

Plain Carbon and alloy

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14
Q

________________ is that steel which the only alloying element present is carbon

A

Plain Carbon Steel

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15
Q

________________ is that steel which the only alloying element present is carbon

A

Plain Carbon Steel

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16
Q

low carbon or dead mild steel having carbon below ________

A

0.15

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16
Q

mild steel having carbon between __________

A

0.15-0.3%

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16
Q

medium carbon steel having carbon between _________

A

0.3-0.7%

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16
Q

High carbon steels having carbon content above _______

A

0.7% ( the higher practical limit of C% IS 1.3%)

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16
Q

It has got very good weldability and ductility.

A

Dead mild steel

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16
Q

It is used very extensively for structural work.

A

Mild steel

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17
Q

It has little weldability but is stronger and has better wearing property the mild steel.

A

Medium carbon steel

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17
Q

It is used for hand tools like cold working dies, hammer, boiler maker’s tool, wood working tools, hand taps and reamers, filters, razors, shear blades etc.

A

High carbon steels

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17
Q

It is the purest form of iron

A

Wrought Iron

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17
contain more the 2% carbon, which is the theoretical limit for steels.
Cast irons
17
Varieties of Cast Iron
Grey cast iron White cast iron Malleable cast iron Nodular cast iron Alloy cast iron
17
is very widely used in the forms of casting.
Grey cast iron
17
iron has 2 to 2.5% carbon and most of it is in the form of cementite.
White cast iron
17
starts out as white casting but is the threated at a heat of roughly 1,650 F, 900 C.
Malleable iron
17
is also called ductile iron, spheroidal graphite iron, and spheroidal graphite cast iron, is graphite-rich cast iron.
Nodular cast iron
17
have higher strength, heat-resistance and greater wear-resistance etc.
Alloy cast iron
18
what are the 3 groups of steels?
stainless steels tool steel special steels
19
These steels are called stainless because they do not corrode or rust easily.
Stainless Steel
20
Stainless steels are further divided into the following three categories
Ferritic Martensitic Austenitic
21
These steels contain a maximum of 0.15% carbon, 6-12% chromium, 0.5% nickel besides iron and usual amounts of manganese and silicon.
Ferritic Stainless Steel
22
These stainless have 12-18% chromium but contain higher carbon percentage (0.15-1.2%).
Martensitic Stainless Steel
23
These are the most important and costliest among all stainless steels.
Austenitic Stainless Steel
24
refers to different types of strong carbon and alloy steels that are especially suitable for making tools like reamers, drills, machine dies, and hand tools since they are very hard, resistant to wearing down and deformation, and can keep a sharp edge even when subjected to elevated temperatures.
Tool Steel
25
They are used for railway points and crossings, and with usage they become more wear-resistant.
Manganese Steels
26
makes the steel highly resistant to corrosion, non-magnetic, and having very low coefficient of thermal expansion.
Nickel Steels
27
makes steel corrosion resistant and increases its UTS.
Chromium
28
A steel containing 0.05% carbon, about 0.3% Mn and 3.4% of silicon possesses extremely low magnetic hysteresis and is used widely for making laminations of electrical machines.
Silicon Steels.
29
Kinds of heat treatment given to carbon steels
Annealing Normalizing Hardening Tempering
29
is a heat treatment process that is used to make more ductile and tough after it has been subjected to thermal or mechanical hardening processes.
Normalizing
29
The purpose of ________________ is to soften the material.
Annealing
30
involves heating and soaking.
Hardening
31
means giving up a certain amount of hardness but shedding a great deal of brittleness acquired in the process of hardening.
Tempering
32
Only those carbon steels can be hardened whose carbon content is about 0.25% or more.
Case Hardening
33
They are softer and there more malleable.
Non-Ferrous Metals and Alloy
34
is a corrosion resistant metal of an attractive reddish brown color.
Copper
35
is a difficult to extract from its main called bauxite.
Aluminum
36
It has an attractive silvery white color.
Tin
37
is a heavy metal with dull grey appearance.
Lead
38
possesses a bluish grey metallic appearance,
Zinc
39
is a alloy of copper and zinc
Brass
40
is an alloy of copper and tin although commercial bronzes may contain other elements besides tin.
Bronzes
41
Give the Varieties of tin bronzes that are commonly used
Phosphor-Bronze Leaded-Bronze Gun-metal Bell-metal
42
Addition of 0.5% phosphorous to tin bronze results in production of phosphorous bronze.
Phosphor-Bronze
43
is actually a source of weakness but adds to machinability and has self lubrication properties.
Leaded-Bronze
44
This bronze is used for bearing bushes glands, pumps, valves etc.
Gun-metal
45
Type of bronze contain no tin. It possesses good strength and good corrosion resistance. Color: golden yellow. Often used for jewelry. Composition: 14%
Aluminum Bronze
45
It is a tin bronze but having a very high percentage of tin (20-25%). It gives a good tinkling sound on being struck with a hammer.
Bell-metal
46
Type of bronze contain no tin. Possesses extremely good corrosion resistance. Can be cold worked and strain-hardened. Used for boiler fitting and marine fittings. Composition: 1-4%
Silicon Bronze
47
Type of bronze contain no tin. It is essentially a brass which manganese has been added. It is used for ship's propellers. Composition: 40%
Manganese Bronze
48
Type of bronze contain no tin that very costly. It contains about 2% Be. It has very good mechanical properties and can be cold worked and age-hardened. It is mainly used for bellows, bourdon gauge tubes etc.
Beryllium Bronze
49
They are extensively used for marine fittings. They also possess good strength, hardness and ductility.
Cupro-nickels
50
It is a cupro-nickel to which zinc has been added.
German silver
51
52
Its composition is 68% nickel, 30% copper, 1% iron, remainder manganese etc.
Monel metal
52
Alloys principally containing, chromium and iron. Used in electrical industry.
Inconel and incoloy
52
Alloy of nickel and chromium, which is used as heat resistant electrical wire in furnaces and heating devices like geysers, electric iron etc.
Nichrome

Manufacturing Technology (2 decks)

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