Definition and Metal Designation (Module 1-1)

Question 1

T/F: Metals have high electrical and thermal conductivity.

Answer 1

True

Question 2

T/F: Metals have a chararacteristic surface luster or shine.

Answer 2

True

Question 3

T/F: Metals are malleable and ductile.

Answer 3

True

Question 4

T/F: About 60% of the elements are metals.

Answer 4

False. About 80% of the elements are metals.

Question 5

These are substances composed of two or more metals, or sometimes a metal and a non-metal, which have been intimately mixed by fusion, electrolytic deposition, or the like.

Answer 5

Alloys

Question 6

Alloys are substances that are composed of two or more chemical elements such that _____ bonds predominates and in terms of composition, metallic elements are the primary constituents.

Answer 6

metallic

Question 7

What are the two constituents of an alloy?

Answer 7

Base metal and alloying elements

Question 8

It is the element that is present in major proportions in an alloy.

Answer 8

Base metal

Question 9

These are the other elements present in minor proportions in an alloy.

Answer 9

Alloying elements

Question 10

What are the two classifications of alloys?

Answer 10

Cast alloys and wrought alloys

Question 11

These alloys cannot undergo appreciable deformation (brittle) without breaking or fracturing during forming or shaping.

Answer 11

Cast alloys

Question 12

These alloys are amenable to mechanical deformation (ductile).

Answer 12

Wrought alloys

Question 13

What is AISI-SAE Sytem?

Answer 13

American Iron and Steel Institute and the Society of Automotive Engineers

This is the system widely used in the US and in the Philippines that designates alloy codes.

Question 14

What do the first two digits of an AISI-SAE code represent?

Answer 14

The presence of other alloying elements aside from carbon.

Question 15

What do the last two/three digits of an AISI-SAE code represent?

Answer 15

The wt% carbon multiplied by 100.