Metallurgy Flashcards
Define ductility:
The ability to deform or stretch without fracture under tension
Define malleability:
The ability to deform under compressive forces
What is the rate at which heat is conducted through a material?
Thermal conductivity
High alloy steels have alloying elements of _________ or higher?
10%
Which type of stainless steel contains the lowest level of chromium?
Martensitic stainless steel
Which lattice structure shape does iron have at room temperature?
BCC
Which lattice structure shape does aluminum have?
FCC
When performing heat treat, which provides a finer grain structure?
Normalizing
When performing heat treat, which process does not refine the grain structure?
A) annealing
B) normalizing
C) stress relieving
D) quenching and tempering
C) stress relieving
Quenching is used to achieve a higher toughness.
True or false
Falsd
What is the difference between annealing and normalizing?
Normalized material is air cooled
What is stress relieving?
Equalization and stabilization of any residual stresses without any refinement of the grain structure.
How many classifications of steel types are covered by CSA G40.21?
Seven
Which organization is a professional society of engineers in the field of ground, air and space transportation?
SAE
Which organization is an association of steel producers that issues steel specifications and co operates with SAE in using the same numbering system?
AISI
Which organization is a professional society of mechanical engineers that issues codes for boilers and pressure vessels?
ASME
CSA standards cover materials used for pressure equipment.
True or False
False
Under the SAE and AISI systems, each steel is given a four- digit numerical index that relates to its composition. Which digit indicates the sub-class (which is often the percentage of major alloying element)?
The second digit
What are the challenges when trying to identify materials using a colour coding method?
There can be loss of the marking from damage and marking systems are not standardized.
An MTR includes material colour coding information.
True or false
False
What indicates that a steel has been hot rolled?
Black mill scale
Which two metals have a white fracture surface?
Aluminum and lead
What cast irons have a melting point of 1260•C?
Grey, white, malleable
What metal distorts when heat is applied?
Magnésium
What metal has a light straw colour when oxidized?
Titanium
Which metal is magnetic and has a 1500•C melting point?
Steel
During a spark test, __________ produce orange lines, ending in pear shaped globules. There is very little branching and there are few carbon bursts.
High speed or cutting steels
What type of test is important for helping to identify a metals susceptibility to hydrogen cracking?
A hardness test
In the basic oxygen furnace, what does the term basic refer to?
The chemical nature of the refractory lining of the furnace
Wire, certain grades of pipe, and some machining steels can be produced by the ___________ process.
Bessemer converter
The highest quality of steel is produced through the use of a what?
Electric furnace
What type of furnace is made of bricks and burns by heating gas?
Open hearth furnace
What type of furnace blows oxygen into Liquid Metal?
Basic oxygen furnace
What type of furnace produces the highest quality of steel?
Electric furnace
What furnace has high production rates at lower costs?
Bessemer converter
What type of steel ingot process offers an excellent rolled surface finish?
Rimmed steel
Steels either a carbon content greater than _____% will originate from fully killed steels?
0.3%
What type of steel is similar to rimmed steel with less segregation of impurities?
Capped steel
Which type of steel may be susceptible to lamination issues after rolling?
Killed steel
What type of finished product is a billet considered to be?
Semi finished
Pre-coated steels cannot be coated with paint.
True or false
False
Cold-rolled material is typically worked below the material’s __________ temperature range.
Recrystallized
What type of pipe is formed in ‘U’ shaped presses?
Large diameter
What type of pipe is formed using rollers and a piercing mandrel?
Seamless pipe
What type of pipe is welded with the ERW process?
Seamed pipe
What type of casting process requires a high volume of production to make the process economical?
Die casting
Which casting process offers a smooth surface finish?
Die casting
