WorksheetsACRM: Nonferrous Metals
Total questions: 57
Worksheet time: 29mins
Largely aluminum oxide mixed with impurities. An electrolytic process is used to obtain aluminum from that oxide
Bauxite
Pearlite
Austenite
Cementite
When aluminum is mixed with zinc, the resultant alloy is as strong as steel with only:
1/2 the weight
1/3 the weight
1/4 the weight
1/5 the weight
For wrought alloys, the major alloying element for 6xxx series is
Magnesium
Silicon
Magnesium and Silicon
Chromium
1030 aluminum:
has 99.30% pure aluminum content
has 0.30% pure aluminum content
has 0.30% impurity
has more than 99.30% pure aluminum content
The second digit of the 2024 aluminum alloy:
indicates the major alloying element
indicates the modification of alloy
indicates the arbitrary alloy designation
indicates zero amount of cladding
Offers high corrosion resistance, excellent thermal and electrical properties, and is easily worked. However, it is very low in strength
1xxx
2xxx
3xxx
4xxx
Metallic changes take place on the grain structure of this resultant alloy; beneficial and produces greater strength. However, the drawback is their susceptibility to intergranular corrosion when improperly heat treated
1xxx
2xxx
3xxx
4xxx
Generally considered non heat treatable. Its most common variation offers moderate strength and has good working characteristics
3xxx
4xxx
5xxx
6xxx
When alloyed, it lowers a metal's melting temperature. This results in this alloy that works well for welding and brazing
3xxx
4xxx
5xxx
6xxx
These alloys possess good welding and corrosion resistance characteristics. However, if exposed to high temperatures or excessive cold working, its susceptibility to corrosion increases
4xxx
5xxx
6xxx
7xxx
This alloys are heat treatable, and has medium strength with good forming and corrosion resistance properties
4xxx
5xxx
6xxx
7xxx
These alloys are made harder and stronger, but makes it difficult to bend
4xxx
5xxx
6xxx
7xxx
Clad consists of:
a thin layer of pure aluminum with 1% zinc
a thin layer of pure aluminum with 2% zinc
a thin layer of pure aluminum with 3% zinc
a thin layer of pure aluminum with 4% zinc
Thickness of clad layers:
is about 1 or 2 percent of material thickness
is about 2 or 4 percent of material thickness
is about 3 or 5 percent of material thickness
is about 1 percent of material thickness
is the most common and is used for complicated shapes or where only a few parts are required
Sand casting
Permanent mold casting
Die casting
Case hardening
A metal mold is used which permits the making of many parts with better accuracy.
Sand casting
Permanent mold casting
Die casting
Semipermanent mold casting
is used when small parts must be made and held to close tolerances
Sand casting
Permanent mold casting
Die casting
Micro casting
W temper designation:
indicates an annealed temper
indicates that it is strain hardened
indicates that it is solution heat treated
indicates that it is heat treated to produce stable tempers other than F, O, or H
A 6th degree of hardening for non heat treatable alloys indicates
1/4 hardness
3/4 hardness
6 percent hardness
6/8 hardness
A 9th degree of hardening for non heat treatable alloys indicates
1/9 hardness
9/10 hardness
full hardness
extra hardness
H2
Strain hardened, then partially annealed to remove some of the hardness
Strain hardened produced by cold working the metal to the desired dimension
Strain hardened, then stabilized
Strain hardened, cold worked, artificially aged
H1
Strain hardened, then partially annealed to remove some of the hardness
Strain hardened produced by cold working the metal to the desired dimension
Strain hardened, then stabilized
Strain hardened, cold worked, artificially aged
Cooled from an elevated temperature shaping process and artificially aged
T1
T5
T10
T6
Solution heat treated, artificially aged, and cold worked
T8
T9
T10
T11
Solution heat treated and naturally aged
T3
T4
T2
T1
Additional temper designation: without S
Wrought alloy
Cast alloy
Wrought alloys produced by Reynolds Metals Company
Intermediate heat treatment
Additional temper designation: S
Wrought alloy
Cast alloy
Strain hardened
Heat treated and strain hardened
Additional temper designation: W
Wrought alloy
Cast alloy
Wrought alloys produced by Reynolds Metals Company
Intermediate heat treatment
Additional temper designation: SRT
Wrought alloy
Cast alloy
Strain hardened
Heat treated and strain hardened
Alloys such as 2017 and 2024, develop their full properties as a result of solution heat treatment followed by about
1 day of cooling, or aging, at room temperature
2 days of cooling, or aging, at room temperature
3 days of cooling, or aging, at room temperature
4 days of cooling, or aging, at room temperature
Works by accelerating the aging process by cooling at an elevated temperature
Solution heat treatment
Precipitation heat treatment
Natural aging
Annealing
The time that elapses between the removal of an alloy from the furnace and the quench:
should not be more than 5 seconds
should not be more than 10 seconds
should not be more than 15 seconds
should not be more than 30 seconds
Commercially pure aluminum and 3003 metals:
do not benefit from heat treatment
benefit from heat treatment
have a great deal of strength so no treatment is required
have their use in structural components in aircraft
The most important non heat treatable aluminum alloy. It contains 2.5 percent magnesium and a small amount of chromium. It is used for welded parts such as gasoline or oil tanks, and for rigid fuel lines. Its strength is increased by cold working
Alloy 5050
Alloy 5052
Alloy 5054
Alloy 5056
Due to the increased diffusion of core material into the cladding, clad material is generally limited to no more than:
one reheat treatment
two reheat treatments
three reheat treatments
four reheat treatments
Magnesium weighs:
1/3 as much as aluminum
2/3 as much as aluminum
the same with aluminum
greater than aluminum
Developed a classification system for magnesium alloys that consists of a series of letters and numbers to indicate alloying agents and temper condition
Society of Automotive Engineers
Society of Aerospace Engineers
American Society for Testing Materials
Reynolds Metals Company
Magnesium alloying element: H
Rare earth
Thorium
Zirconium
Hydrogen
Magnesium alloying element: K
Potassium
Calcium
Zirconium
Krypton
Titanium crystal structure for all around performance, good weldability, tough and strong both cold and hot, and resistant to oxidation
A (alpha)
B (beta)
C (combined A&B for compromise performance)
G (gamma)
Titanium crystal structure for bendability; excellent bend ductility, strong both cold and hot, but vulnerable to contamination
A (alpha)
B (beta)
C (combined A&B for compromise performance)
G (gamma)
Most commonly used titanium alloy that is an alpha-beta heat treated alloy
6Al-4V
4Al-6V
6V-4Al
4V-6Al
Monel contains about:
80 percent nickel, 14 percent chromium
14 percent nickel, 80 percent chromium
68 percent nickel, 29 percent copper
29 percent nickel, 68 percent copper
Inconel contains about:
80 percent nickel, 14 percent chromium
14 percent nickel, 80 percent chromium
68 percent nickel, 29 percent copper
29 percent nickel, 68 percent copper
A nickel alloy that can be welded and has good machining characteristics. It works well in gears and parts that require high strength and toughness, as well as for parts in exhaust systems that require high strength and corrosion resistance at elevated temperatures
Monel
K-Monel
Inconel
K-Inconel
A nickel alloy that finds frequent use in turbine engines because of their ability to maintain their strength and corrosion resistance under extremely high temperature conditions
Monel
K-Monel
Inconel
K-Inconel
Inconel has a similar appearance with:
Steel
Stainless steel
Magnesium
Manganese
To differentiate inconel and stainless steel, a test is used between unknown metal samples. The test involves applying:
one drop of cupric chloride and hydrochloric acid solution to the metal and allowing it to remain for two minutes
one drop of cupric chloride and hydrochloric acid solution to the metal and allowing it to remain for three minutes
one drop of caustic soda and hydrogen peroxide solution to the metal and allowing it to remain for two minutes
one drop of caustic soda and hydrogen peroxide solution to the metal and allowing it to remain for three minutes
The solution used to differentiate inconel and stainless steel will show:
a shiny spot for inconel and copper-colored spot for stainless steel
a copper-colored spot for inconel and a shiny spot for stainless steel
a shiny spot for inconel and rust-colored spot for stainless steel
a rust-colored spot for inconel and a shiny spot for stainless steel
A copper alloy containing zinc and small amounts of aluminum, iron, lead, manganese, magnesium, nickel, phosphorus, and tin
Bronze
Beryllium copper
2024 alloy
Brass
Zinc content of brass that is very ductile
30 to 35 percent
45 percent
45 to 50 percent
40 to 45 percent
A copper alloy containing tin
Brass
Bronze
Beryllium copper
2024 alloy
True bronze contains:
up to 15 percent tin
up to 20 percent tin
up to 25 percent tin
up to 50 percent tin
For tube fittings, bronzes:
of less than 9 percent tin are used
of less than 10 percent tin are used
of less than 11 percent tin are used
of more than 10 percent tin are used
Beryllium copper consists of:
1 percent beryllium
2 percent beryllium
3 percent beryllium
4 percent beryllium
A copper alloy extremely useful for diaphragms, precision bearings and bushings, ball cages, and spring washers
Brass
Bronze
Beryllium copper
Brass and Bronze
A copper alloy used in bushings, bearings, fuel-metering valves, and valve seats
Brass
Bronze
Beryllium copper
Brass and bronze
