DIVISION 5: Metals Flashcards by Pearley Correa

This are substances all of which are crystalline when solid and many of which are characterized by opacity, ductility, and unique luster when freshly fractured

METAL

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It is a forming process of metal which produces new cross section of the material while improving its mechanical properties through the use of rotating rolls

ROLLING

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It is a method of forming metal that is controlled, plastic deformation or working metals into predetermined shapes by means of pressure or impact blows or both

Forging

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This is a metal forming process involving pulling a workpiece through a die providing reduction of the cross section of the workpiece

DRAWING

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This metal forming process is also known as pressing which uses variety of sheet metal forming manufacturing processes.

STAMPING

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This metal forming process that shapes the material by forcing it to flow through a shaped opening in a die and emerges as an elongated piece with the same profile as the die

EXTRUSION

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This metal forming process involves pouring liquid metal into a mold, which contains a hallow cavity of the desired shape and them allowing it to cool and solidify

CASTING OR MOLDING

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A type of metal that is silvery non magnetic and soft, also characterized by it light weight, low melting point, high thermal and electrical conductivity, and moderately high coefficient of expansion

ALUMINUM

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It is an accelerated corrosive action that takes place when dissimilar metals are in contact in the presence of an electrolyte

GALVANIC ACTION OR GALVANIC CORROSION

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Term refers to the protective coating (cladding) applied, primarily for corrosion resistance, to thin sheets of an alloy whose corrosion resistance is decreased by the constituents added to give strength

ALCLAD

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Types of aluminum used for roofing, flashing gutter, etc.

ALUMINUM SHEET AND STRIP

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It is a type of aluminum that is rolled to a thickness of 0.005” and is used mainly for thermal insulation and vapor barriers

ALUMINUM FOIL

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It is a type of aluminum that is rigidized sheet fabricated of special aluminum alloy specifically developed for roofing and siding purposes

CORRUGATED ALUMINUM

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It a type of aluminum that is use as a structural material, extruded therefore can be produced economically to meet the specified structural design requirements

STRUCTURAL ALUMINUM

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Type of aluminum that are pre fabricated units which are generally manufactured on modular or non modular window width dimensions for the exterior of buildings

ALUMINUM PANELS

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Type of aluminum that comprises a system of construction called skin construction

SANDWICH PANEL

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ACP is a type of flat panel that consists of 2 thin aluminum sheets blinded to a non aluminum core. What is the meaning of ACP?

Aluminum Composite Panel

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Other term for ACP

ACM ( Aluminum Composite Material)

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This is used to coat the aluminum sheets making it very rigid and strong despite its light weight.

PVDF (Polyvinylidene Flouride) or POLYESTER PAINT

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This core for aluminum sheets is an insulating material no less than 10 cm thick when its use is refrigeration insulation

Low density Polyethylene

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Type of aluminum used for fencing, particularly chain link fencing and insect screening

ALUMINUM MESH AND WIRE CLOTH

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Give the 6 basic type of aluminum finish.

MECHANICAL FINISH
CHEMICAL FINISH
ELECTROLYTIC FINISH
ELECTROPLATING
PORCELAIN OR VITREOUS ENAMEL
PAINT

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What type of paint is not to be used on aluminum?

LEAD BASED PAINTS

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Pure of its kind is tough, malleable silvery white metal that is soft and ductile as copper, easily magnetized and is the most magnetically permeable of the metals, what kind of metal is it?

IRON

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A commercial form in which iron is first prepared

CRUDE OR PIG IRON

It is an iron-carbon iron that is poured while molten into forms. Often used in architectural field mainly for piping and fittings, ornamental iron work, hardware, etc

CAST IRON

Name two generally used types of cast iron.

GRAY CAST IRON AND MALLEABLE CAST IRON

It is almost pure iron and is characterized as soft, malleable, tough, fatigue-resistant, and resistant to progressive corrosion.

WROUGHT IRON

This is defined as alloy of iron and carbon which do not contain more than 2% carbon and which are made in malleable or ingot form.

STEEL

Why can't galvanized pipe used as gas pipes?

Flaking of zinc sometimes causes the pipe to burst

These pipes have a high resistance to fire and heat which is why they are also used for fire sprinklers. Often it is also used as gas line.

BLACK PIPE

Which type of steel is used as structural steel, reinforcement for concrete, corrugated steel, steel mesh and wire cloth, steel windows and door, and hardware?

WROUGHT CARBON STEELS

These are type of steel which has added manganese, silicon, aluminum, titanium and molybdenum in insufficient quantity to produce unobtainable to carbon steels.

ALLOY STEELS

What are the group of trade name steels with improved mechanical properties and resistance to atmospheric corrosion?

HIGH-STRENGTH LOW-ALLOY STEELS

These are highly alloyed steels that contain more than 10% chromium, and used for their resistance to heat, oxidation and corrosion

STAINLESS STEEL

What type of metal is ductile, malleable, non magnetic metal with a characteristic of bright, reddish brown in color?

COPPER

What metal has the highest electrical and thermal conductivity of any substances except silver?

COPPER

What do you call the green color reaction to corrosion due to the exposure of copper to air and salt water?

PATINA

What type of metal is soft, ductile, malleable, and bluish-white in color, normally covered with a thin film of stannic oxide?

TIN

What is this of type of metal that is medium hard, bluish-white metal that is characterized by brittleness and low strength?

ZINC

What are the uses of zinc?

* protective coatings on iron and steel * die-casting metal * alloying element in brasses

It is the most common galvanized material used in architecture and is available in flat or corrugated?

GALVANIZED IRON (STEEL) SHEET AND STRIP

What are the situations that causes galvanized sheet to become defaced and discolored?

* DAMPNESS | * EXTREMES IN TEMPERATURES

What kind of metal is an alloy of copper and zinc with small quantities of other elements sometimes added to give the special qualities?

BRASS

What kind of metal is a rich golden-brown metal, originally worked by forging and particularly suited for casting since it is corrosion resistant, dense and hard enough for a mold?

BRONZE

True bronze is an alloy of _____ and _____.

COPPER; TIN

It is a steel-white metal which take a brilliant polish and is harder than cobalt or nickel?

CHROMIUM

One of the most commonly encountered usage of chromium in architecture?

PLATING

What is an inert silvery metal that is resistant to strong alkalies and to most acids, resembles iron in strength and toughness?

NICKEL

What is a blue-gray, soft, very heavy metal that is extremely workable and has a good corrosion resistance, used for pipes, rod, wire, and paint?

LEAD

What are the 4 method of joining metal?

* SOLDERING * BRAZING * WELDING * RIVETS

What is a method of joining metals used to make electrical connections, to seal joints hermetically them in with another, lower melting metal or alloy called the solder?

SOLDERING

What are the 4 usual methods of soldering?

* METAL BATH DIP SOLDER * SOLDERING IRON * TORCH * SWEAT METHOD

What is the metal-joining process where the work pieces to be joined are immersed in a pot of molten solder?

METAL BATH DIP SOLDER

What is metal-joining method the iron piece is preheated and applied to the joint along with the solder and the flux?

SOLDERING IRON

What is this metal-joining method which is limited to metal that can be heated without altering their characteristics, heated by torch flame?

TORCH

What is this metal-joining method of heating of the metals to be joined causes the solder to run the joint; often used for joining copper tubing and fittings;?

SWEAT METHOD

3 types of fluxing for soldering

* CORROSIVE * NEUTRAL * NONCORROSIVE

What is this fluxes are known to be an acid type and salt type fluxes that cannot be used for most electrical work?

CORROSIVE FLUXES

What is this mild type of fluxes that are used easily to solder metals and one of its example is stearic acid?

NEUTRAL FLUX

What is this type of fluxes that leaves residues which are non corrosive and non conductive and therefore need not remove? one principal type is called ROSIN

NONCORROSIVE FLUXES

This type of soldering is generally used if the shpe and position of the joint or the composition of metals are not adaptable to welding?

BRAZING

What type of soldering is a process by which two metals are so joined that there is an actual union of the inter atomic bonds?

WELDING

What are the two general type of welding? and what makes its weld?

* pressure welding (pressure and heat) | * fusion welding (heat and added metal)

What is the process of welding at elevated pressures, normally underwater, is called?

HYPERBARIC WELDING

These are the devices used to join or fasten metals using a metal cylinder on which it has a head at one end and then inserted on the protruding end that is flattened to tie the two piece together.

RIVETS

What are the most common reinforcement concrete that can be plain or deformed for better bonding to the concrete?

STEEL BARS OF ROD

What is the smallest and largest diameter of deformed round steel bars that are available in the market?

10; 36

What is the most generally used grade of steel bars are used architecturally?

INTERMEDIATE GRADE

What is the kind of concrete reinforcement that can be formed into various sheets shaped in diamond, crimp, herringbone, and Z-rib to name a few?

EXPANDED MESH

These are made of cold-drawn steel wire and is widely used for reinforcement of concrete slabs and floors, as well as stuccoed work?

WIRE FABRIC

These are used to reinforced concrete slabs used in lightweight constructions which consists of series of wire welded together to form a grid pattern.

WELDED WIRE FABRIC

This is a wire fabric that is built up of either single or stranded longitudinal wires with cross wires running diagonally across the fabric?

TRIANGLE MESH FABRIC

TRUE OR FALSE: The bright red rust that forms in a few days on reinforcement expose in rain is detrimental to the steel?

FALSE, except if the actual rust scales causes reduction to the cross section of the bar

What is a concrete containing fibrous material which increases its structural integrity of the concrete called?

FIBER- REINFORCED CONCRETE

TRUE OR FALSE: If a large quantity of reinforcement bars is stored at the site for an extended period; it is well to build shed over the storage racks?

TRUE