METAL PROPERTIES, CHAR, USES, AND CODES - OD1643 - LESSON 1/TASK 1
(c) Limitations.
Molybdenum can only be welded in an atomic
hydrogen arc, or butt welded by resistance heating in vacuum. It is
attacked by nitric acid, hot sulfuric acid, and hot hydrochloric
acid.
(9) Nickel. The chemical symbol for nickel is Ni. It was first
extracted from a copper-colored mineral named "kupfer nickel." Today
it comes from sulfide, oxidized, and arsenical ores.
Nickel is a
grayish-white metal, very ductile, and malleable.
(a) Uses. Most nickel is used in the production of ferrous and
nonferrous
Chemical
and
food
processing
equipment,
electrical resistance heating elements, ornamental trim, and parts
subjected to elevated temperatures are all produced from nickel-
containing metals. It is used as an alloy agent in the manufacture
of stainless steel.
(b) Capabilities.
Nickel alloys are readily welded by either
the gas or arc methods.
It can be machined, forged, cast, and easily
formed.
Nickel cannot withstand heat above 600
(c) Limitations.
Fahrenheit in a sulfidizing atmosphere.
It oxidizes very slowly in
the presence of moisture or corrosive gases.
(10) Tin.
The chemical symbol for tin is Sn, and it is derived
from the oxide cassiterite.
It is a very soft, malleable, somewhat
ductile, corrosion resistant metal, having low tensile strength and
high crystalline structure.
(a) Uses.
Its major application is in the coating of steel,
and in the manufacture of containers for the preservation of
perishable food.
It is used in the form of foil for wrapping food
products.
It is also used as an alloying agent with copper to
produce tin brasses and bronzes, with lead to produce solder, and
with antimony and lead to form babbit.
(b) Capabilities.
Tin can be cast, cold-worked, machined, and
soldered.
(c) Limitations.
Tin is not weldable.
(11) T i t a n i u m .
The chemical symbol for
titanium
is Ti.
It was
discovered as the white
metallic
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