| ¡Ü Introduction
Titanium is well known for its excellent resistance to corrosion;
it is almost as resistant as platinum, being able to withstand attack
by acids, moist chlorine gas, and by common salt solutions. Pure
titanium is not soluble in water but is soluble in concentrated
acids. A metallic element, it is also well-known for its high strength-to-weight
ratio. It is a light, strong metal with low density that, when pure,
is quite ductile (especially in an oxygen-free environment), easy
to work, lustrous, and metallic-white in colour. The relatively
high melting point of this element makes it useful as a refractory
metal. Commercially pure grades of titanium have an ultimate tensile
strength equal to that of intermediate strength high strength low
alloy steels, but are 43% lighter; it is 60% heavier than aluminium,
but more than twice as strong as 6061-T6 aluminium alloy; these
numbers can vary quite substantially due to different alloy compositions
and processing variables. They are included as guidelines only.
This metal forms a passive and protective oxide coating (leading
to corrosion-resistance) when exposed to elevated temperatures in
air but at room temperatures it resists tarnishing. The metal, which
burns when heated in air 610 °C or higher (forming titanium
dioxide) is also one of the few elements that burns in pure nitrogen
gas (it burns at 800 °C and forms titanium nitride). Titanium
is resistant to dilute sulfuric and hydrochloric acid, along with
chlorine gas, chloride solutions, and most organic acids. It is
paramagnetic (weakly attracted to magnets) and has a very low electrical
resistivity and thermal conductivity.
- Welded titanium tube / pipe can be tested with many of the same
techniques used for steel tube and pipe. Eddy current test pneumatic
and ultrasonic testing all are applicable to Ti tube. The test methods
should be meet to ASTM B338 and to help ensure tube reliability.
- Grade 2 titanium is considered the workhouse of the titanium family
and is suitable to most of applications. If greater strength is
required, grade 3 and 12 tubing needed.
¡Ü Application
* Heat Exchanger
* Automotive components
* Cooling system parts
* Hydrocarbon refining processing
* Consumer goods
* Food processing parts
¡Ü Properties
of Various Nickel Alloy
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