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![]() 6AL-4V ELI Titanium Round Rod / Bar .8125" dia. x 36" US $121.20
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6al 4v Titanium Bar
Titanium: New Technologies For Better Bicycles
The fourth most common metal and ninth of the 9 elements that account for over ninety nine percent of the mass of the earths crust, titanium is not really unobtanium, notwithstanding its reputation. However , getting titanium out of the earth and turning it into bike parts takes a vast amount of energy. Part of titaniums mythical appeal is in the proven fact that its strength-to-weight ratio surpasses any other metal, and it is highly resistant to corrosion.
Named for the Titans of Greek mythology, the tensile strength of some common titanium alloys approaches that of high-strength steels and far surpasses that of aluminium, without being crisp. Maybe more importantly, titanium, like steel and unlike aluminum and magnesium, has a fatigue limit, meaning that if the stresses are kept below that amount, it'll never fail from fatigue. Its a high fatigue limit at that, thanks to its high tensile strength. The Youngs modulus ( rigidity index ) of titanium is around half that of steel, but so is its density. Titaniums density is high enough that tubes can't be made as stiff for a similar weight as aluminium or magnesium ones, because heavier walls are required to stop buckling with massive diameter.
The anti corrosive properties of titanium are striking. Nuclear submarines are made from it so they wont corrode in caustic sea environments, and unpainted titanium bikes and elements simply dont rust. Titanium is not crisp either ; it can be stretched around twice so far as steel and four times as far as aluminum then was permanently deformed. This gives titanium frames survivability in crashes, since they'll be much more likely than others to spring back after impact. Eventually, the ride of a titanium bike is generally smooth, because a frame designer can select thin tube diameters and wall thicknesses to offer a supple ride without losing longevity.
Due to titaniums capability to stretch and return to its original shape, drawing it into tubing demands larger and more powerful machines than those needed to draw steel tubing. Welding needs enclosure in an inert-gas atmosphere, and weld contamination must further be prevented thru careful cleaning. Machining titanium needs very pointed tools and particular speeds and lubricants ; copper-laden lubricants are used on titanium threads, and it's not counseled to thread titanium parts into one another.
Titanium excels for bike frame tubing and dropouts as well as for light-weight bolts, axles and saddle rails.
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