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TITANIUM
INFO
OVERVIEW:
Titanium, the worlds 4th most abundant
structural metal, was first isolated almost 200 years ago and was appropriately
named after the powerful mythological first sons of the earththe
Titans. The titanium industry as we know it today is just 40 years old.
Only recently has mainstream production become technically and economically
feasible. Although titanium (Ti) is the 9th
most abundant element, constituting about 0.63% of the Earths
crust, it is expensive to process and requires state-of-the-art manufacturing
machinery, and skilled, knowledgeable engineers and machinists to fabricate
finished products.
ALLOYS:
When discussing titanium, one must realize that Ti can take many different
forms (alloys). Ti combines well with most metals and, depending on
the recipe used to create the soup (alloy), Ti can exhibit
any number of characteristics in a variety of applications. For example,
the commercially pure (CP) alloy, which is roughly 99% titanium,
is relatively soft. Conversely, the alloy commonly known as Ti64
(Ti-6% Aluminum-4% Vanadium) is commonly used as a lightweight substitute
for steel. While the strength of 316 stainless steel is about 70,000
psi, Ti64 has a tensile strength of approximately 135,000 psi. In short,
a variety of Ti alloys are available, but selecting the proper alloy
for a given application depends on the desired attributes of the finished
product. The key to utilizing its unique properties is more in product
design, rather than simply substituting titanium for another metal.
MECHANICAL CHARACTERISTICS:
On average (depending on the specific alloy), Ti is as strong as steel,
yet 40% lighter. It is immune to corrosion from salt water and most
industrial and organic chemicals. Also, it is a "self-healing"
metal, meaning that scratches/abrasions on the surface finish are immediately
healed in the presence of oxygen or water (no oxidation
or rust). Depending on the product design, heat treatment, and alloy
used, Ti can be soft or hard, flexible or stiff, as heavy as steel,
or as light as aluminum. In short, it is a versatile material which
can exhibit a variety of mechanical properties. For example, Ushbas
new Ti-Spec alloy offers an increase in strength which
is nearly double of that found in previous Ti screws (65 ksi/450 Mpa
for Ti-Spec compared to 35 ksi/240Mpa for generic Ti)!
USHBAS
TITANIUM PROGRAM: Ushba
views titanium as a viable, and often superior, material for climbing
and safety equipment because lightweight, reliability, and strength
are critical. The production facilities, physicists, engineers, and
machinists we work with are experienced, knowledgeable and use specialized
tools and state-of-the-art machinery to produce Ushbas
titanium equipment. And, the products are designed and created by climbers.
We purchase our titanium materials from a producer which is certified
by more than 520 world-recognized quality-control standards including
ISO 9000, ASTM, and various aerospace certifications. In fact, companies
such as GE, Pratt and Whitney, Rolls Royce and others also purchase
materials for their critical components (jet turbines, for example)
from these same facilities.
FAQs
1) Have
the products of Ushba been tested? Yes. Initial
laboratory strength-tests are first performed during the prototype stage.
Then, at the conclusion of the field-testing phase, additional testing
takes place at an independent, certified laboratory in the United States.
These tests are performed using methods and criteria which meet or exceed
current standards (CE, UIAA, etc.). For applicable products,
we go a step further by submitting them to an authorized testing facility
in Europe for full certification as per European Norms (CE Norms).
Currently, this final step is in progress for several of the new offerings.
Yes, the gear does meet or exceed the standards. For example, the CE
Norms for ice screw strength is 10 kN; the new Ultimate Ice Screw
withstands forces in excess of 17 kN (+3800 lb)! Comparable strengths
can be found with other Ushba products as well. Lab testing is
great, but we continue our testing regimen in the real world via ongoing
field-testing by some of the worlds top climbers.
2) Is it true that titanium
becomes brittle when cold? No.
In fact, unlike steel and aluminum, the bond of the molecular structure
of titanium actually becomes stronger as the temperature drops. This
is a common misconception about Ti climbing equipment--- it is not inherently
brittle.
3) Is it true that steel
screws place easier than Ti screws? Not necessarily.
The ease of placement of ice screws is a function of design rather than
the material utilized. Until recently, the general perception of Ti
ice screws as "leavers" has been as a result of cheap, sub
par designed and machined "gray-market" screws, of dubious
origin, originating from behind the Iron Curtain. Although Ti screws
are almost half the weight of steel screws, it is still the design that
makes the difference. To experience the difference that design attributes
can make, try the new Ushba Ultimate Screw and Pound-In
which utilize the stronger/more durable Ti-Spec alloy.
4) Is it true that Ti
is susceptible to work-hardening and stress/fatigue cracks?
Titanium exhibits work-hardening rates which are less than steel, and
Ti actually has a higher fatigue strength. Regardless, the occurrence
of work-hardening is more a function of machining expertise (or lack
thereof) than the material itself. Related to this, the proper heat-treating
and machining of Ti, as with any metal, is critical in order to avoid
stress and fatigue cracks. Further, fatigue-strength is not as great
of a problem as one might think when it comes to Ti climbing equipment.
To illustrate this, Ti aircraft/spacecraft components, for example,
may be subjected to roughly 100,000 to 1,000,000 or more cycles
per flight, whereas climbing equipment might be subjected
to only 100 to 1,000 cycles per lifetime.
5) Why doesnt
Ushba make a titanium carabiner? Ti is strong,
lightweight, and versatile. However, the technology of bending titanium
rods to an angle greater than 90 degrees (as would be needed to fabricate
a carabiner) has been elusive. Of course, a carabiner could be made
from a cast-molding, but it is difficult to control the crystalline
structure of Ti when it is re-heated to the melting point. Besides,
aluminum biners are very light, strong, affordable, and dependable.
Ti carabiners do exist, however their attributes are often inappropriate
for climbing applications, and the quality control employed to date
has not yet satisfied Ushbas standards.
6) I have been buying
Ti ice screws for years, paying as little as $5/screw. Why are Ushbas
ice screws expensive? Ushba does not economize
when it comes to a climbers safety. Sub par screws will continue
to trickle into the West as long as climbers and speculators continue
to purchase gray-market screws. While most of those screws are probably
O.K. from a safety standpoint, dont expect stellar performance.
Ushbas screws combine special titanium alloys and designs
that put them on par with the finest steel screws available; these are
not "leaver" pieces. Thankfully, the new market economies
of Eastern Europe have all but eliminated the speculative nature of
gray-market climbing products. Whether or not you decide to purchase
Ushba products, buy your Ti gear only from established and reputable
companies. It is also important to note that Ushbas material
costs are higher than those who work primarily with steel and aluminum.
For example, the cost of carbon steel is about .25 cents per pound whereas
Ti costs between $10 to $15 per pound. Consumers should also know that
Ushba products are often more expensive than comparable products
because we do not cut corners when it comes to safety, quality materials,
state-of-the-art machining, and a very skilled production team.
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