Gr2 Gr5 Gr7 ASTM B348 Titanium Bar Titanium Rod Titanium Round Bar
For Medical Applications
Grade 5 (Ti-6Al-4V) and Grade 9 (Ti-3Al-2.5V) titanium alloys are
both widely used in various industries, including medical
applications, aerospace, and sports equipment. While both offer
excellent strength-to-weight ratios, corrosion resistance, and
biocompatibility, there are some key differences between these two
grades.
Gr2 Titanium (Grade 2):
Grade 2 titanium is commercially pure titanium, known for its
excellent corrosion resistance, high strength-to-weight ratio, and
biocompatibility. It is commonly used in medical applications such
as implants, surgical instruments, and prosthetics due to its
ability to withstand harsh bodily environments without corroding.
Gr2 is a versatile and highly stable material that is widely
accepted for medical devices that require durability and resistance
to corrosion.
Gr5 Titanium (Grade 5):
Grade 5, also known as Ti-6Al-4V, is an alloy of titanium with 6%
aluminum and 4% vanadium. It is the most commonly used titanium
alloy and offers excellent strength, good corrosion resistance, and
high fatigue resistance. In medical applications, Grade 5 titanium
is used in joint replacements, dental implants, and orthopedic
devices because of its higher strength compared to Gr2 while
maintaining biocompatibility and lightweight properties.
Gr7 Titanium (Grade 7):
Grade 7 titanium is an alloy of pure titanium with a small amount
of palladium (about 0.12%-0.25%), which significantly improves its
corrosion resistance, particularly in highly corrosive
environments. Gr7 is often used in medical applications where
exceptional corrosion resistance is required, such as in implants
and surgical instruments that are exposed to prolonged contact with
bodily fluids, especially in harsh conditions.
ASTM B348 Standard for Titanium Bars, Rods, and Round Bars:
ASTM B348 is the standard specification for titanium and titanium
alloy bars, rods, and round bars for various applications. It
includes mechanical and chemical requirements, dimensions, and
tolerances to ensure high-quality material for applications
requiring high performance, especially in medical fields.
Medical Applications of Titanium Bars:
Titanium bars, rods, and round bars made from Gr2, Gr5, and Gr7 are
used in the production of medical implants, prosthetic devices,
bone fixation plates, spinal fusion devices, dental implants, and
surgical tools. These materials are chosen for their superior
combination of biocompatibility, strength, and resistance to body
fluids. The corrosion resistance of titanium allows medical devices
to last longer inside the human body without the risk of
degradation or infection.
Overall, Gr2, Gr5, and Gr7 titanium bars are essential materials in
the medical industry, offering various performance characteristics
suited to different surgical and implant needs. Their excellent
mechanical properties and biocompatibility make them suitable for
use in a wide range of implantable devices and medical treatments.
Advantages of Titanium Rods:
Titanium rods offer numerous advantages over traditional materials
like steel and aluminum. Here are some key benefits:
Biocompatibility: One of titanium's standout properties is its
biocompatibility. It is non-toxic and does not induce adverse
reactions in the human body, making it a preferred material for
medical implants, dental devices, and prosthetics. Its use in
healthcare continues to expand, driven by its safety and
effectiveness.
Non-magnetic: Titanium is inherently non-magnetic, making it an
ideal choice for applications in medical equipment, such as MRI
machines, where magnetic interference could disrupt functionality.
This property is crucial in ensuring the safety and accuracy of
medical imaging.
Strength: Titanium boasts a very high strength-to-weight ratio,
meaning it is stronger than steel while remaining significantly
lighter. This property is particularly beneficial in applications
where reducing weight is critical, such as in aerospace and
automotive industries.
Corrosion Resistance: The natural oxide layer on titanium provides
exceptional resistance to corrosion. This feature enables titanium
to perform reliably in harsh environments, including marine and
chemical applications, where other materials might degrade quickly.
Durability: Titanium is highly resistant to wear and tear,
significantly outlasting many other materials. This durability
translates to lower maintenance costs and longer service life in
various applications, from industrial machinery to consumer goods.
Aesthetics: Titanium has a unique and attractive appearance that
makes it popular in jewelry and decorative applications. Its
lustrous finish and ability to take on vibrant colors through
anodization have made titanium a fashionable choice for high-end
accessories.
Key Differences between Grade 2, Grade 5 and Grade 7:
| Property | Grade 2 (CP Ti) | Grade 5 (Ti-6Al-4V) | Grade 7 (Ti-0.2Pd) |
|---|
| Composition | Pure titanium (99% Ti) | Ti-6Al-4V (90% Ti, 6% Al, 4% V) | Ti-0.2Pd (99.8% Ti, 0.12%-0.25% Pd) |
| Strength | Moderate (50-70 ksi tensile) | High (130-160 ksi tensile) | Moderate (60-80 ksi tensile) |
| Corrosion Resistance | Excellent (for general environments) | Good (better in non-acidic environments) | Excellent (especially in acidic environments) |
| Fatigue Resistance | Good | Excellent | Good |
| Biocompatibility | Excellent (ideal for medical implants) | Excellent (used in implants and prosthetics) | Excellent (ideal for medical implants) |
| Applications | Medical implants, marine, aerospace, chemical | Aerospace, medical implants, structural components | Medical implants, corrosive environments, chemical processing |
| Cost | Lower | Higher (due to alloying elements) | Higher (due to palladium addition) |
Specifications of Titanium Grades:
| Titanium Grade | Round Bar Standards |
|---|
| Titanium Grade 1 | ASTM B348, ASME SB-348, EN 10204.31 |
| Titanium Grade 2 | ASTM B348, ASTM B381, ASTM F67, ASME SB-348 |
| Titanium Grade 4 | AMS 4921, ASTM B348, ASTM F67, AMS-T-9047 |
| Titanium 6Al-4V Grade 5 | AMS 2631D, AMS 4928, AMS 4965, AMS 6930, AMS 6931, ASTM B348,
AMS-T-9047, ASME SB-381 |
| Titanium 6Al-4V Grade 23 ELI | AMS 2631, AMS 4930, AMS 6932, ASTM F67, ASTM F136, ASTM B348 |
| Titanium Alloy 6Al-2Sn-4Zr-6Mo | AMS 2631, AMS 4981 |
