Green Titanium Medical Screws Hex Socket Cap Half Thread DIN912 M10 × 55

Green Titanium fasteners hex socket cap screw half thread DIN912 M10 × 55

I. Properties of titanium

  As a metal, titanium is recognized for its high strength-to-weight ratio. It is a strong metal with low density that is quite ductile (especially in an oxygen-free environment), lustrous, and metallic-white in color. The relatively high melting point (more than 1,650 °C or 3,000 °F) makes it useful as a refractory metal. It is paramagnetic and has fairly low electrical and thermal conductivity.

  Commercially pure (99.2% pure) grades of titanium have ultimate tensile strength of about 434 MPa (63,000 psi), equal to that of common, low-grade steel alloys, but are less dense. Titanium is 60% denser than aluminium, but more than twice as strong as the most commonly used 6061-T6 aluminium alloy. Certain titanium alloys (e.g., Beta C) achieve tensile strengths of over 1,400 MPa (200,000 psi). However, titanium loses strength when heated above 430 °C (806 °F).

  Titanium is not as hard as some grades of heat-treated steel; it is non-magnetic and a poor conductor of heat and electricity. Machining requires precautions, because the material can gall unless sharp tools and proper cooling methods are used. Like steel structures, those made from titanium have a fatigue limit that guarantees longevity in some applications.

  Like aluminium and magnesium, titanium metal and its alloys oxidize immediately upon exposure to air. Titanium readily reacts with oxygen at 1,200 °C (2,190 °F) in air, and at 610 °C (1,130 °F) in pure oxygen, forming titanium dioxide. It is, however, slow to react with water and air at ambient temperatures because it forms a passive oxide coating that protects the bulk metal from further oxidation. When it first forms, this protective layer is only 1–2 nm thick but continues to grow slowly; reaching a thickness of 25 nm in four years.

II. Specification

III. Competitive advantages to other fasteners

1. Light weight [Specific gravity]: 60% of specific gravity of steel and about 1.7 times that of aluminum
2. Low thermal expansion [Thermal expansion coefficient]: ne-half that of 18-8 stainless steel and one-third that of aluminum
3. Low hear conductivity [Heat conductivity]: nearly the same as 18-8 stainless steel
4. Low electric conductivity [Electric conductivity]: about 3% of copper
5. High flexibility [Longitudinal elastic modulus]: one-half of iron or stainless steel and the same as copper
6. Non-magnetism [Magnetic permeability]: non-magnetic material; magnetic permeability=1.0001