Grade 4 Titanium Disk

Grade 4 Titanium Disk is a high-strength, commercially pure titanium form that stands out for its superior tensile performance, corrosion resistance, and biocompatibility. It possesses the highest strength among unalloyed titanium grades while maintaining adequate ductility, which makes it ideal for high-load biomedical and aerospace structures. Common applications include orthopedic prosthetics, dental anchors, and surgical tools, particularly those requiring durability in load-bearing roles. Functionally, the disk can be electrochemically polished and coated with thin TiO₂ layers using atomic layer deposition (ALD), enhancing hemocompatibility for cardiovascular implants and blood-contacting devices. Advanced processing like severe plastic deformation followed by optimized heat treatment improves strength-to-weight ratios without compromising microstructural stability. This disk's microstructure—refined via rotary swaging and recrystallization—enables controlled grain morphology, impacting both mechanical integrity and fatigue resistance. As a substrate for functional surface engineering, Grade 4 titanium drives innovation in implantable technologies and structural biomaterials.

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Tolerance

Properties

Reference & Citations

each

Tolerances

Disc

Thickness	>0.05mm	±10%
Thickness	<0.01mm	±25%
Thickness	0.01mm - 0.05mm	±15%

Material Properties for Metals

Atomic Properties

Element	Value
Atomic number	22
Crystal structure	Hexagonal close packed
Electronic structure	Ar 3d² 4s²
Valences shown	2,3,4
Atomic weight( amu )	47.88
Thermal neutron absorption cross-section( Barns )	6.1
Photo-electric work function( eV )	4.1
Natural isotope distribution( Mass No./% )	50/ 5.3
Natural isotope distribution( Mass No./% )	49/ 5.5
Natural isotope distribution( Mass No./% )	46/ 8.0
Natural isotope distribution( Mass No./% )	48/ 73.7
Natural isotope distribution( Mass No./% )	47/ 7.5
Atomic radius - Goldschmidt( nm )	0.147
Ionisation potential( No./eV )	3/ 27.5
Ionisation potential( No./eV )	4/ 43.3
Ionisation potential( No./eV )	5/ 99.2
Ionisation potential( No./eV )	1/ 6.82
Ionisation potential( No./eV )	2/ 13.6
Ionisation potential( No./eV )	6/ 119

Mechanical Properties

Element	Value
Material condition	Polycrystalline
Material condition	Annealed
Poisson's ratio	0.361
Poisson's ratio	0.361
Poisson's ratio	-
Bulk modulus( GPa )	108.4
Bulk modulus( GPa )	-
Bulk modulus( GPa )	108.4
Tensile modulus( GPa )	-
Tensile modulus( GPa )	120.2
Tensile modulus( GPa )	120.2
Izod toughness( J m⁻¹ )	61
Izod toughness( J m⁻¹ )	61
Hardness - Vickers( kgf mm⁻² )	60
Hardness - Vickers( kgf mm⁻² )	60
Tensile strength( MPa )	230-460
Tensile strength( MPa )	230-460
Yield strength( MPa )	140-250
Yield strength( MPa )	140-250

Electrical Properties

Element	Value
Electrical resistivity( µOhmcm )	54@20@20°C
Superconductivity critical temperature( K )	0.4
Temperature coefficient( K⁻¹ )	0.0038@0-100°C

Physical Properties

Element	Value
Boiling point( C )	3287
Density( gcm⁻³ )	4.5@20°C

Thermal Properties

Element	Value
Melting point( C )	1660
Latent heat of evaporation( J g⁻¹ )	8893
Latent heat of fusion( J g⁻¹ )	365
Specific heat( J K⁻¹ kg⁻¹ )	523@25°C
Thermal conductivity( W m⁻¹ K⁻¹ )	21.9@0-100°C
Coefficient of thermal expansion( x10⁻⁶ K⁻¹ )	8.9@0-100°C