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Grade 4 Titanium Foil/Sheet

Available Configurations

Properties common to all products in this list

Commodity: Metals Material: Titanium Form: Foil/Film/Sheet Composition: Ti Grade: Grade 4 CAS Number: 7440-32-6 Purity: 98.5% (1N85)
Thickness Width Length Temper ⓘ Standards Other Variant
0.1 mm to 0.25 mm 10 mm to 300 mm 10 mm to 300 mm As Rolled
Annealed
ASTM B265
ASTM B265 Chemistry Only
Light Tight
High Purity (≤ 99.999%)
Grade 1
Grade 2
Grade 3
Grade 7
Grade 12
Ion Implanted

Need custom configurations? Please contact us.

Explore our full research and engineering titanium range.

Grade 4 Titanium Foil (UNS R50700) is the strongest of the four commercially pure titanium grades, offering a typical yield strength of around 480–550 MPa in foil form — making it the right choice when the corrosion resistance and biocompatibility of CP titanium are needed alongside the highest available mechanical performance in this alloy family. Supplied to ASTM B265 and B265 Chemistry Only, it maintains a density of just 4.5 g/cm³ while delivering strength roughly double that of Grade 2, at the cost of reduced ductility and lower toughness. Its higher oxygen content, which underpins this strength, also increases susceptibility to stress corrosion cracking compared to lower CP grades, so it is best suited to applications where forming demands are modest and mechanical load-bearing matters most. Its self-healing titanium oxide passive film provides reliable protection against seawater, chlorides, nitric and chromic acids, and a broad range of industrial chemical environments. Non-magnetic, biocompatible, and weldable by TIG and MIG with inert gas shielding, without preheat or post-weld heat treatment. Typical applications include structural sheet components in chemical processing, oil and gas plant, aerospace assemblies, and automotive fabrications, as well as load-bearing medical device substrates. In research, it provides a traceable, specification-controlled high-strength CP titanium substrate for mechanical testing, corrosion characterisation, and surface treatment studies.
Starting at $266.00 each
No Minimum order Free technical support Free delivery available

Batch Testing & Verification

Goodfellow supplies commercially pure titanium foil with a material certificate. Where your application requires batch-specific measured data for a qualification file, incoming inspection, or failure investigation, our group laboratory Suisse Technology Partners (STP) holds ISO/IEC 17025 accreditation and can test the foil received and report against your requirement.

Materials testing and verification
Test Details
Static and dynamic testing
  • Wire EDM specimen preparation in rolling and transverse directions
  • Tested to ASTM E8/E8M
  • Foil-gauge specimen preparation
  • 3- and 4-point bend testing to ISO 7438
  • Application-specific dynamic testing (LCF, HCF) available on request for fatigue-critical programmes
AerospaceQualificationBatch QC
Grade chemistry (Grades 1–4)
  • Spark OES for alloying and trace elements
  • Combustion analysis for C and S (LECO CS-744; ASTM E1941)
  • Inert gas fusion for O and N (LECO ONH836; ASTM E1409) and H (ASTM E1447)
  • Reported against ASTM B265 grade limits
Batch QCMedicalAerospace
High-purity verification (3N–5N)
  • ICP-OES and ICP-MS
  • Sub-ppm detection limits for total metallic impurities
  • Suitable for qualification and release dossiers
ResearchGovernment & labsQualification
Microstructure & failure analysis
  • Metallography for grain structure, phase distribution and inclusions
  • SEM up to 100,000× with EDX/EDS for surface and elemental analysis
  • Stereomicroscopy for macroscopic examination
  • Fractography for failure origin and mechanism
Failure investigationAerospaceResearch
Hardness testing
  • Vickers microhardness across multiple points on the foil section
  • Brinell hardness for sheet and plate forms
Batch QCQualification
Specification development
  • Candidate material tested against application-specific criteria
  • STP advises on production-achievable limits
  • Goodfellow supplies to the agreed specification
AerospaceMedicalGovernment & labs
To add testing to an order or discuss a specification, please submit a quote request or contact us.

Key Features

Grade 4 Titanium possesses a combination of material characteristics that make it particularly well suited for aerospace, biomedical, chemical processing, electronics, and energy applications:

Excellent Corrosion Resistance

Grade 4 Titanium naturally forms a stable oxide layer (TiO₂) that protects it from corrosion in aggressive environments, including seawater, chlorides, and strong acids. This makes it valuable in marine, chemical, and biomedical systems.

Highest Strength Among Commercially Pure Titanium Grades

Grade 4 Titanium offers the highest yield strength of the commercially pure titanium grades, with typical values of 480–550 MPa. This makes it the preferred choice where maximum strength is required without the addition of alloying elements, such as in structural aerospace components, high-pressure chemical plant, and demanding medical device applications.

High Melting Point (1,660 °C)

Grade 4 Titanium's high melting point ensures structural stability under extreme heat, supporting its use in high-temperature tooling, aerospace shielding, and furnace components.

Biocompatibility

Grade 4 Titanium is bioinert and non-toxic, making it ideal for long-term contact with biological tissues. Its higher strength relative to lower grades makes it particularly suited to load-bearing medical implants, dental components, and surgical instruments where mechanical performance and biocompatibility must be combined.

Weldability & Fabricability

Grade 4 Titanium is weldable by TIG, MIG, and electron beam methods with inert gas shielding. While less ductile than Grades 1 and 2, it can be formed and fabricated into precision components with appropriate tooling, supporting its use in complex assemblies across aerospace and chemical processing industries.

Surface Engineering & Oxide Layer Control

Grade 4 Titanium's surface can be engineered through anodisation or oxidation to tailor its optical, electronic, or catalytic properties — useful in sensors, coatings, and energy devices.

Industrial Applications

Grade 1 Titanium is used across high-technology sectors for its corrosion resistance, strength-to-weight ratio, biocompatibility, and thermal stability:

✦ Aerospace & Propulsion Systems
Grade 1 Titanium is used in thermal shielding, engine insulation, and structural components where high strength, low weight, and heat resistance are essential. Its oxidation resistance supports long-term performance in high-altitude and space environments.
✦ Medical & Biomedical Devices
Biocompatible and non-toxic, Grade 1 Titanium is used in implantable devices, surgical instruments, and biosensors. Its corrosion resistance and compatibility with human tissue make it ideal for long-term applications inside the body.
✦ Chemical Processing & Marine Engineering
Grade 1 Titanium lines tanks, heat exchangers, and piping systems exposed to aggressive chemicals and seawater. Its resistance to chlorides and acids ensures durability in harsh industrial and offshore environments.
✦ Electronics & Semiconductor Fabrication
Used as a diffusion barrier, electrode substrate, and thin-film base layer, Grade 1 Titanium supports high-precision manufacturing in capacitors, sensors, and microelectronic devices.
✦ Energy Storage & Conversion Systems
Grade 1 Titanium is employed in battery current collectors and hydrogen storage systems due to its corrosion resistance, formability, and surface engineering potential.
✦ Optical & Surface Coating Technologies
Grade 1 Titanium's surface can be anodized or oxidized to produce interference colours or functional coatings, making it useful in optical filters, sensors, and decorative or functional surface treatments.

Synonyms

Grade 4 Ti Foil Grade 4 Titanium Sheet Grade 4 Titanium Strip

Material Properties

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°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
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Available Configurations

Properties common to all products in this list

Commodity: Metals Material: Titanium Form: Foil Composition: Ti Grade: Grade 4 CAS Number: 7440-32-6 Purity: 98.5% (1N85)

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Tolerances

Foil
Thickness <0.01mm ±25%
Thickness 0.01mm - 0.05mm ±15%
Thickness >0.05mm ±10%
Linear dimension <100mm ±1mm
Linear dimension >=100mm +2 / -1%