TC4 Titanium vs Grade 5 Titanium
Jan 15, 2026
Titanium alloys are widely used in fields such as aerospace and medical devices. Among the numerous titanium alloys, TC4 titanium alloy and Grade 5 titanium alloy are often mentioned. They are actually the same type of titanium alloy material.
TC4 Titanium and Grade 5 Titanium Are the Same Titanium Alloy
TC4 titanium and Grade 5 titanium are essentially different naming conventions for the same titanium alloy, Ti-6AL-4V. TC4 is the designation for a titanium alloy under the Chinese National Standard (GB), while Grade 5 is the designation for the same titanium alloy under the American Society for Testing and Materials (ASTM). Both have essentially identical chemical compositions and properties, belonging to the titanium-aluminum-vanadium alloy category.
Chemical Composition:
Titanium (Ti): Balance
Aluminum (Al): Approximately 6.0%
Vanadium (V): Approximately 4.0%
Other Elements: Trace amounts of iron (Fe), oxygen (O), and other impurities
Due to the high consistency in chemical composition and structure, TC4 titanium can be directly used in engineering applications as ASTM Grade 5 titanium.
The grades Titanium Grade 1 to Grade 12 are based on the American ASTM standards, and their corresponding Chinese grades are as follows:
Titanium Alloy Grade Comparison Table
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TC4 Titanium Alloy: The High-Performance Material
Whether TC4 or Grade 5, their composition is Ti-6Al-4V, which is a high-performance material with high strength and excellent corrosion resistance. Ti-6Al-4V is also the most maturely applied titanium alloy material.
The main chemical components of TC4 titanium include Titanium (Ti), Aluminum (Al), Vanadium (V), and Iron (Fe). Among them, the titanium content is over 90%, aluminum content is about 6%, vanadium content is 4%, and iron content is low, generally not exceeding 0.3%. This specific formulation gives TC4 titanium alloy excellent mechanical properties and corrosion resistance.
In terms of mechanical properties, Ti-6Al-4V titanium alloy performs exceptionally well. Its tensile strength can reach over 1000 MPa, with yield strength around 900 MPa, and it possesses high hardness and elastic modulus.
TC4 titanium also exhibits excellent corrosion resistance. Its corrosion resistance is mainly reflected in its ability to withstand corrosive media such as oxidation, nitration, and chlorination. In corrosive environments like seawater or chemical industries, TC4 titanium alloy can maintain surface smoothness and mechanical properties for a long time, ensuring a longer service life.
FAQ
| What is GR5 titanium alloy? GR5 titanium alloy, with the standard designation Ti-6Al-4V, is an alpha-beta titanium alloy primarily composed of titanium (Ti) with approximately 6% aluminum (Al) and 4% vanadium (V). |
| Why is GR5 titanium alloy so widely used? GR5 titanium alloy is widely used because it offers an optimal balance of high strength, good ductility, excellent corrosion resistance, and favorable weldability, making it versatile for demanding applications. |
| What is the chemical composition of GR5 titanium? The nominal chemical composition of GR5 titanium is Titanium (Ti) balance, Aluminum (Al) 5.5-6.75%, Vanadium (V) 3.5-4.5%, with strict limits on impurities like Iron (Fe), Oxygen (O), Carbon (C), and Nitrogen (N). |
| What are the key mechanical properties of GR5 titanium? Typical minimum mechanical properties for annealed GR5 titanium are: Tensile Strength ≥ 895 MPa, Yield Strength ≥ 825 MPa, and Elongation ≥ 10%. Its strength can be increased through heat treatment. |
| What is the density of GR5 titanium? The density of GR5 titanium is approximately 4.43 g/cm³, which is about 60% of the density of steel, contributing to its high strength-to-weight ratio. |
| Can GR5 titanium be heat treated? Yes, GR5 titanium can be strengthened through solution treatment and aging (STA) processes, which enhance its mechanical properties compared to the annealed condition. |
| Is GR5 titanium corrosion resistant? Yes, GR5 titanium exhibits excellent corrosion resistance in many environments, including seawater, chloride solutions, and various chemical media, due to a stable, protective oxide film. |
| Can GR5 titanium be welded? Yes, GR5 titanium has good weldability using processes like Gas Tungsten Arc Welding (GTAW/TIG) and Electron Beam Welding (EBW), provided that strict shielding from atmospheric contamination is maintained. |
| 9. How does the strength of GR5 compare to commercially pure (CP) titanium grades? GR5 titanium has significantly higher strength than CP titanium grades (such as GR2 or GR4). GR5 is a medium-strength alloy, whereas CP grades are lower in strength but often more formable. |
| What are the main industries that use GR5 titanium? The primary industries using GR5 titanium are aerospace (for airframe and engine components), medical (for orthopedic and dental implants), marine, chemical processing, and high-performance automotive. |
| Is GR5 titanium biocompatible? Yes, GR5 titanium (Ti-6Al-4V) is considered biocompatible and is a standard material for permanent surgical implants like joint replacements and bone plates, though there is ongoing research into vanadium-free alloys for certain long-term implants. |
| 12. What are the machining considerations for GR5 titanium? Machining GR5 titanium requires sharp tools, lower cutting speeds, high feed rates, ample coolant, and a rigid setup to manage its low thermal conductivity and tendency to work-harden. |
Our product range
| Product Category | Product Form | Common Grades / Alloys | Applicable Standards (Examples) |
|---|---|---|---|
| Titanium Tubes | Seamless & Welded Tubes | • CP (Commercially Pure): Gr1, Gr2, Gr3 • Alloys: Ti-6Al-4V (Gr5), Ti-3Al-2.5V (Gr9) |
ASTM B337, B338 ASME SB338 DIN 17860, 17861 GB/T 3624, 3625 |
| Titanium Bars | Round, Hexagon, Square Bars | • CP: Gr1, Gr2, Gr4 • Alloys: Ti-6Al-4V (Gr5), Ti-6Al-4V ELI |
ASTM B348 ASME SB348 AMS 4928 GB/T 2965 |
| Titanium Plates/Sheets | Plates, Sheets, Strips | • CP: Gr1, Gr2, Gr3, Gr4 • Alloys: Ti-6Al-4V (Gr5), Ti-6Al-4V ELI, Ti-15V-3Cr-3Sn-3Al (Gr21) |
ASTM B265 ASME SB265 AMS 4911 GB/T 3621 |
| Titanium Wires | Coils, Straight Lengths | • CP: Gr1, Gr2, Gr4 • Alloys: Ti-6Al-4V (Gr5) • Specialty: Ti-Ni Shape Memory Alloy (on request) |
ASTM F67, B863 AMS 4954 GB/T 3623 |
| Titanium Foils | Thin Foils, Ultra-thin Strips | • CP: Gr1, Gr2 (most common) | ASTM B265 (for thinner gauges) Custom specifications |
Our factory
why choose our products
Our factory is a specialized and integrated manufacturer dedicated to titanium and titanium alloy products. Equipped with advanced precision forging, rolling, drawing, and heat treatment lines, we produce a complete range of forms including tubes, bars, plates/sheets, wires, and foils. We strictly adhere to international standards such as ASTM, ASME, and GB, utilizing grades from CP (Gr1, Gr2) to high-performance alloys like Ti-6Al-4V (Gr5). Our core strength lies in our stringent process control from raw material to finished product, supported by a fully-equipped in-house laboratory for metallurgical and mechanical testing. This integrated system ensures exceptional quality, consistency, and reliability for our customers in aerospace, medical, chemical processing, and other high-tech industries.
