Ti-6AL-4V (Ti., Gr. 5) titanium alloy

Ti-6Al-4V , also known as titanium alloy 6AL-4V or Grade 5 titanium alloy , is an extremely common and versatile titanium alloy with excellent strength-to-weight ratio, corrosion resistance, and good heat resistance. It is widely used in aerospace, medical, marine, and industrial fields. Many mobile phones and watches currently use titanium alloys of this specification. Lightweight and high strength are the hallmarks of titanium alloys.

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The main chemical components of Ti-6Al-4V are as follows:

Titanium (Ti) : Balance

Aluminum (Al) : 5.5% – 6.75%

Vanadium (V) : 3.5% – 4.5%

Iron (Fe) : ≤ 0.40%

Oxygen (O) : ≤ 0.20%

Carbon (C) : ≤ 0.08%

Nitrogen (N) : ≤ 0.05%

Hydrogen (H) : ≤ 0.015%

High strength-to-weight ratio : Ti-6Al-4V is known for its excellent strength and extremely light weight, with a strength-to-weight ratio far exceeding that of steel, making it particularly attractive in the aerospace and automotive industries.

Excellent corrosion resistance : Titanium has good resistance to a variety of corrosive environments (such as salt water, chemicals and acids), making it particularly suitable for marine and chemical industries.

High heat resistance : Ti-6Al-4V can maintain its high strength and structural integrity at temperatures up to 400°C , making it suitable for applications requiring high-temperature stability.

Biocompatibility : Ti-6Al-4V is biocompatible, making it an ideal material for medical devices and implants, such as orthopedic implants (hip, knee, etc.) and dental implants.

Ti-6Al-4V is an α+β type titanium alloy with a two-phase structure:

α phase : Rich in aluminum, providing excellent oxidation and corrosion resistance, and enhancing the stability of materials at high temperatures.

β phase : Contains vanadium, which helps improve the ductility and forgeability of the material while maintaining its strength.

This two-phase structure gives Ti-6Al-4V excellent performance in both high strength and good machinability.

The mechanical properties of Ti-6Al-4V vary depending on different heat treatment and manufacturing processes. The following are typical performance data:

Tensile strength : 895 MPa to 1100 MPa

Yield strength : 828 MPa to 910 MPa

Elongation : 10-15%

Hardness : Typically around Rockwell C 30-40

These data show that Ti-6Al-4V maintains a lightweight design while possessing very high mechanical strength and excellent toughness.

Ti-6Al-4V exhibits excellent performance in a variety of corrosive environments:

Marine environment : It has extremely high corrosion resistance in salt water, so it is widely used in ships, submarines and marine structures.

Chemical industry : It can resist the corrosion of a variety of acidic and alkaline chemicals, making it suitable for use in chemical processing equipment and pipelines.

Aerospace : Its corrosion resistance helps protect aircraft and spacecraft from environmental damage in high humidity and high pressure environments.

Although Ti-6Al-4V has good strength, it is relatively difficult to process due to the special properties of titanium.

Machining : Due to its high strength and low thermal conductivity, machining Ti-6Al-4V requires the use of specialized tools, coolant, and slower cutting speeds to reduce tool wear and prevent excessive heat buildup.

Welding : Ti-6Al-4V has good welding performance, especially suitable for processes such as TIG (tungsten inert gas welding) and electron beam welding . However, the entry of oxygen and nitrogen must be strictly controlled during the welding process, otherwise the performance of the weld will be degraded.

Forging and stamping : It has good forgeability and can be processed with large deformation through hot forging, making it suitable for manufacturing high-strength structural parts.

The properties of Ti-6Al-4V can be adjusted through different heat treatments:

Annealing : The material is heated to 700°C to 800°C and then slowly cooled to improve toughness and ductility while reducing internal stress.

Quenching and tempering : Quenching and tempering can further improve the strength of materials, but usually at the cost of reduced ductility.

Hot isostatic pressing (HIP) treatment : HIP can eliminate internal pores in materials, improving their density and mechanical properties.

Aerospace : Used to manufacture structural components, engine parts, and landing gear for aircraft and spacecraft, due to their high strength and lightweight characteristics, as well as their ability to maintain stable performance in high-temperature environments.

Medical devices : Due to its good biocompatibility and corrosion resistance, Ti-6Al-4V is used to manufacture various implants, such as orthopedic implants (e.g., artificial hip joints, knee joints) and dental implants.

Marine engineering : Used in shipbuilding and submarine structures to resist saltwater corrosion and maintain strength and stability in deep-sea environments.

Chemical industry : Used to manufacture corrosion-resistant reactors, heat exchangers, valves, and other equipment suitable for handling highly corrosive chemicals.

Automotive Industry : In high-end automobiles, Ti-6Al-4V is used to manufacture high-performance engine components, such as connecting rods and valves.

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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.

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