Titanium 6-6-2
Titanium 6-6-2, AMS 4918, is a high-performance titanium alloy, specifically Ti-6Al-6V-2Sn, known for its exceptional strength, toughness, and resistance to elevated temperatures. With a composition that includes aluminum, vanadium, and tin, AMS 4918 offers a tensile strength of 145-155 ksi and a yield strength of 135-170 ksi, making it ideal for demanding applications and high-performance structural uses. Its balanced combination of elements ensures reliability and durability in critical environments.
United Performance Metals stocks Ti-6-6-2 plate sizes 0.250" - 4.000". Some of the common applications for this product include aircraft structures, engine components, landing gear parts, heat exchangers, and pressure valves.
- Inventory & Specs
- Chemical Composition
- Physical Properties
- Mechanical Properties
- Datasheet
- Additional Info
- FAQs
Inventory Size Ranges for Titanium 6-6-2
| Type | Thickness | AMS Standards | UNS | Get a Quote |
|---|---|---|---|---|
| Plate | 0.250" - 4.000" | AMS 4918 | UNS R56620 | Get a Quote |
Characteristics of Titanium 6-6-2
This grade of titanium alloy can be heated treated to higher strengths and heavier section sizes compared to that of Ti-6AL-4V. Ti-6-6-2 possesses excellent strength, corrosion resistance, and a medium level of fabricability.
Working with Titanium 6-6-2
Titanium 6-6-2 is readily finish-forged from 1650°F (899°C) with a minimum finishing temperature of 1,400°F (760°C). Minimum reductions of about 35% in the alpha-beta range are recommended to obtain specification properties.
This product can be difficult to cold form due to its high strength and large amount of springback. Annealed material may be hot-formed up to 1,500°F (816°C). Hot sizing or creep forming is generally performed at 1,000 - 1,300°F (538 - 704°C), however, any heating above 1,100°F (593°C) results in surface contamination and the contaminated layer must subsequently be removed by machining or proper pickling.
Titanium 6-6-2-can be successfully welded using the inert gas shielded, fusion-welding process, but the heat affected zone will have considerably lower ductility and toughness compared to the parent metal. Some improvement in ductility can be obtained by using commercially pure titanium filler wire to dilute the beta-stabilizing elements, and by using a post-weld treatment.
Other industry standards we comply with:
- MMS 1203
- DMS 1879
Common Trade Names
- Ti-6-6-2
- Ti-6AL-6V-2Sn
- ATI 6-6-2™ (Allegheny Technologies)
Industry Applications for Titanium 6-6-2
- Aircraft structural components
- Engine components
- Landing gear parts
- Heat exchangers
- Pressure valves
Chemical Composition
| Element | Min | Max | |
|---|---|---|---|
| Al | Aluminum | 5.0 | 6.0 |
| C | Carbon | - | 0.05 |
| V | Vanadium | 5.0 | 6.0 |
| N | Nitrogen | - | 0.04 |
| Sn | Tin | 1.5 | 2.5 |
| H | Hydrogen | - | 0.015 |
| Fe | Iron | 0.35 | 1.0 |
| Y | Yttrium | - | 0.005 |
| Cu | Copper | 0.35 | 1.0 |
| O | Oxygen | - | 0.20 |
| Ti | Titanium | - | Balance |
| - | Other | 0.40 | - |
Physical Properties
| Property | Value |
|---|---|
| Density | 4.54 g/cm3 (0.14 lb/in3) |
| Melting Point | ~1,650°C (3,000°F) |
| Modulus of Elasticity | 114 GPa (16.5 x 106 psi) |
| Thermal Conductivity | ~6.6 W/m·K |
Mechanical Properties
| Property | Value |
|---|---|
| Tensile Strength | 145-155 ksi |
| Yield Strength | 135-170 ksi |
| Elongation Percent | 6-10% |
Datasheet
Additional Info
A Brief History of Titanium 6‑6‑2
Titanium 6‑6‑2—also known as Ti‑6Al‑6V‑2Sn, UNS R54620, or Grade 6 titanium—is a high‑strength alpha‑beta titanium alloy engineered for demanding aerospace and industrial environments. Developed as aircraft systems began operating at higher stresses and temperatures, Titanium 6‑6‑2 was designed to outperform commercially pure titanium and early titanium alloys through enhanced strength retention, fatigue resistance, and thermal stability.
With a carefully controlled alloying balance of aluminum, vanadium, and tin, Titanium 6‑6‑2 delivers exceptional mechanical performance while maintaining titanium’s hallmark advantages: low density, excellent corrosion resistance, and high strength‑to‑weight ratio.
How Titanium 6‑6‑2 Was Developed
Titanium 6‑6‑2 emerged alongside the rapid expansion of jet aviation and supersonic aircraft programs during the mid‑20th century. Engineers required a titanium alloy capable of sustaining higher operating temperatures and mechanical loads than Ti‑6Al‑4V without sacrificing fracture toughness or long‑term fatigue life.
By alloying approximately 6% aluminum, 6% vanadium, and 2% tin, metallurgists produced a stable alpha‑beta alloy with improved creep resistance, tensile strength, and fatigue stability—particularly at elevated temperatures approaching 600°F (315°C). Tin was added to increase strength and temperature capability, while vanadium enhanced beta‑phase stability and workability, resulting in a balanced, high‑performance plate material suitable for aircraft structures and rotating components.
Early Applications of Titanium 6‑6‑2
As aerospace platforms demanded lighter, stronger materials, Titanium 6‑6‑2 quickly gained acceptance for mission‑critical components where both weight reduction and structural integrity were essential. Early applications focused on aircraft structural members, engine components, and fasteners exposed to cyclic loading and elevated temperatures.
The alloy’s excellent resistance to stress‑corrosion cracking and fatigue made it well suited for airframe structures, landing gear components, and engine‑adjacent hardware—areas where failure is not an option. Compared to earlier titanium grades, Titanium 6‑6‑2 provided increased design margins without the mass penalty of steel or nickel‑based alloys.
How Titanium 6‑6‑2 Is Used Today
Today, Titanium 6‑6‑2 plate remains a trusted material across aerospace and advanced manufacturing sectors where high mechanical strength, thermal stability, and corrosion resistance are required. Its ability to maintain performance under cyclic stress and moderate heat exposure makes it ideal for applications such as:
- Aerospace: airframe structures, engine mounts, landing gear components, structural fittings
- Defense: aircraft skins, armored structural elements, high‑strength assemblies
- Industrial engineering: high‑load structural plates, tooling plates, corrosion‑resistant structural components
- Energy & marine: components requiring high strength‑to‑weight ratios and resistance to saltwater and aggressive environments
Titanium 6‑6‑2 plate offers an outstanding balance of tensile strength, fracture toughness, and fatigue resistance while remaining significantly lighter than steel or nickel‑based alternatives—making it a preferred solution when performance, efficiency, and reliability are critical.
Your Trusted Supplier for Titanium 6‑6‑2
United Performance Metals is a global specialty metals solutions provider offering Titanium 6‑6‑2 plate in a wide range of gauges and dimensions. With advanced processing capabilities and deep experience supporting aerospace, defense, and high‑performance industrial markets, UPM delivers precision‑cut titanium plate tailored to your exact specifications.
Backed by reliable supply chain solutions and expert material support, our team helps ensure Titanium 6‑6‑2 performs exactly as required in your most demanding applications.
Contact United Performance Metals today to learn how Titanium 6‑6‑2 plate can strengthen your next high‑performance design.
Product FAQs
Ti 6-6-2 is best for demanding aerospace, space, and defense applications where exceptional strength and heat resistance outweigh weldability and ductility concerns. This alloy is frequently used in jet engines, airframes, and reactor components.