Ti‑6Al‑2Nb‑1Ta‑0.8Mo (commercial designations: Ti‑6211 or Ti‑621/0.8, UNS R56210) is a near‑alpha titanium alloy specifically developed for high‑pressure deep‑sea applications. Originally designed by the U.S. Navy in the 1950s–1960s for deep‑submergence pressure hulls, this alloy remains a critical material for manned submersibles, subsea production systems, and advanced naval structures due to its exceptional resistance to stress corrosion cracking (SCC) in seawater, superior fracture toughness, and excellent weldability in thick sections.

As a professional titanium alloy supplier, ZYTC ALLOY offers a stable supply of Ti‑6211 in all product forms, compliant with ASTM/AMS and classification society standards. We also provide matching welding consumables and process technical support to help global marine engineering customers achieve lightweight, high‑reliability equipment upgrades.

Chemical Composition (Typical Values, wt%)

Mechanical Properties (Annealed Condition, Typical Values)

Physical Properties

Property	Value
Density (g/cm³)	4.48
Melting Range (°C)	1660–1700
Thermal Conductivity (W/m·K) @ 20°C	~6.8
Coefficient of Thermal Expansion (×10⁻⁶/°C) @ 20‑100°C	9.2
Elastic Modulus (GPa) @ 20°C	115
Magnetic Properties	Non‑magnetic (μ ≈ 1.0003)

 

 

Applicable Standards and Certifications

Ti‑6211 supplied by ZYTC ALLOY fully complies with the following international standards and classification society rules:

• AMS 4904 – Titanium Alloy Plate, Sheet, and Strip

• MIL‑T‑9047 – Titanium and Titanium Alloy Plate, Sheet, and Strip (Military)

• ASTM B265 (Sheet/Strip/Plate), ASTM B348 (Bars/Billets), ASTM B381 (Forgings)

• NACE MR0175 / ISO 15156 – Marine and Oilfield Equipment (H₂S‑resistant environments)

• ABS (American Bureau of Shipping) – Rules for Marine Vessels and Submersibles

• NAVSEA (Naval Sea Systems Command) – Submarine Pressure Hull Specifications

All products can be supplied with EN 10204 Type 3.1/3.2 material certificates, and third‑party witnessed testing is available upon request.

Available Product Forms and Size Ranges

ZYTC ALLOY can provide Ti‑6211 in the following forms, customised to customer drawings:

We also offer value‑added machining services: 5‑axis CNC, wire EDM, TIG/laser/electron beam welding, hot forming, and hot isostatic pressing (HIP) – all under one roof.

 

Typical Application Areas

• Manned / Unmanned Submersibles: Pressure hulls (spherical and cylindrical) for operating depths > 4500 m

• Naval Vessels: Sonar domes, waterjet propulsion shafts, rudder and steering systems

• Offshore Oil & Gas: Subsea tree housings, manifold connectors, riser systems

• Ocean Observation: Underwater junction boxes, sensor pressure housings, ROV/AUV frames

• Marine Renewable Energy: Tidal turbine casings, subsea generator enclosures

Why Choose ZYTC ALLOY for Ti‑6211?

1. Reliable Raw Material Sources

We maintain long‑term strategic partnerships with leading domestic titanium melting mills, ensuring uniform composition, absence of segregation, and sufficient billet inventory to meet urgent order requirements.

2. Full‑Process Quality Control

From melting, forging, and rolling to heat treatment, every step is subject to rigorous in‑process inspection. Our in‑house testing equipment includes optical emission spectrometers, ultrasonic flaw detectors, universal testing machines, impact testers, and metallurgical microscopes, guaranteeing both internal and surface quality.

3. Flexible Customisation

We offer non‑standard dimensions, special tolerances, custom‑shaped forgings, and welded assemblies. We can also recommend optimum heat treatment cycles (e.g., duplex annealing, beta annealing) based on your specific service conditions to optimise overall performance.

4. Complete Welding and Forming Technical Support

In addition to base materials, we supply matching Ti‑6211 welding wire and thick‑plate welding procedure guidance. Our proprietary cold‑bending technology can significantly reduce the number of pipe welds, effectively lowering deep‑water fatigue risks.

5. Global Delivery and Customs Assistance

With an experienced foreign trade team, we provide moisture‑proof and impact‑resistant wooden case packaging, multimodal transport, and real‑time shipment tracking for customers in North America, Europe, Southeast Asia, and beyond. We also assist with export licenses and destination‑port tariff estimation to simplify procurement.

6. Comprehensive After‑Sales Service

We offer technical consultation during material use, on‑site failure analysis support, and rapid response to quality concerns, ensuring smooth progress of your projects.

Packaging and Transportation

• Standard Packaging:

  • Plates: plastic film + kraft paper + wooden pallets or crates

  • Bars/Forgings: steel strapping + wooden frame protection

  • Welding wire: vacuum‑sealed with desiccant

• Shipping Methods: Sea freight (break‑bulk or container), air freight, or land transport – optimised based on client lead‑time and cost preferences.

• Accompanying Documentation: Material certificates, dimensional inspection records, heat‑treatment curves, and non‑destructive test reports (optional) are provided with each shipment.

Alternative Material Selection Reference

If your project has different priorities regarding strength, toughness, or cost, the following alternatives may be considered:

For a more detailed Ti‑6211 Material Selection and Welding Application Manual, a specific quotation, or a technical solution, please contact the sales engineers at ZYTC ALLOY. With our professional technical background and reliable supply capacity, we are committed to providing dependable titanium alloy solutions for your deep‑sea equipment needs.

This product detail document is intended for engineers, procurement professionals, and project managers in marine engineering, shipbuilding, and deep‑sea exploration.

📧 daisy@zytcsteel.com
📲 WhatsApp: +86 17335753350