Gr9 (UNS R56320) Supplier | Bar, Tube, Plate - Hangbo Alloy

Shanghai Hangbo Alloy Group Co., Ltd. is an ISO 9001:2015 certified manufacturer and global supplier of premium Titanium Grade 9 (Ti-3Al-2.5V, UNS R56320) round bars, seamless and welded tubes, plates, sheets, wires and forgings. The near-alpha lean alloy bridges the gap between commercially pure grades and Ti-6Al-4V — roughly 40% stronger than Grade 3 while remaining cold-formable, readily weldable and highly fatigue-resistant. Grade 9 is the global standard for aerospace hydraulic tubing, medical instrumentation and offshore riser systems.

Standards & Specifications

• ASTM B265 — Strip, Sheet and Plate (also ASME SB-265)
• ASTM B348 — Bars and Billets (also ASME SB-348)
• ASTM B861 (seamless tube) / ASTM B862 (welded tube)
• AMS 4934 / MIL-T-9046 (aerospace tubing and bar)
• UNS R56320 / EN 10204 3.1 / 3.2 mill certificates with every shipment

Precise ASTM Chemical Composition (%)

Physical & Mechanical Properties (Annealed, Minimum)

Depth Characteristics

1. Cold-Formable Powerhouse: Unlike Grade 5, Gr9 can be cold-bent, flared and swaged in the annealed condition — the reason it dominates aerospace hydraulic and pneumatic tubing.
2. High Fatigue Resistance: Superior HCF performance to CP titanium makes it ideal for pressurized tube systems, springs and fasteners subjected to cyclic loading.
3. Excellent Weldability: Lean alloy content minimizes HAZ hardening; TIG, plasma and laser welds meet AMS 4934 requirements with simple annealing.
4. Strength-to-Weight Advantage: 90 ksi minimum tensile at 4.48 g/cm³ gives aerospace-grade specific strength for weight-critical structures.
5. Corrosion Performance: Retains the seawater-grade corrosion resistance of titanium with improved resistance to stress-corrosion in hot chloride media.
6. Medical Compatibility: Increasingly specified for dental implants, orthopedic screws and surgical instruments where strength and biocompatibility are required together.

Manufacturing Process — Sponge Selection, VAR / EB Melting

Gr9 begins with premium low-interstitial Kroll-process titanium sponge blended with 60/40 aluminum-vanadium master alloy under strict lot control. The compacted electrodes are melted 1–3 times by Vacuum Arc Remelting (VAR) for aerospace rotor-grade soundness, or through Electron Beam Cold Hearth Melting (EBCHM) for fracture-critical tube stock — eliminating high-density inclusions that could fail hydraulic systems. Ingots are forged and rolled in the alpha+beta field, then annealed at 650–760°C. Hydraulic tubing receives pilger or rotary-rolling reduction, full-length ultrasonic inspection and flare/hydraulic proof testing per AMS 4934.

Testing & Inspection — PMI / UT

• PMI (Positive Material Identification): 100% XRF / arc-OES verification of Al and V content on every bar, tube and plate delivered.
• UT (Ultrasonic Testing): Full-length ultrasonic examination of bar/billet per ASTM E2375 / E213 and plate per ASTM E114; tube per ASTM E213 with optional eddy current (ASTM E426).
• Tube Qualification: Flare, flattening, hydrostatic and burst tests on hydraulic tubing per AMS 4934 / MIL-T-9046.
• Mechanical & Dimensional: Tensile per ASTM E8, hardness, microstructure verification and full dimensional checks to mill tolerance.
• EN 10204 3.1 / 3.2 certificates and third-party inspection (SGS, BV, TÜV) available.

Application Scenarios — Aerospace / Medical / Marine

• Aerospace: Hydraulic, fuel and pneumatic tubing; wing and fuselage skins; fasteners; ducting and engine bleed-air lines on commercial and military aircraft.
• Medical: Dental implants, orthopedic screws and plates, surgical instruments and endoscopic shafts requiring MRI-safe, biocompatible strength.
• Marine & Offshore: Subsea control-line tubing, drill risers, mooring components and seawater hydraulic systems.
• Sporting Goods & Automotive: Bicycle frames, motorcycle exhausts, suspension springs and high-performance fasteners.
• Oil & Gas: Instrumentation and chemical-injection tubing in sour and saline service where CP titanium lacks strength.

7+ Professional FAQs

1. What is the UNS number of Titanium Grade 9?
Titanium Grade 9 (Ti-3Al-2.5V) is UNS R56320, specified under ASTM B265 (sheet/plate), B348 (bar/billet), B861 (seamless tube) and B862 (welded tube).

2. How does Gr9 compare with Grade 5 (Ti-6Al-4V)?
Gr9 is about 30% lower in strength than Grade 5 but is far more cold-formable, easier to weld, and tougher in thin sections — the standard trade for tubing and sheet applications.

3. Can Gr9 tubing be bent and flared?
Yes — in the annealed condition Gr9 tube can be cold-bent, flared and swaged to aerospace standards without cracking, which is its primary advantage over Grade 5.

4. Is Gr9 weldable?
Excellent weldability by TIG/GTAW, plasma or laser under inert shielding; simple post-weld anneal at 650–760°C restores full properties.

5. What is the maximum service temperature?
Gr9 is rated for continuous service to ~315°C (600°F); above this, oxidation and creep begin to limit application.

6. Is Gr9 used in medical implants?
Yes — its combination of strength, biocompatibility and MRI compatibility makes it popular for dental implants and orthopedic hardware.

7. Which melting routes are used for Gr9?
Double or triple VAR for aerospace-grade material, with EBCHM refining for fracture-critical tube stock; each heat is chemistrized before release.

8. What forms does Hangbo supply in Gr9?
Hydraulic-grade seamless tube, welded tube, round bar, plate, sheet, wire and forgings, all with PMI-verified chemistry and full documentation.

Supply List

• Seamless Tube (Hydraulic Grade): OD 3mm – 76mm, AMS 4934
• Round Bar: Φ6mm – Φ300mm, peeled/ground, annealed
• Plate / Sheet: Thickness 0.5mm – 50mm, ASTM B265
• Welded Tube / Pipe: OD 19mm – 610mm, ASTM B862
• Wire / Forgings: Fastener wire, flanges and custom components

Contact Hangbo Alloy for Certified Titanium Gr9

Need certified Titanium Gr9 (UNS R56320) hydraulic tube, bar or plate for aerospace or medical programs? Contact Shanghai Hangbo Alloy Group for instant quotations, stock availability and mill certificates — quick response within 10 minutes.