Ti-3Al-2.5V (Grade 9) bar and wire give buyers the best strength-to-weight balance of the common titanium grades, plus cold formability that Grade 5 lacks — which is why they are the default choice for springs, fasteners, welded structures, and machined components. This guide covers the typical specs, how Grade 9 bar compares to Grade 5, and what to verify before you order from a China supplier.
What Is Ti-3Al-2.5V (Grade 9) Bar & Wire?
Grade 9 — UNS R56320 — is a near-alpha titanium alloy with about 3% aluminium and 2.5% vanadium. In bar and wire form it sits between commercially pure (CP) Grade 2 and high-strength Grade 5 (Ti-6Al-4V): roughly 20–50% stronger than Grade 2, yet far easier to cold draw, form, and weld than Grade 5. That balance makes it the practical workhorse for drawn wire, springs, and lightly stressed structural bar.
Why Buyers Choose Grade 9 Bar & Wire
- Strength-to-weight. At a density of 4.48 g/cm³ (about 60% of steel’s weight), Grade 9 delivers 600+ MPa class strength, so wire springs and bar components stay light.
- Cold formability. Unlike Grade 5, Grade 9 wire draws and springs well, and bar bends and shapes without the cracking risk that limits the high-strength alloy.
- Corrosion resistance. A stable oxide film means no rust and no protective coating needed, even in marine and chemical atmospheres.
- Weldability. Grade 9 TIG- and resistance-welds cleanly, so it suits welded frames, cages, and assemblies.
- Cost position. It costs less to process than Grade 5 because forming and welding are simpler, while beating Grade 2 on performance.
Typical Specifications for Ti-3Al-2.5V Bar & Wire
The values below are typical reference ranges for annealed Grade 9 bar and wire. Always confirm against the ordered specification and the supplied mill test report.
| Property / Item | Typical Value | Note |
|---|---|---|
| UNS / Grade | R56320 / Grade 9 | Ti-3Al-2,5V |
| Density | 4.48 g/cm³ | ~60% of steel’s weight |
| Tensile strength (min) | 620 MPa (90 ksi) | Reference, annealed |
| Yield strength (min) | 483 MPa (70 ksi) | Reference, annealed |
| Elongation (min) | ≥ 15% | Good ductility |
| Common standards | ASTM B348, ASTM B863 | Bar/billet and wire specs |
| Typical sizes (bar) | Round Ø 6–200 mm; square/hex per drawing | Ground or pickled surface |
| Typical sizes (wire) | Ø 0.5–6 mm | Bright-drawn, spooled |
| Surface / test | Pickled, ground, or centerless-ground; PMI + MTC | EN 10204 3.1 on request |
Grade 9 Bar vs Grade 5 Bar: What to Know
| Factor | Grade 9 (Ti-3Al-2.5V) | Grade 5 (Ti-6Al-4V) |
|---|---|---|
| Strength (typical) | Medium–high | Highest |
| Cold formability | Very good | Difficult |
| Weldability | Gut | Good, but more process care |
| Best fit | Wire, springs, formed bar, welded parts | High-load structural parts |
In short: choose Klasse 9 when you need light weight, easy forming, and welding; choose Grade 5 when peak strength justifies the extra processing cost.
What a Buyer Should Verify Before Ordering
Bar and wire live or die on consistency. Before you commit, check: an EN 10204 3.1 mill test report with chemistry and mechanicals, PMI / positive material identification, straightness and diameter tolerance along the length, and for wire, consistent temper and spool condition. See our titanium bar & rod overview for the forms and standards we handle.
Why Source Through a China Titanium Partner
As a trading company, our job is to de-risk your buy: we consolidate qualified mills, enforce incoming QC (PMI, UT/PT where applicable, EN 10204 3.1), keep MOQs flexible for prototype-to-production runs, and give you transparent lead times instead of vague promises. That matters most on bar and wire, where lot-to-lot consistency decides whether your downstream forming succeeds.
Frequently Asked Questions
Is Grade 9 bar stronger than Grade 2?
Yes. Grade 9 (Ti-3Al-2.5V) is roughly 20–50% stronger than Grade 2 (commercially pure titanium) while keeping similar density and corrosion resistance — a meaningful step up for structural bar and wire.
Can Grade 9 wire be used for springs?
Yes. Grade 9’s good cold formability and high strength make it a common choice for titanium springs and spring wire, where it resists fatigue better than many alternatives.
What standards cover Grade 9 bar and wire?
Typical references are ASTM B348 for bar and billet and ASTM B863 for wire. Always confirm the exact grade and condition on your purchase order and mill test report.
How does Grade 9 bar compare to Grade 5 for machining?
Both machine well with proper tooling, but Grade 9 forms and welds far more easily, so it is usually the better pick when the part is formed or welded rather than heavily loaded.
Angebot einholen
Need Ti-3Al-2.5V (Grade 9) bar or wire with full traceability? Request a quote from FDtitanium with your diameters, lengths, tempers, and spec — we’ll return a graded offer with MTC and an inspection plan.
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