Titanium Grade 5
Bolt & Nut
Fasteners Manufacturer
What Is Titanium Grade 5 Bolt & Nut (Ti-6Al-4V)
Titanium Grade 5, known by its alloy designation Ti-6Al-4V, is an alpha-beta titanium alloy — unlike commercially pure Grade 2, it contains deliberate alloying additions of aluminium and vanadium that fundamentally change its mechanical behaviour. It’s estimated to account for roughly half of all titanium used worldwide, making it the default choice whenever “titanium” is specified without further qualification in aerospace or high-performance engineering.
Chemical composition (wt%): Aluminium 5.5–6.75, Vanadium 3.5–4.5, Iron ≤0.4 (max), Oxygen ≤0.2 (max), Carbon ≤0.08 (max), Nitrogen ≤0.05 (max), Hydrogen ≤0.015 (max), balance Titanium. The aluminium stabilises the alpha phase and the vanadium stabilises the beta phase, giving the alloy its characteristic two-phase microstructure.
Mechanical properties: minimum tensile strength of 895 MPa (130 ksi) and minimum yield strength of 828 MPa (120 ksi) in the annealed condition — figures that can be pushed still higher through solution treatment and ageing (STA), since unlike Grade 2, Grade 5 is genuinely heat-treatable. Density sits at 4.43 g/cm³, marginally lower than Grade 2 despite the added strength.
Where Titanium Grade 5 Genuinely Earns Its Cost
Roughly 2.5x the Strength of Grade 2
Minimum tensile strength of 895 MPa versus 345 MPa for commercially pure titanium, at effectively the same density — the reason Grade 5 is specified wherever structural load-bearing capacity actually matters.
Genuinely Heat-Treatable
Solution treatment and ageing (STA) can raise Grade 5’s strength further still — a processing route simply not available with commercially pure Grade 2, which cannot be strengthened this way.
The Standard Aerospace Alloy
Accounting for an estimated half of all titanium used globally, Grade 5 is the alloy engineers reach for by default in airframe, engine, and structural fastening applications.
Load-Bearing Implant Grade
ASTM F136 defines an extra-low-interstitial (ELI) version of Grade 5 for surgical implants, used where an implant must bear real mechanical load beyond what CP titanium is suited for.
Titanium Grade 5 vs Titanium Grade 2
Most buyers evaluating titanium fasteners aren’t actually choosing between titanium and steel — they’re deciding between Grade 5 and Grade 2. The distinction is straightforward once you separate what each grade is actually built for: Grade 2 is commercially pure titanium, optimised for corrosion resistance, formability, and biocompatibility at moderate strength. Grade 5 is an alloyed, heat-treatable material built for strength first, with corrosion resistance and biocompatibility as a secondary (though still strong) benefit. The comparison below is the one we walk through with buyers before quoting.
| Property | Titanium Grade 5 (Ti-6Al-4V) | Titanium Grade 2 (CP Ti) |
|---|---|---|
| Density | 4.43 g/cm³ | 4.51 g/cm³ |
| Tensile Strength (min) | 895 MPa | 345 MPa |
| Yield Strength (min) | 828 MPa | 275 MPa |
| Elongation (min) | 10% | 20% |
| Heat Treatable | Yes — solution treat & age (STA) | No |
| Weldability | Good, more process-sensitive | Excellent, straightforward |
| Biocompatible Implant Standard | ASTM F136 (ELI grade) | ASTM F67 / ISO 5832-2 |
| Typical Use | Aerospace structural, high-stress fastening | Corrosion-focused, formable applications |
| Relative Material Cost | Higher | Lower |
Titanium Grade 5 Product Range
Hex Bolts
Full metric & imperial range, ASTM B348 Grade 5
Hex Nuts
Standard, thin, and self-locking configurations
Stud Bolts
Full-thread and tap-end, aerospace & structural grades
Washers
Flat, spring, and sealing washer profiles
Socket Head Cap Screws
Hex socket drive, aerospace & precision assembly grade
Titanium Grade 5 Technical Specifications
Alloying Elements (wt%)
- Aluminium (Al) 5.5–6.75
- Vanadium (V) 3.5–4.5
- Iron (Fe) 0.4 max
- Oxygen (O) 0.2 max
- Carbon (C) 0.08 max
- Titanium (Ti) Balance
Strength & Ductility (annealed, min)
- Tensile Strength 895 MPa
- Yield Strength (0.2%) 828 MPa
- Elongation 10%
- Density 4.43 g/cm³
- Melting Point ~1660°C
- Heat Treatment STA available
Available Dimensions
- Metric Diameter M3 – M36
- Imperial Diameter 1/8″ – 1.5″
- Bolt Length Up to 300mm
- Stud Length Custom to drawing
- Finish As-machined / Anodized
- Testing MTC / NABL on request
Application Areas
Wherever strength-to-weight is the deciding factor, not just corrosion resistance alone.
Aerospace Structural & Engine
high-stress structural joints
Load-Bearing Implants
ASTM F136 ELI grade
Motorsport & Performance
weight-critical high-load fastening
Marine Racing Hardware
rigging and structural fastening
Oil & Gas High-Strength Fastening
subsea and downhole hardware
Defense & Military
and strength-critical platforms
Sporting Goods & Bicycles
fastening hardware
General High-Strength Industrial
strength-critical applications
Standard Export Documentation
Prepared as standard practice for every Titanium Grade 5 shipment.
Mill Test Certificate (MTC)
Heat number, chemical composition, and mechanical property verification for every lot.
Certificate of Conformance
Confirms the shipment matches the purchase order specification and grade in full.
Certificate of Origin (COO)
Confirms India as country of manufacture for destination customs purposes.
Commercial Invoice & Packing List
Itemized value, Incoterm, and detailed carton/weight breakdown for customs clearance.
NABL Accredited Test Reports
Independent mechanical and chemical testing available on request for critical applications.
Bill of Lading
Ocean or air freight shipping document confirming carrier, mode, and consignee details.
Internationally Recognised Standards Coverage
Related Fastener Grades & Materials
Titanium Grade 2 Fasteners
Commercially pure titanium for corrosion-focused, formable, and biocompatible applications.
View Grade 2 →Stainless Steel 316 Fasteners
The economical corrosion-resistant alternative where titanium properties aren’t required.
View SS 316 →Super Duplex Fasteners
High strength and severe chloride resistance for demanding process environments.
View Super Duplex →Hastelloy B-3 Stud Bolts
Nickel-molybdenum alloy fastening for reducing acid and severe corrosion service.
View Hastelloy B-3 →Sourcing Titanium
Grade 5 Fasteners?
Size · quantity · standard · heat-treatment condition. Akbar Fasteners Pvt. Ltd. responds within 24 hours with pricing and mill test documentation.
Sales: +91 724 0000 733 · Support: +91 800 9315 333 · sales@akbarfasteners.in