Aerospace Ti6Al4V Gr23 Titanium Fasteners

Description Of Aerospace Ti6Al4V Gr23 Titanium Fasteners

Aerospace Ti6Al4V Gr23 Titanium Fasteners are precision fasteners manufactured from Ti-6Al-4V ELI (Extra Low Interstitial) titanium alloy, also known as Grade 23 or UNS R56407. This material is specified by ASTM F136 and AMS 4930 for surgical implants and aerospace applications. It offers higher ductility, fracture toughness, and biocompatibility compared to standard Ti-6Al-4V (Grade 5), making it the preferred choice for critical aerospace structures and medical implants.

The manufacturing process begins with high-quality Ti-6Al-4V ELI bar stock or forgings, which are CNC machined to precise dimensions and thread profiles. Fasteners are available in a wide range of types, including bolts, nuts, screws, studs, washers, and custom designs. Tight tolerances down to ±0.01mm and surface roughness Ra ≤0.8μm are achievable. Thread forms include metric, UNC, UNF, BSP, and custom threads. Head styles include hex, socket head, button head, flat head, and custom designs.

Ti-6Al-4V ELI fasteners offer a unique combination of properties: density of approximately 4.43 g/cm³ (about 60% lighter than steel), high tensile strength ≥860 MPa, excellent corrosion resistance in seawater, chlorides, acids, and body fluids, and biocompatibility for medical applications. They are non-magnetic and can be anodized or coated for color coding and additional protection.

Features Of Aerospace Ti6Al4V Gr23 Titanium Fasteners

• Aerospace-Grade Material: Ti-6Al-4V ELI (Grade 23, UNS R56407) with extra-low interstitial elements for superior toughness and biocompatibility.

• High Strength: Tensile strength ≥860 MPa, yield strength ≥795 MPa, elongation ≥10%.

• Excellent Corrosion Resistance: Resists seawater, chlorides, acids, alkalis, and body fluids.

• Biocompatible and Nickel-Free: Ideal for medical implants and surgical instruments.

• Lightweight: Density 4.43 g/cm³, about 60% lighter than steel.

• Non-Magnetic: Suitable for MRI-compatible devices and electronic equipment.

• Precision CNC Machining: Tight tolerances down to ±0.01mm, surface roughness Ra ≤0.8μm.

• Wide Range of Fastener Types: Bolts, nuts, screws, studs, washers, and custom shapes.

• Thread Forms: Metric, UNC, UNF, BSP, BSPT, and custom threads.

• Surface Finishes: Machined, polished, anodized, PVD coated.

• Quality Certifications: ISO 9001:2015, AS9100D; compliant with ASTM F136, AMS 4930, ISO 5832-3.

Usage Precautions and Limitations Of Aerospace Ti6Al4V Gr23 Titanium Fasteners

• Proper Installation: Use calibrated torque wrenches and follow recommended tightening specifications. Avoid over-tightening, which can cause thread stripping or fastener fracture.

• Galling Prevention: Titanium has a tendency to gall (cold weld) during threading and assembly. Use anti-seize lubricants or coatings, and avoid high-speed assembly.

• Galvanic Corrosion: Titanium is a noble metal and can cause galvanic corrosion when in contact with less noble metals (such as aluminum, zinc, or carbon steel) in the presence of an electrolyte. Provide insulation or isolation at dissimilar metal interfaces.

• Hydrogen Embrittlement: Avoid exposure to hydrogen-containing environments at high temperatures, as titanium can absorb hydrogen and become brittle.

• Temperature Limitations: Operating temperature should not exceed 400°C for continuous use (600°C short-term). At higher temperatures, titanium may react with oxygen, nitrogen, and hydrogen.

• Cleaning: Clean with a soft cloth or mild solvent. Avoid abrasive cleaners that could damage the surface or introduce contamination.

Specifications Of Aerospace Ti6Al4V Gr23 Titanium Fasteners