TITANIUM GRADE 2 FASTENERS — DATASHEET, CHEMICAL COMPOSITION, MECHANICAL PROPERTIES & SUPPLY

Ananka Fasteners is a premier manufacturer and global exporter of Titanium Grade 2 Fasteners (UNS R50400 / W.Nr. 3.7034), the preeminent foundation of the commercially pure (CP) unalloyed titanium family. Occupying a critical intersection between moderate tensile strength, exceptional ductility, and virtually unparalleled corrosion resistance, Grade 2 is universally recognized as the industrial workhorse. It delivers a remarkable 42% mass reduction compared to standard austenitic stainless steels while maintaining superior durability.

Unlike its highly alloyed counterparts (such as Ti-6Al-4V Grade 5), Grade 2 titanium cannot be strengthened through heat treatment precipitations. Instead, its mechanical properties are meticulously governed by solid-solution strengthening, achieved through the precise control of interstitial impurity elements—primarily oxygen and iron. This single-phase, hexagonal close-packed (HCP) matrix ensures exceptional resilience and shock absorption capabilities.

Every Titanium Grade 2 fastener manufactured by Ananka is produced using precision CNC machining or controlled hot forging, strictly safeguarding against alpha case contamination. We mandate rigorous thread rolling whenever feasible to induce beneficial compressive residual stresses that elevate fatigue life. Backed by EN 10204 Type 3.1 Material Test Certificates and full compliance with ASTM F468, our fasteners are the material of choice for offshore oil and gas, marine desalination, chemical processing, and high-purity medical sectors worldwide.

Every lot of Titanium Grade 2 fasteners shipped by Ananka is accompanied by a highly detailed EN 10204 Type 3.1 Manufacturer Test Certificate (MTC), ensuring absolute metallurgical pedigree traceable back to the originating mill.

Each MTC documents:

• Actual chemical analysis confirming strict control of Oxygen, Iron, and Hydrogen limits
• Complete mechanical tests for yield, ultimate tensile strength, and elongation
• Dimensional inspection data per applicable DIN/ISO/ASME standards
• Certification against alpha case contamination during hot forging processes

The operational performance, fatigue life, and corrosion resistance of Titanium Grade 2 fasteners are fundamentally determined by their rigid chemical composition. The mechanical baseline is established through solid-solution strengthening utilizing precisely controlled interstitial impurities.

Within the commercially pure spectrum, Grade 2 provides a moderate strength profile, sitting decisively above the highly formable Grade 1, but below the stronger Grade 3. Its low modulus of elasticity (roughly half that of structural steel) imparts exceptional flexibility and resilience, resisting vibrational loosening.

Elevated Temperature Derating Dynamics

Titanium Grade 2 maintains structural integrity over long thermal exposures, but its strength drops linearly as temperatures rise. Continuous service temperatures are generally capped at 426°C (800°F), with intermittent low-stress service spikes up to 538°C (1000°F).

The single most defining attribute of Titanium Grade 2 is its near-absolute invulnerability to a massive spectrum of corrosive media, driven by the instantaneous formation of a stable, self-healing titanium dioxide (TiO₂) passive oxide film.

• Marine & Desalination: Effectively immune to general corrosion, pitting, and crevice corrosion in seawater at temperatures up to 315°C (600°F).
• Chemical Processing: Exceptional performance in wet chlorine gas, chlorites, hypochlorites, nitric acid, and chromic acid.
• Aerospace & Motorsport: Utilized extensively for its 42% mass reduction compared to steel, optimizing dynamic performance.
• Biomedical Implants: Manufactured to stringent ASTM F67 specifications, Grade 2 offers unparalleled biocompatibility.
• CRITICAL WARNING: Grade 2 fasteners must absolutely NEVER be specified for dry chlorine gas or red fuming nitric acid systems.

• Titanium Grade 2 Bolts: Hex head, socket head, and structural configurations.
• Titanium Grade 2 Nuts: Standard hex and heavy hex nuts for massive proof loads.
• Titanium Grade 2 Washers: Flat and spring washers for critical load distribution.
• Titanium Grade 2 Studs: Precision-machined studs for pressure vessels.

A paramount engineering obstacle during the installation of Titanium Grade 2 fasteners is extreme vulnerability to thread galling (cold welding). Bare titanium threads must never be installed dry.

• Lubrication is Mandatory: Engineers must mandate advanced boundary lubrication, such as Molybdenum Disulfide or PTFE coatings.
• Anodizing Treatments: Type II or Type IV anodizing thickens the natural oxide layer, drastically enhancing wear resistance.
• Torque K-Factor: For properly lubricated assemblies, the K-factor drops to ≈ 0.20 or lower. Torque values must be strictly monitored.
• Thermal Joint Compliance: When titanium bolts clamp aluminum flanges, careful engineering is required to prevent thread stripping due to CTE mismatches.

• Alpha Case Eradication: We aggressively chemically mill or precision grind all hot-forged parts post-process to completely eradicate brittle surface layers.
• Thread Rolling Superiority: We roll-form threads to preserve continuous grain flow and induce compressive residual stresses, elevating fatigue life by over 30%.
• 100% Traceability: All fasteners are permanently stamped with manufacturer symbols and property markings per ASTM F468.
• Surface Treatments: Advanced Type II/IV anodizing and proprietary dry film lubricants (WS₂) are available in-house.