Precision-turned from certified vacuum-melted Grade 5 (Ti-6Al-4V) and high-purity Grade 2 billet. Designed to eliminate unsprung weight, withstand aggressive corrosive chemistries, and deliver extreme shear strength.
Why leading Tier-1 aerospace contractors, racing performance tuners, medical device manufacturers, and high-end EDC designers consolidate their custom titanium turned components procurement with Velnora Titanium Industry in Baoji, China.
Titanium turning represents one of the most demanding sub-disciplines in advanced subtractive manufacturing. Characterized by low thermal conductivity ($k \approx 6.7 \text{ W/m}\cdot\text{K}$ for Ti-6Al-4V versus $50 \text{ W/m}\cdot\text{K}$ for typical carbon steel), high chemical reactivity at elevated cutting temperatures, and a low modulus of elasticity ($E \approx 114 \text{ GPa}$), machining Grade 5 and Grade 2 titanium demands hyper-rigid workholding, specialized tool geometries, and proprietary chip-control kinematics. Uncontrolled heat accumulation at the tool-workpiece interface induces rapid flank wear, notch wear, and thermal deflection, risking catastrophic dimensional drift on high-tolerance cylindrical components.
Founded in 2013 and situated within Baoji, Shaanxi Province—globally acknowledged as "China’s Titanium Valley"—Velnora Titanium Industry Co., Ltd. sits at the strategic epicenter of the international titanium supply chain. This geographic synergy grants direct access to primary vacuum-arc remelted (VAR) sponge titanium ingots, certified cold-drawn precision rod stock, and world-class metallurgical research institutes. By integrating Citizen and Star multi-axis Swiss-type screw lathes, dual-spindle live-tooled mill-turn centers, and ultra-high-pressure coolant delivery systems (up to 140 bar), Velnora delivers aerospace-grade dimensional repeatability, ultra-concentric threads, and superior Ra 0.4 μm surface topographies without secondary manual finishing.
Full heat-level traceability for every batch of Gr5 (Ti-6Al-4V / TC4), Gr2 CP Titanium, Gr9, and surgical Gr23 ELI. Backed by EN 10204 3.1 Mill Test Certificates and chemical composition verification.
Equipped with 7-axis to 9-axis Swiss-lathe platforms capable of sub-miniature turning from Ø0.8mm to Ø38mm. Guide-bushing micro-turning ensures zero deflection on high aspect-ratio dowels and shafts.
Unlike cut threads that sever metal grain lines, Velnora utilizes thread rolling dies for external fastener geometries. Continuous metal grain flow boosts cyclical tensile fatigue life by over 35%.
Material performance benchmarking for procurement officers, mechanical engineers, and stress-joint designers evaluating replacement of 304/316L stainless steel, 7075 aluminum, and structural alloy steels.
| Material Grade | Yield Strength ($R_{p0.2}$ MPa) | Tensile Strength ($R_m$ MPa) | Density ($\text{g/cm}^3$) | Modulus ($E$ GPa) | Corrosion Mechanism | Typical Machined Application |
|---|---|---|---|---|---|---|
| Gr5 Ti-6Al-4V (Annealed) | 828 – 910 | 895 – 1000 | 4.43 | 114 | Passive $\text{TiO}_2$ Barrier (Impervious) | Brake Caliper Screws, Rotor Bolts, Axles, Racing |
| Gr2 Pure Titanium | 275 – 350 | 345 – 480 | 4.51 | 105 | Supreme Chemical/Chlorine Resistance | Marine Plugs, Chemical Fittings, Anodizing Racks |
| Gr23 Ti-6Al-4V ELI | 790 – 860 | 860 – 965 | 4.43 | 110 | Biocompatible / ASTM F136 Compliant | Surgical Screws, Dental Implants, Micro-Pins |
| 304 / 316L Stainless Steel | 205 – 290 | 515 – 620 | 7.98 | 193 | Pitting & Crevice Risk in Halide Salts | Standard Metric Screws, Commercial Hardware |
| Aircraft 7075-T6 Al | 480 – 505 | 540 – 570 | 2.81 | 71 | Galvanic Pitting / Thermal Softening >120°C | Low-Stress Brackets, Fairing Washers, Caps |
| AISI 4140 Class 10.9 Steel | 940 – 1040 | 1040 – 1200 | 7.85 | 210 | Rapid Rust (Demands Zinc / Cadmium Plate) | Heavy Engine Head Studs, Suspension Fasteners |
Crucial Design Note: While Grade 5 titanium offers an ultimate tensile strength exceeding 950 MPa—directly on par with Property Class 8.8 and approaching Class 10.9 structural steels—its modulus of elasticity is approximately half that of steel ($114 \text{ GPa}$ vs $210 \text{ GPa}$). Consequently, when substituting steel fasteners in shear-critical dynamic environments (such as motorcycle brake discs or automotive hub assemblies), design engineers must calculate pre-load elongation and apply lubricated friction-coefficient compensations. Utilizing rolled threads and precision-machined under-head radius transitions eliminates stress-riser concentration factors, preventing cyclical micro-fretting.
Strategic procurement dynamics reshaping the global supply network for precision-turned titanium hardware, driven by aerospace light-weighting, micro-mobility, and automated high-mix low-volume supply chains.
With virgin titanium sponge prices fluctuating, high-volume procurement programs are turning toward hybrid manufacturing: sintering or additive manufacturing (EBM/SLM) of near-net blanks, completed by high-speed Swiss-lathe turning to achieve ±0.005mm critical seating surfaces while reducing scrap waste ratios by up to 55%.
Tier-1 procurement teams no longer accept "black-box" manufacturing. The new industry benchmark requires digital live-audit protocols, wherein factories provide serialized optical inspection records, continuous tool-wear compensation logs, and high-definition video verification of raw bar turning prior to customs clearance.
B2B buyers are pivoting from piece-part price evaluation to Lifecycle TCO models. In marine, offshore chemical, and electric vehicle applications, titanium fasteners eliminate recurrent maintenance cycles, galvanic replacement labour, and anti-corrosion plating costs, yielding positive ROI inside 24 operating months.
How Velnora overcomes titanium's inherent work-hardening tendencies, high spring-back properties, and extreme friction coefficients using proprietary toolpaths and specialized metallurgy.
Conventional flood cooling creates an insulating vapor blanket at high feed rates. Velnora deploys targeted 140-bar through-tool micro-jets directly into the shear zone. This shatters stringy continuous chips into C-shaped segments, stabilizing insert life and securing Ra ≤ 0.4 μm cylinder surfaces.
To prevent severe tool-clogging and surface gouging during deep internal boring and micro-turning of small fasteners (M2–M4), our synchronized Swiss axes oscillate tools along the feed axis. This induces periodic air-cutting pauses that mechanically fracture swarf without compromising cycle time.
Titanium has high galling susceptibility under bare metal-to-metal torque. Velnora integrates in-house AMS 2488 Type II anodic barrier oxidation, multi-spectrum decorative anodization, and specialized PVD DLC (Diamond-Like Carbon) coatings that drop friction coefficients below 0.12.
Quality management verified by multi-stage metrology, optical profile checking, eddy-current crack detection, and complete pre-shipment mechanical validation.
Every raw bar delivered to our workshop undergoes X-ray fluorescence (XRF) and optical emission spectrometry (OES) to inspect interstitial gas concentrations ($O \le 0.20\%$, $N \le 0.05\%$, $H \le 0.0125\%$). Excess interstitial pickup embrittles titanium, creating microscopic crack initiation sites during high-load mechanical tension.
Parts run through automated Keyence optical sorting systems checking 100% of thread pitch, major/minor diameters, underhead fillet radii, and drive socket concentricities. Critical mating interfaces are inspected on Zeiss Coordinate Measuring Machines (CMM) in our climate-regulated laboratory ($20\text{\textcelsius} \pm 0.5\text{\textcelsius}$).
Authoritative technical resolutions to the most prevalent questions asked by mechanical engineers, supply chain directors, and purchasing agents before submitting RFQs.
Upload your 2D/3D part drawings (.STEP, .IGES, or .PDF) or request standard DIN/ISO/ANSI fastener quotes. Our technical engineering team in Baoji reviews tolerances, toolpaths, and DFM feasibility, providing pricing and lead times within 4 business hours.