Grade 10.9 Metric Equivalent
Grade 10.9 M24/M22 Titanium Alloy Oil Cap Screw
High-tensile Ti-6Al-4V construction for power chassis, sealing housings, and micro-vehicle thermal sumps.
Engineered Titanium Scooter & Vehicle Hardware
Every component is CNC precision-machined from certified Gr5 (Ti-6Al-4V) aerospace bar stock, delivering 45% weight elimination compared to 10.9 steel while completely neutralizing road salt corrosion.
±0.01mm
CNC Machining Accuracy
>895MPa
Grade 5 Tensile Yield
44%
Mass Reduction vs Steel
100%
Batch Traceability (MTC)
Engineering White Paper: Titanium Metallurgy in Urban Micromobility Fleet Architecture
As the primary industrial nexus of the eastern Ruhr area (Ruhrgebiet), Dortmund has evolved into a strategic logistical and testing perimeter for micro-mobility innovation. Between the central pedestrian zones surrounding the Westenhellweg, the academic transit vectors around the TU Dortmund University, and the industrial topography of Phoenix West, e-scooter fleets and custom personal mobility systems encounter immense mechanical cyclic loading. Sourcing components that withstand dynamic shear, prevent cold-weather brittle failure, and eliminate electrolytic oxidation is paramount for procurement engineers.
Standard Grade 8.8 and 10.9 steel fasteners, while possessing standard tensile properties, impose heavy parasitic weight penalties and suffer catastrophic corrosion when exposed to municipal de-icing chemicals (calcium chloride and sodium chloride) utilized throughout North Rhine-Westphalia winters. Conversely, aluminum 6061 and 7075 components demonstrate poor shear endurance, fatigue failure at notch roots, and vulnerability to stress corrosion cracking under Dortmund's urban transit vibration. Jiaxing Wexra Titanium Products Co., Ltd. bridges this engineering gap through titanium CNC precision hardware.
Material Property Matrix: Grade 5 Titanium vs. Structural Alloys
For municipal fleet operators and scooter hardware engineers in Germany, selecting hardware requires strict adherence to physical strength parameters. Our titanium fastener production strictly utilizes mill-certified Grade 5 Ti-6Al-4V (Material No. 3.7165) and Grade 2 (Material No. 3.7035):
| Alloy Specification | Density (g/cm³) | Tensile Strength (MPa) | Yield Strength (MPa) | Fatigue Limit (10⁷ Cycles) | Chemical Resistance (Salts / Cl) |
|---|---|---|---|---|---|
| Wexra Titanium Gr5 (Ti-6Al-4V) | 4.43 | ≥ 895 MPa | ≥ 828 MPa | 510 MPa | Chemically Inert (TiO₂ Passivated) |
| Alloy Steel Grade 10.9 | 7.85 | 1040 MPa | 940 MPa | 420 MPa | Rapid Rusting / Requires Zinc Coatings |
| Austenitic Stainless (A2-70 / 304) | 7.93 | 700 MPa | 450 MPa | 240 MPa | Pitting Susceptible in Saline Slush |
| Aircraft Aluminum 7075-T6 | 2.81 | 572 MPa | 503 MPa | 159 MPa | High Risk of Galvanic Exfoliation |
Vibration Dampening & Anti-Loosening Mechanics
Electric scooters operating in Dortmund frequently negotiate historic cobblestone pavements, recessed tramway rails along the DSW21 network, and curb transitions. These conditions introduce continuous high-frequency vibrations that induce rapid bolt preload loss. Grade 5 titanium possesses a modulus of elasticity (~114 GPa) roughly half that of structural carbon steel (~210 GPa). This metallurgical elasticity allows Wexra titanium bolts to act as miniature mechanical springs under torque tension, absorbing chassis flexure and dampening vibration harmonics that otherwise result in catastrophic steering column detachments.
Operating Scenarios
Application Scenarios Across Dortmund Urban Topography
Engineered to meet the precise environmental stresses of municipal German infrastructure and high-wear private e-mobility.
DSW21 Tram Crossing Durability
Titanium axle bolts and suspension arms absorb continuous shock loading when traversing Dortmund tramway track beds without suffering shear embrittlement or thread notch failures.
Ruhr Winter Salt Immunity
Municipal de-icing brine applied across Dortmund roads induces severe electrolytic pitting in steel. Titanium's self-healing oxide layer completely isolates the metal against road slurry corrosion.
High-Torque Disc Brake Mounting
Repeated down-hill braking from Dortmund's elevated southern districts generates localized hub temperatures exceeding 350°C. Wexra Gr5 Torx disc bolts retain yield stiffness without thermal relaxation.
Market Dynamics
Ruhr-Area Micromobility & E-Scooter Fleet Trends
Analyzing regulatory compliance, sustainability frameworks, and life-cycle economics across North Rhine-Westphalia.
StVZO & eKFV Structural Stringency
Germany's Elektrokleinstfahrzeuge-Verordnung (eKFV) mandates strict functional reliability. Fleet operations servicing Dortmund require hardware that mitigates structural recall liabilities.
TCO Fleet Economics
While initial acquisition cost is higher than mild steel, titanium eliminates thread seizure, stripping, and recurring replacements, lowering total cost of ownership across multi-year municipal contracts.
EPR Packaging & RoHS Mandates
All parts shipped to North Rhine-Westphalia comply strictly with the German Packaging Act (LUCID EPR registered) and EU RoHS/REACH chemical directives, ensuring friction-free clearance through customs.
Enterprise Strengths
Jiaxing Wexra Titanium Products Co., Ltd.
Operating from Jiaxing Headquarters Business Garden in Zhejiang, China, Wexra specializes purely in titanium metallurgy and precision CNC manufacturing. We provide full-tier supply integration to industrial and e-mobility brands in Germany, the United States, the UK, and Canada.
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ISO 9001:2015 Quality Management System: Complete process traceability from raw titanium sponge ingot melting to completed, threaded fasteners.
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Thread Rolling Technology: Our threads are cold-rolled rather than cut, aligning the titanium grain boundary flow and increasing fatigue resistance by over 30%.
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German Compliance Ready: Registered for German EPR (Packaging Register LUCID), fully CE marked, with REACH and RoHS certification.
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Custom OEM/ODM Drawing Support: Fast-turn prototyping within 7 days from CAD, STEP, or physical samples, followed by volume production.
Technical Q&A
Frequently Asked Questions for Dortmund Buyers
Clarifying engineering tolerances, German import regulations, delivery timelines, and metallurgical practices.
What quality certification and MTC documents accompany shipments to Dortmund? +
Every production run is supplied with a comprehensive EN 10204 3.1 Mill Test Certificate (MTC) verifying raw material chemical composition (Titanium balance, Al, V, Fe, C, N, H, O content) and physical mechanical tests (tensile, yield, elongation). In addition, we supply complete coordinate measuring machine (CMM) dimensional verification sheets and certificate of conformity with EU RoHS and REACH directives.
How does Wexra comply with German EPR (VerpackG) regulations? +
Jiaxing Wexra Titanium Products Co., Ltd. is registered with the German Stiftung Zentrale Stelle Verpackungsregister (ZSVR) via the LUCID portal. When shipping commercial orders to Dortmund or across North Rhine-Westphalia, all transport cartons, internal wrapping, and labeling comply fully with dual-system recycling quotas, ensuring direct, penalty-free logistics for our German trade partners.
What thread standard do you provide for European micro-mobility assemblies? +
We manufacture ISO Metric coarse and fine threads according to DIN 13 / ISO 965-2 (Tolerance class 6g for external threads and 6H for internal nuts). All threads feature rolled roots to eliminate notch stress concentrations. For specific custom scooter hubs or imported electric motors, imperial UNC/UNF threads are also precision rolled on demand.
How do you prevent galling (Kaltverschweißung) when pairing titanium bolts with aluminum? +
Titanium fasteners mounted into aluminum scooter stems or deck housings can be susceptible to galling if torqued dry without lubrication. We provide proprietary PVD treatments, electrolytic anodizing (which builds a durable TiO₂ ceramic barrier without increasing dimensional thread pitch), and recommend specific anti-seize paste (copper or nickel-based) accompanied by adjusted assembly torque specs tailored to our titanium components.
What are standard production lead times and air-freight corridors into North Rhine-Westphalia? +
Stock fastener lots are dispatched within 48 hours. Custom CNC parts requiring turning, milling, and custom PVD coloring require 12 to 18 business days. For express delivery to Dortmund, air-freight via Frankfurt Airport (FRA) or Düsseldorf Airport (DUS) averages 4 to 6 business days for customs clearance and direct delivery. Ocean containerized cargo arrives through the Port of Hamburg or Rotterdam with scheduled rail freight into the Dortmund inland container terminal.
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