Flagship 
ISO 4018 Gr5 Titanium Hex Bolt (Full Thread)
- GradeTi-6Al-4V (Grade 5)
- ThreadM6 – M24 Full Thread
- Tensile≥ 950 MPa
Baoji Titanium Valley · Since 2013
ISO 4018 Titanium Hex Bolts: Engineering Procurement Guide
The definitive B2B technical guide to DIN 558 / ISO 4018 full-thread titanium hexagon head bolts. High tensile strength, extreme chemical corrosion resistance, and 44% weight reduction.
10+ YearsDirect Mill Factory
100+ CNCPrecision Turning Centers
EN 10204 3.1Full Lot Traceability
Standardized Engineering
What Are ISO 4018 Titanium Hex Bolts? Dimensional & Mechanical Realities
In global industrial fastening, ISO 4018 specifies hexagon head bolts with threads up to the head (fully threaded) featuring coarse metric threads ranging from M5 up to M64. While traditional carbon steel ISO 4018 bolts are designated as Product Grade C (coarser dimensional tolerances), modern aerospace, chemical processing, and performance engineering industries demand CNC-machined titanium executions that unite the full-thread utility of ISO 4018 with tight aerospace-grade micro-tolerances.
Core Mechanical Value
Precision Full-Thread Fastening for Corrosive & High-Vibration Enclosures
Unlike ISO 4014 which leaves an unthreaded shank, or ISO 4017 which governs Product Grade A and B precision executions, ISO 4018 Titanium Hex Bolts allow complete engagement across shallow tapped blind holes, ultra-thin tapped plates, and adjustable clamping assemblies. Where standard austenitic stainless steel (such as 304 or 316) suffers from pitting corrosion and chloride stress crack failure at elevated temperatures, Grade 2 and Grade 5 (Ti-6Al-4V) titanium offer an impermeable rutile passive oxide layer.
Yevzo Titanium Metal Co., Ltd. specializes in multi-axis Swiss CNC turning and high-speed precision threading of ISO 4018 bolts. Our proprietary rolled-thread and precision-cut thread options ensure uninterrupted metal grain flow lines around the thread roots, significantly mitigating shear stress concentration and improving cyclic fatigue life under continuous dynamic loads.
- Full thread profile designed for tapped blind holes
- Density of 4.43 g/cm³ – 44% lighter than carbon & stainless steel
- Zero pitting or galvanic degradation in marine salt fog
- 100% non-magnetic permeability (µr < 1.00005)
2013Operational In Baoji
100+CNC Machine Units
1000+Enterprise Team
5.0Buyer Rating Score
Engineering Data & Verification
ISO 4018 Titanium Hex Bolts Technical Specification & Comparison
Accurate mechanical criteria dictate fastener selection. Review our ASTM B348 Grade 2 and Grade 5 (Ti-6Al-4V) baseline values evaluated against traditional high-tensile steels and stainless standards.
ISO 4018 Titanium Physical & Mechanical Comparison Matrix
| Mechanical Property | Gr2 CP Titanium | Gr5 (Ti-6Al-4V) | A4-80 Stainless | Steel Class 8.8 |
|---|---|---|---|---|
| Tensile Strength Rm (MPa) | ≥ 345 | ≥ 895 – 1050 | ≥ 800 | ≥ 800 |
| Yield Strength Rp0.2 (MPa) | ≥ 275 | ≥ 828 | ≥ 600 | ≥ 640 |
| Elongation at Break A5 (%) | ≥ 20 | ≥ 10 – 15 | ≥ 12 | ≥ 12 |
| Mass Density (g/cm³) | 4.51 | 4.43 | 7.95 | 7.85 |
| Modulus of Elasticity (GPa) | 105 | 114 | 193 | 205 |
| PREN Resistance (Corrosion) | Immune to Cl- | Immune to Cl- | 23 - 25 | < 10 (Rusts) |
| Operational Temperature Limit | Up to 350°C | Up to 450°C | Up to 400°C | Up to 300°C |
Mechanical testing performed in accordance with ISO 6892-1 / ASTM E8. Material certified to ASTM B348, AMS 4928, and ISO 4018 / DIN 558 thread geometry standards.
Full Thread Runout Control
Our ISO 4018 bolts maintain an optimized thread root radius according to ISO 965-1 6g fit. Under-head radius blending prevents notch stress fatigue failures commonly observed in low-tier cold-headed alternatives.
Strict Chemical Assay Inspection
Every batch undergoes quantitative glow discharge optical emission spectrometry to confirm Interstitial Elements: Fe ≤ 0.30%, C ≤ 0.08%, N ≤ 0.05%, H ≤ 0.015%, and O ≤ 0.20%.
Standard Equivalence
Full backward interchangeability with DIN 558 and ISO 4017 across matching pitch diameters, thread pitches, and across-flats wrench widths (ISO vs DIN head standards catered upon request).
Strategic Intelligence
Future Sourcing & Procurement Trends for Titanium Hex Bolts
Global original equipment manufacturers (OEMs) and supply chain executives face unprecedented structural disruptions in raw material availability, weight targets, and lifecycle decarbonization. Here is how ISO 4018 titanium fasteners are transforming procurement agendas through 2026–2030.
EV Lightweighting & Unsprung Mass
Automotive powertrain engineers are systematically substituting heavy steel hex bolts with Gr5 ISO 4018 fasteners across battery tray housings, suspension knuckles, and motor casings to maximize EV range and reduce curb weight without sacrificing structural rigidity.
Offshore Renewable Infrastructure
Green hydrogen electrolyzers, subsea interconnectors, and floating offshore wind systems are abandoning periodic fastener replacement schemes. ISO 4018 titanium bolts represent a fit-and-forget solution that eliminates million-dollar offshore bolt replacement maintenance operations.
Supply Chain Digital Traceability
Procurement platforms increasingly mandate verifiable digital material passports. Buyers demand end-to-end provenance starting from vacuum arc remelted (VAR) titanium sponge directly to the finished, laser-marked hex head bolt with instant access to EN 10204 3.1 mill data.
Direct-from-Source Baoji Consolidation
Procurement teams are cutting intermediary distributors to source directly from Baoji, China's "Titanium Valley". Sourcing directly from Yevzo Titanium Metal Co., Ltd. slashes tier markups by 25–40% while ensuring direct engineering oversight on custom threading tolerances.
Manufacturing Innovation
Technological Evolution: Next-Generation Titanium Fastener Production
Discover how modern manufacturing breakthroughs are elevating ISO 4018 titanium hex bolts beyond classical manufacturing limitations to satisfy aerospace and extreme-environment industrial thresholds.
Cold-Heading vs. CNC Turning
While mass consumer hardware utilizes cold heading, high-integrity ISO 4018 titanium bolts benefit from advanced CNC turning. This prevents internal micro-fissuring and yields exact thread form perpendicularity within 0.01mm.
Precision CNC EngineeringVacuum Arc Degassing
Hydrogen embrittlement is the silent assassin of titanium joints. Our vacuum annealing protocols remove trapped interstitial gases, maintaining hydrogen content strictly below 50 PPM for cryogenic and high-stress operations.
Thermal IntegrityMicro-Arc & PVD Nitriding
To overcome titanium's traditional susceptibility to galling and abrasive fretting, our specialized surface engineering department applies hard Titanium Nitride (TiN), DLC, or Type II electrolytic anodizing to lower friction.
Anti-Galling SurfacesAdditive-Subtractive Hybrid
Our R&D metallurgy facility pioneers integration with additively manufactured lightweight lattice structures, allowing custom hollowed hex heads with internal drainage ports for specialised motorsport installations.
Pioneering R&DRecommended ISO 4018 Titanium Hex Bolts & Assemblies
Explore our flagship configurations manufactured to ISO 4018 / DIN 558 dimensions. Stocked in Baoji for rapid global export or customized according to OEM engineering prints.
ISO 4018 Grade 2 Pure Titanium Hex Bolt
- MaterialCP-Ti Gr2 (ASTM B348)
- FeatureMaximum Acid / Cl- Resistance
- ApplicationDesalination / Petrochem
Surface Mod
TiN / DLC Coated ISO 4018 Hex Bolt
- SurfaceAnti-Galling DLC / PVD Gold
- Friction Coeff.μ ≤ 0.12 Dry
- Hardness≥ 2500 HV
ISO 4018 Bolt + DIN 6923 Titanium Nut System
- AssemblyBolt, Flat Washer & Locknut
- Tolerance6g / 6H Precise Fit
- AdvantageZero Galvanic Dissimilarity
Why Yevzo Titanium
Enterprise Manufacturing Strengths & Facility Infrastructure
Headquartered in Baoji's Titanium Valley since 2013, Yevzo Titanium Metal Co., Ltd. provides end-to-end manufacturing oversight that safeguards high-stress engineering assemblies across four continents.
1
Prepare Titanium Materials
Virgin titanium sponge melted via vacuum consumable arc furnaces into high-grade ASTM B348 billets with comprehensive heat lot documentation.
2
Three Axis Machining Group
Over 100 high-speed 3-axis CNC centers, Swiss-type automatic turning lathes, and multi-station high-speed threaders running continuous production.
3
Purge Group
Automated vacuum chemical degreasing, ultrasonic decontamination, and acid pickling to eliminate surface embedded iron contaminants.
4
R&D Metallurgy Group
In-house laboratory verifying microstructural alpha-beta grain morphology, tensile elongation, yield characteristics, and thread shear loading limits.
5
Package Group
Thread-shielding individually separated blister packages, desiccated moisture-barrier containers, and customized buyer barcoded packaging.
Direct Factory Accountability
Zero Intermediaries, Direct Engineering Collaboration
Operating as an integrated manufacturer and exporter, Yevzo Titanium Metal Co., Ltd. eliminates distribution markups, communication bottlenecks, and opaque subcontractor practices. Every technical specification is evaluated directly by our metallurgical engineering team prior to order acceptance.
North America (ASTM / ASME) Northern & Western Europe (DIN / ISO) Eastern Asia (JIS Compliant) Global Aviation & Industrial Sectors
Incoterms Handled: FOB, CFR, CIF, EXW, FCA, CPT, DDP (Door-to-Door Duty Paid), DDU, Express Air Freight.
Payment Flexibility: T/T, L/C at sight, D/P, PayPal, Western Union.
Primary Settlement Currencies: USD, EUR, GBP, JPY, AUD, CAD, CNY.
Yevzo Titanium Metal Co., Ltd. Baoji Facility
Frequently Asked Questions
ISO 4018 Titanium Hex Bolts: Engineering & Sourcing FAQ
Precise, actionable answers to technical, commercial, and metallurgical queries posed by engineers and global procurement officers.
What is the technical distinction between ISO 4018, ISO 4017, and ISO 4014?
All three standards govern metric hexagon head bolts. ISO 4014 defines partially threaded hex bolts with an unthreaded grip length (shank) intended for shear joints and thick clamping stacks. ISO 4017 defines fully threaded hexagon head screws manufactured to precision Product Grades A and B (tighter head and shank runout tolerances). ISO 4018 defines fully threaded hexagon head bolts categorized under Product Grade C (coarser commercial tolerances in classical steel). When engineered in titanium by Yevzo Titanium Metal Co., Ltd., ISO 4018 configurations provide full thread engagement suited for tapped blind housings, while meeting tight CNC turning tolerances for demanding mechanical duties.
When should an engineer specify Grade 2 titanium instead of Grade 5 (Ti-6Al-4V) for ISO 4018 bolts?
Grade 2 (Commercially Pure Titanium) is optimal when corrosion resistance in aggressive reducing acids, chlorites, nitric acid, and chlorine dioxide takes precedence over high tensile loading. Gr2 possesses a yield strength around 275 MPa and elongation up to 20%, which provides outstanding ductility and chemical resistance in pulp, paper, flue gas desulfurization, and chemical wash towers. Conversely, Grade 5 (Ti-6Al-4V) provides high yield strength (≥ 828 MPa) and high tensile strength (≥ 895–1050 MPa), making it mandatory for structural motorsport, aerospace brackets, marine subsea tie-downs, and EV powertrain mounts.
How can galling and thread seizing be prevented when installing titanium bolts?
Thread galling (cold welding) happens when the protective titanium oxide layer breaks under high friction and contact pressure. To prevent this, apply anti-seize paste containing molybdenum disulfide (MoS2), nickel, or copper. During automated installation, limit tool speed to 200–300 RPM to keep temperatures low, avoid impact wrenches when drawing down high-pitch threads, and choose TiN (titanium nitride) or Type II anodized finishes, which provide a durable dry-lubricated barrier.
What torque values should be used for ISO 4018 titanium hex bolts?
Because titanium has an elastic modulus of ~114 GPa (roughly half that of steel) and different friction characteristics, never use standard carbon steel torque charts. For dry Gr5 Ti-6Al-4V metric fasteners, torque values are roughly 15–20% lower than Grade 8.8 steel to achieve the same target bolt stretch. When applying anti-seize paste with a friction coefficient of μ=0.10, torque values must be reduced by 30% to 40% from dry values to avoid over-tensioning. Yevzo supplies calculated torque-tension engineering charts tailored to your fastener size and joint lubrication.
Are ISO 4018 titanium hex bolts compatible with carbon fiber reinforced polymers (CFRP)?
Yes. Unlike aluminum and plain carbon steel, which suffer severe galvanic corrosion when in contact with carbon fiber, titanium has an electrochemical potential practically identical to carbon. Titanium fasteners can be placed directly through carbon fiber laminates without dielectric isolating sleeves or sacrificial coatings, making ISO 4018 Gr5 bolts standard hardware in advanced composites, aerospace structures, and racing chassis.
What quality verification documentation accompanies each shipment?
Shipments from Yevzo Titanium Metal Co., Ltd. include an EN 10204 3.1 Inspection Certificate. This document records the raw ingot melt number, chemical composition breakdown (Fe, C, N, H, O, Ti), and room-temperature tensile test results (tensile strength, yield strength, elongation, area reduction). Shipments also include dimensional optical measurement reports, thread gauge pass records (Go/No-Go 6g), and certificate of conformity with ISO 4018 / DIN 558 standards.
What is your minimum order quantity (MOQ) and production turnaround?
For stocked standard ISO 4018 sizes (M5 to M20 in Grade 5 plain finish), our minimum order quantity starts at 20–50 pieces with dispatch within 48 to 72 hours. Custom lengths, non-standard pitches, custom broached heads, or anodized/PVD-coated runs typically start at 100 to 200 pieces, with production runs completed in 12 to 18 business days.
Request an Engineering Quote on ISO 4018 Titanium Hex Bolts
Connect directly with Yevzo's Baoji engineering team. Whether you need an urgent stock shipment of standard DIN 558 / ISO 4018 bolts or custom multi-axis CNC drawings turned to strict tolerances, our technical sales engineers respond within 12 business hours.
Rapid Engineering Inquiry
- Technical Drawings (PDF, 2D DWG, 3D STEP)
- Titanium Specification: Grade 2 CP or Grade 5 (Ti-6Al-4V)
- Surface Treatment: Plain, PVD, Nitriding, Anodized