Corrosion-Resistant Titanium CNC Machining for Marine & Subsea Engineering
Custom precision titanium component manufacturing designed to survive extreme hydrostatic pressure, eliminate chloride pitting, and stop crevice corrosion in deep-sea oceanographic applications. Grade 2 and Grade 12 specialty titanium alloys.
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Multi-Axis CNC Milling — Deep-Sea Pressure Vessels, Instrumentation Housings & ROV Connector Blocks
Precision CNC machining of Grade 2 and Grade 5 Titanium for subsea pressure vessels, instrumentation enclosures, and ROV connector systems. Engineered for hydrostatic pressures exceeding 300 bar with corrosion-free performance in seawater environments.
Deep-Sea Pressure Vessels
Grade 2/5 Ti · 300+ bar · ASME PVHOSubsea instrumentation housings and pressure vessels must withstand extreme hydrostatic pressures while maintaining absolute seawater exclusion. Our precision machining of Grade 2 and Grade 5 Titanium delivers sealing surfaces with Ra ≤ 0.4 µm finish and O-ring groove tolerances that prevent leak paths at depths exceeding 300 bar.
Technical Implementation- O-ring groove dimensions to SAE AS568 — ±0.05 mm for consistent compression across temperature cycles
- Sealing surface finish Ra ≤ 0.4 µm — prevents seawater ingress at hydrostatic pressures exceeding 300 bar
- Pressure cycle testing to 1.5× rated depth — helium leak verification < 1×10⁻⁶ mbar·L/s
Connector Blocks & Through-Hull Fittings
±0.01 mm Positioning · Helium Leak TestedSubsea connector blocks and through-hull fittings require precise alignment of multiple sealing surfaces and pin locations. Our multi-axis CNC machining centers produce complex geometries with positional accuracy of ±0.01 mm, ensuring reliable mating of underwater mateable connectors.
Technical Implementation- Pin-to-pin spacing ±0.01 mm — ensures reliable alignment of multi-pin underwater mateable connectors
- Through-hole positioning ±0.02 mm — guarantees bolt-pattern compatibility with existing subsea infrastructure
- Tapered thread forms per API 5B — leak-proof connections for hydraulic and pneumatic control lines
Precision CNC Turning — Grade 12 Titanium Marine Fasteners & Crevice Corrosion Mitigation
Specialized precision turning of Grade 12 Titanium (Ti-0.3Mo-0.8Ni) for marine fasteners and splash-zone hardware.
Grade 12 Titanium Turning
CNC Turning · Ti-0.3Mo-0.8Ni · Marine FastenersGrade 12 Titanium (Ti-0.3Mo-0.8Ni) is engineered for aggressive marine environments where standard titanium alloys may experience crevice corrosion.
Technical Implementation- Ra ≤ 0.4 µm thread finish — eliminates chloride pitting on fastener threads
- Multi-pass cold reduction — prevents hydrogen embrittlement in splash-zone fasteners
- 100% dimensional and surface finish inspection — verifies all marine fastener specifications
Subsea Valve Block Manufacturing
CNC Turning · Ra ≤ 0.4 µm · NPT Thread FormsSubsea hydraulic systems require valve blocks with corrosion-resistant fluid channels.
Technical Implementation- Mirror finish sealing surfaces — eliminate crevice corrosion sites at valve body interconnections
- NPT/API thread forms per ASME B1.20.1 for subsea hydraulic systems
- Dye penetrant inspection on all sealing surfaces — verifies zero surface-breaking defects
CMM Dimensional Validation — Hydrostatic Pressure Testing & O-ring Seal Validation
Absolute dimensional control via CMM validation to ASME Y14.5 GD&T, paired with documented hydrostatic pressure testing.
CMM O-ring Seal Validation
ZEISS CMM · ±1.9 µm · Sealing Surface GD&TSubsea seal integrity begins with geometrically perfect O-ring groove housings.
Technical Implementation- O-ring groove dimensional verification
- Sealing surface roughness Ra ≤ 0.4 µm — ensures O-ring compression control
- CMM reports provided with each lot per ASME Y14.5
Hydrostatic Pressure Testing
1.5× Rated Depth · Helium Leak Test · Documented CertificationEvery subsea component undergoes hydrostatic pressure testing to 1.5× rated depth pressure.
Technical Implementation- Hydrostatic pressure test to 1.5× rated pressure with documented certification
- Helium leak testing available for critical assemblies
- Test certificates traceable to component serial number
100% Material Traceability — EN 10204 3.1 MTR, Heat Number & Low-Iron Validation for Marine Service
Every marine-grade component is backed by EN 10204 3.1 Mill Test Reports with deep-etched heat numbers.
EN 10204 3.1 & Heat Number Marking
Every lot of Grade 2, Grade 5, and Grade 12 Titanium is certified with EN 10204 Type 3.1 documentation.
- Chemical composition per ASTM B265/B348 with Fe ≤ 0.20% for Grade 12
- Deep-etched heat number on every component for permanent traceability
- Digital archive for over 10 years — fully retrievable for regulatory audits
Galvanic Corrosion Prevention
In seawater, galvanic couples between dissimilar metals accelerate corrosion.
- Titanium is noble relative to stainless steel, copper, and aluminum
- Iron contamination control per NACE SP0198
- Dedicated tooling and coolant lines for marine-grade titanium
Guidance for the professionals who specify titanium
Role-specific answers and resources for engineers and buyers in this industry.
Common questions from this audience
Which titanium grade resists seawater corrosion for marine components?
Commercially pure grades (2) and Ti-6Al-4V are widely used offshore for their outstanding resistance to seawater and chloride-induced corrosion.
Can you manufacture propellers, shafting and seawater hardware?
Yes—we machine, fabricate and weld titanium for marine propellers, shafting, fasteners and structural hardware.
Do you provide marine-grade material certification?
Yes—full material certification and traceability are provided for every marine titanium component.
Related resources
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Marine & Subsea Titanium CNC Machining?
Submit your engineering drawings or CAD models for a complimentary Design for Manufacturability (DFM) analysis. Our engineering team will review your requirements and respond with a competitive quote within 24 hours.
Engineering response within 24 hours · CAD models accepted in STEP, IGES, STL formats
One Metal. One Focus. Infinite Precision.
Founded in 2011 in Baoji's Titanium Valley, BOZE Metal is dedicated exclusively to titanium — from raw material to precision engineering. AS9100D, ISO 13485 & ISO 9001 certified with 500+ clients across Aerospace, Medical & Motorsport industries, we deliver end-to-end precision titanium CNC machining with full material traceability from source to component.
Boze Titanium Manufacturing Center is operated by Baoji Boze Metal Products Co., Ltd.