Verified at 60MPa: Where Science Meets Deep-Sea Reliability.
Using aerospace-grade materials and rigorous hydrostatic testing to ensure your subsea systems perform flawlessly at depths of up to 6,000 meters.
Advanced Material Science for the Abyssal Zone
Selecting the right alloy is critical to subsea longevity. HYSF utilizes premium, traceable materials engineered to survive extreme pressure and prevent galvanic corrosion.

Hard-Anodized Aluminum Alloy (6061-T6 / 7075)
Aluminum is the backbone of the modern underwater robotics industry, balancing structural strength with extreme weight efficiency. By applying advanced hard-anodizing treatments, we transform standard aluminum into a high-performance subsea housing capable of resisting the harsh chemical attacks of saline water. This material is specifically engineered for dynamic platforms where maneuverability and neutral buoyancy are critical mission parameters.
- The Lightweight Advantage: Aluminum is the premier choice for ROVs, AUVs, and portable subsea instruments, offering an exceptional strength-to-weight ratio that optimizes vehicle buoyancy and payload capacity.
- Superior Corrosion Barrier: Every aluminum component undergoes a rigorous hard-anodizing process, creating a dense, ceramic-like protective layer that shields the base metal from saltwater oxidation and surface wear.
- Optimal Thermal Management: With excellent thermal conductivity, our aluminum housings effectively dissipate heat generated by high-current connectors, protecting internal electronics during extended operations.
- Cost-Efficient Engineering: Aluminum provides a high-performance, cost-effective alternative to exotic metals, making it ideal for both rapid prototyping and large-scale commercial subsea deployments.

316L Stainless Steel (Premium Marine Grade)
As the most trusted material in offshore oil and gas, 316L Stainless Steel provides a rugged, low-maintenance solution for long-term deployments. Its high Chromium and Nickel content, combined with Molybdenum, creates a stable passive layer that prevents structural failure in aggressive environments. Our 316L components are precision-machined to serve as the reliable heart of permanent subsea infrastructure.
- The Industry Standard: Known for its versatility and ruggedness, our 316L stainless steel is enriched with Molybdenum to provide superior resistance against pitting and crevice corrosion in saline environments.
- Precision Sealing Surfaces: Utilizing advanced CNC machining, we achieve micron-level surface finishes on all stainless steel housings, ensuring an absolute airtight seal for O-rings under extreme hydrostatic pressure.
- Structural Integrity: This material maintains high mechanical strength and impact resistance even in sub-zero Arctic waters, making it the reliable choice for fixed offshore platforms and subsea trees.
- Long-Term Reliability: Designed for a 20+ year service life, our 316L components are the backbone of critical subsea infrastructure where maintenance-free performance is mandatory.

Marine Bronze / Sea Copper Alloy
Specifically chosen for its unique biological and mechanical properties, Marine Bronze is the premier material for scientific and high-power applications. Unlike many other alloys, copper-based materials possess a natural toxicity to marine microorganisms, preventing the buildup of bio-fouling that can interfere with connector mating. It is the ideal choice for equipment that remains stationary on the seabed for years.
- Natural Anti-Biofouling: Copper alloys naturally inhibit the growth of barnacles, algae, and other marine organisms, keeping connector interfaces clean and functional during multi-year deployments.
- High Wear & Galling Resistance: Unlike stainless steel, marine bronze provides excellent natural lubricity, preventing thread galling and mechanical seizing during repetitive mating cycles in the field.
- Enhanced Conductivity: Ideal for high-power distribution units (up to 180A), this alloy combines structural strength with high electrical and thermal conductivity to ensure system health.
- Scientific Grade: Preferred by oceanographic research institutions for long-term benthic observatories and sensitive acoustic sensor arrays where biological growth must be minimized.

PEEK & Engineered Polymers
When total electrical isolation or zero-corrosion risk is required, high-performance polymers like PEEK represent the peak of material engineering. These advanced plastics are immune to the electrochemical processes that affect metals, making them ideal for hybrid systems or extremely sensitive sensor housings. PEEK offers the reliability of metal with the added benefits of non-conductivity and extreme weight reduction.
- Absolute Corrosion Immunity: As a high-performance non-metallic material, PEEK is completely immune to galvanic corrosion, making it the perfect solution for hybrid metal-plastic systems.
- Exceptional Dielectric Strength: Provides world-class electrical insulation, ensuring clean signal transmission and zero leakage current, even in high-humidity and high-pressure deep-sea environments.
- Chemical & Hydrolysis Stability: Resistant to a wide range of subsea chemicals, including hydraulic fluids and oils, without absorbing water or losing dimensional stability over time.
- Extreme Weight Reduction: Significantly lighter than any metal alloy, these engineered polymers are crucial for micro-ROVs, diver-held equipment, and systems requiring neutral buoyancy.

Simulating Real-World Deployment
We perform multi-cycle pressure testing to simulate the repetitive launch and recovery of ROVs and AUVs. This ensures that seals and overmolding maintain their integrity after hundreds of deep-sea dives, not just a single immersion.
- Simulated Deployment: Repeatedly pressurizing to 60MPa to mirror the stress of ROV launch and recovery cycles.
- Fatigue Analysis: Assessing material and seal performance under repetitive mechanical loading.
- Seal Memory Test: Verifying that O-rings and gaskets return to their original shape after pressure release.
- Engineering Assurance: Guarantees zero structural deformation across hundreds of subsea missions.

Integrity Under Load
Unlike standard batch testing, we monitor insulation resistance and circuit continuity during the pressure cycle. This allows us to detect even microscopic leaks or signal fluctuations that only occur at peak depths.
- Dynamic Measurement: Continuous monitoring of insulation resistance ($>200\text{ M}\Omega$) during the compression phase.
- Signal Integrity Tracking: Measuring circuit continuity and signal attenuation for Ethernet/Coax under full load.
- Micro-Leak Detection: Identifying microscopic ingress that may only occur when the connector body is under peak hydrostatic pressure.
- Engineering Assurance: Ensures no signal drops or short circuits occur, even at the ocean's deepest points.

Long-Term Deployment Stability
For scientific observatories and offshore infrastructure, we conduct extended "soak" tests where components are held at maximum pressure for 24-72 hours. This verifies material stability and seal performance for long-term seabed installations.
- 72-Hour Hold Capability: Sustaining peak pressure for up to 3 days to verify performance for long-term seabed installations.
- Material Stability Audit: Monitoring for any polymer swelling or metal creeping under continuous high-pressure exposure.
- Permeation Testing: Ensuring that no moisture permeates through the polyurethane/neoprene molding during long-term soaking.
- Engineering Assurance: Proven stability for permanent subsea infrastructure and scientific observatories.

Full Transparency & Traceability
Every custom order comes with a detailed Hydrostatic Test Report. We provide our B2B partners with full data transparency, including pressure curves, material heat numbers, and electrical audit results for total peace of mind.
- Full Data Transparency: Providing digital pressure-time curves and electrical audit logs for every customized order.
- Material Traceability: Inclusion of MTRs (Material Test Reports) and heat numbers for all metal components (316L/Aluminum).
- Pre-shipment Validation: Every customized assembly is serialized and carries a unique "Pass" certificate from our QC lab.
- Engineering Assurance: Complete documentation to satisfy the most stringent international offshore project standards.
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John Zhang
ADMINISTRERENDE DIREKTØR
- info@hysfsubsea.com
- +86 13942853869




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