Will this connector material work in my environment?

Material Selection Guide

Quick Material Selector

Material Options Explained

304 Stainless Steel

• Best for: Freshwater, occasional saltwater exposure
• Pros: Lowest cost, good general corrosion resistance
• Cons: Not ideal for continuous saltwater immersion
• Cost: $ (baseline)
• HYSF use: Freshwater applications only

316L Stainless Steel (Our Standard)

• Best for: 90% of marine applications
• Pros: Excellent saltwater resistance, good strength, reasonable cost
• Cons: Can experience crevice corrosion in stagnant conditions
• Cost: $$ (20-30% more than 304)
• HYSF use: Standard material for all saltwater connectors

Duplex 2205 Stainless

• Best for: Harsh marine environments
• Pros: 2x corrosion resistance vs 316L, higher strength
• Cons: Higher cost, longer lead time
• Cost: $$$ (50-80% more than 316L)
• HYSF use: Available for harsh environment applications

Titanium Grade 5 (Ti-6Al-4V)

• Best for: Extreme conditions, weight-critical applications
• Pros: Virtually immune to corrosion, 45% lighter than steel, very strong
• Cons: Premium cost, longer lead time
• Cost: $$$$ (3-5x more than 316L)
• HYSF use: Deep water, high-performance applications

Aluminum (Anodized)

• Best for: Freshwater only, budget applications
• Pros: Lightweight, low cost
• Cons: Poor saltwater performance, galvanic corrosion risk
• Cost: $ (similar to 304)
• HYSF use: Not recommended for marine use

Environment-Specific Recommendations

Freshwater Applications

Examples: Lakes, rivers, pools, tanks, freshwater aquaculture

• Recommended: 316L stainless (standard)
• Why: Good corrosion resistance, cost-effective
• Avoid: Nothing specific, all materials work in freshwater

Coastal Saltwater

Examples: Harbors, bays, coastal aquaculture, shallow ROV

• Recommended: 316L stainless (standard)
• Why: Proven performance in typical saltwater
• Avoid: Aluminum, plain carbon steel

Open Ocean

Examples: Offshore oil & gas, deep water ROV, oceanographic

• Recommended: 316L stainless (standard), Titanium for critical
• Why: Continuous immersion, higher salinity
• Avoid: 304 stainless, aluminum

Harsh Environments

Examples: Hot water (>30°C), polluted harbors, high flow areas

• Recommended: Duplex 2205 or Titanium
• Why: Enhanced corrosion resistance
• Avoid: Standard 316L for critical applications

Deep Water (>2000m)

Examples: Deep sea research, subsea construction, deep ROV

• Recommended: Titanium Grade 5
• Why: Strength at extreme pressure, corrosion resistance
• Avoid: Standard stainless may deform at extreme depths

Galvanic Corrosion Warning

Problem: Connecting different metals in saltwater causes rapid corrosion

Example: Aluminum connector on steel housing = aluminum corrodes quickly

Solutions:

• Use same material for connector and housing when possible
• If different materials needed, use insulating gaskets
• Apply protective coatings
• Use sacrificial anodes

Material Comparison Table

Still Unsure?

Tell us about your application:

• 📧 Email: sales@hysfsubsea.com
• Include: Water type, temperature, depth, deployment type
• We’ll recommend: Best material for your needs and budget

Related: Materials Guide | Contact Us

Need material advice? Email sales@hysfsubsea.com with your environment details.