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Marine & Offshore Materials

Seawater-resistant materials for maritime vessels, offshore platforms, and subsea equipment

Seawater ResistantOffshore PlatformsDuplex SteelSubsea Equipment

Materials for Harsh Marine Environments

Marine and offshore applications present unique challenges including seawater corrosion, biofouling, extreme weather conditions, and high mechanical loads. Materials must provide long-term reliability in these harsh environments while maintaining structural integrity and operational safety.

Howco provides specialized marine-grade materials and manufacturing services designed to withstand the corrosive effects of seawater and the demanding conditions of offshore operations.

Offshore Platforms

  • • Platform structures
  • • Drilling equipment
  • • Production facilities
  • • Riser systems
  • • Mooring systems

Subsea Equipment

  • • Subsea manifolds
  • • Pipeline systems
  • • Wellhead equipment
  • • Control systems
  • • Umbilicals

Marine Vessels

  • • Hull structures
  • • Propulsion systems
  • • Deck equipment
  • • Cargo systems
  • • Safety equipment

Seawater Systems

  • • Cooling systems
  • • Ballast systems
  • • Fire protection
  • • Desalination plants
  • • Heat exchangers

Port Infrastructure

  • • Dock structures
  • • Loading systems
  • • Crane components
  • • Piping systems
  • • Storage tanks

Renewable Energy

  • • Offshore wind turbines
  • • Wave energy systems
  • • Tidal generators
  • • Support structures
  • • Transmission systems

Marine Environmental Challenges

Seawater Corrosion

Chloride-induced pitting and crevice corrosion

Biofouling

Marine organism attachment and growth

Mechanical Loading

Wave action and dynamic stresses

Temperature Cycling

Thermal expansion and contraction

Marine-Grade Material Solutions

Duplex Stainless Steels

Standard Duplex

  • 2205 (F51): General seawater applications
  • 2304: Lean duplex for brackish water
  • F60: Improved chloride resistance

Super Duplex

  • 2507 (F53): High chloride environments
  • Zeron 100: Extreme seawater conditions
  • SAF 2906: High-strength applications

Super Austenitic Stainless Steels

6% Molybdenum Grades

  • 254 SMO: Seawater cooling systems
  • AL-6XN: Superior chloride resistance
  • 654 SMO: Enhanced pitting resistance

Specialty Grades

  • 926: High-temperature seawater
  • 1925hMo: Extreme chloride applications
  • Sanicro 28: Superior corrosion resistance

Nickel Alloys

Copper-Nickel Alloys

  • 70/30 CuNi: Seawater piping systems
  • 90/10 CuNi: Heat exchanger tubes
  • Monel 400: Marine hardware

High-Performance Alloys

  • Inconel 625: Subsea equipment
  • Hastelloy C-276: Extreme environments
  • Alloy 686: Seawater desulfurization

Titanium Alloys

Commercial Grades

  • Grade 1/2: Seawater heat exchangers
  • Grade 7: Enhanced corrosion resistance
  • Grade 12: Higher strength applications

Marine Applications

  • • Seawater cooling systems
  • • Ballast water treatment
  • • Propeller shafts
  • • Submarine hulls

Marine Manufacturing Services

Fabrication Services

  • • Large structure fabrication
  • • Precision machining
  • • Marine welding
  • • Assembly services

Surface Treatment

  • • Passivation
  • • Anti-fouling coatings
  • • Cathodic protection
  • • Surface finishing

Quality Assurance

  • • DNV GL certification
  • • ABS compliance
  • • Seawater testing
  • • Material traceability

Marine Industry Standards

DNV GL
Marine Classification
ABS
American Bureau of Shipping
ASTM A923
Duplex Steel Testing
NORSOK M-001
Material Selection

Navigate Marine Material Challenges

Let our marine materials experts help you select the optimal solutions for your offshore and maritime applications.

Contact Our Marine Team