• Marine-Grade Stainless Steel Sheet – Superior Corrosion Resistance for Saltwater & Coastal Environments

Marine-Grade Stainless Steel Sheet – Superior Corrosion Resistance for Saltwater & Coastal Environments

Marine-Grade Stainless Steel Sheet

The Marine-Grade Stainless Steel Sheet is engineered for extreme durability and long-term corrosion resistance in harsh marine, coastal, and saltwater environments. Typically manufactured from high-chromium, high-nickel, and molybdenum-enhanced stainless steel alloys like 316/316L or 2205 Duplex Stainless Steel, this sheet material offers excellent protection against pitting, crevice corrosion, and chloride-induced corrosion.

Marine-Grade Stainless Steel Sheets are widely used in shipbuilding, offshore platforms, coastal structures, marine hardware, and chemical processing equipment where exposure to saltwater and aggressive conditions demand superior performance.


Key Feature

  • Exceptional Corrosion Resistance
    Resists pitting, crevice corrosion, and stress-corrosion cracking caused by saltwater, chlorides, and marine atmospheres.

  • Long-Term Durability
    Provides excellent strength and corrosion protection even after years of constant exposure to seawater and coastal air.

  • Excellent Weldability
    Easily fabricated using standard welding processes without compromising corrosion resistance.

  • Outstanding Formability
    Can be cut, bent, and shaped into complex components while maintaining strength and corrosion resistance.

  • Versatile Surface Finishes
    Offered in a wide range of finishes for both functional and decorative marine applications.

  • Low Maintenance
    Minimizes repair and replacement costs, even in highly corrosive environments.


Applications of Marine-Grade Stainless Steel Sheet

  • Shipbuilding and boat components

  • Offshore oil & gas platforms

  • Coastal and harbor structures

  • Marine railings, ladders, and hardware

  • Desalination plants

  • Seawater piping and heat exchangers

  • Marine HVAC systems

  • Water treatment equipment

  • Architectural facades in coastal cities

  • Marine-grade food processing and fishery equipment


Technical Specifications

PropertySpecification
Material316 / 316L / 2205 Duplex Stainless Steel
StandardASTM A240 / A666, EN 10088, JIS G4304
Tensile Strength515–750 MPa
Yield Strength200–550 MPa
Elongation≥ 40%
Hardness≤ 95 HRB
Thickness Range0.5mm – 50mm
Sheet Width Up to 2000mm
LengthStandard 2000mm, 2440mm, 3000mm or custom
Surface Finish2B, BA, No.1, No.4, HL, Mirror
WeldabilityExcellent
Corrosion ResistanceExcellent (marine-grade level)

Chemical Composition

Chemical
Chromium (Cr)16.0–23.0% (depending on grade)
Nickel (Ni)10.0–14.0% (depending on grade)
Molybdenum (Mo)2.0–3.5% (depending on grade)

Available Surface Finishes

FinishDescriptionApplication
2BSmooth, matte finishGeneral marine fabrication
BABright annealedDecorative marine interiors
No.1Hot rolled, annealed & pickledHeavy structural marine applications
No.4Brushed satinMarine railings, architectural elements
HLHairline finishDecorative and architectural panels
MirrorPolished reflective surfaceHigh-end marine and yacht interiors

Common Grades for Marine-Grade Stainless Steel Sheet

  • 316 Stainless Steel:
    The most commonly used marine-grade stainless steel. Offers excellent corrosion resistance due to its molybdenum content, especially against chlorides and saltwater.

  • 316L Stainless Steel:
    Low carbon version of 316, preferred for heavy welding applications where intergranular corrosion needs to be minimized.

  • 2205 Duplex Stainless Steel:
    Superior strength, pitting resistance, and excellent stress-corrosion cracking resistance — ideal for heavy-duty marine and offshore applications.


Manufacturing Standards

  • ASTM A240 / A480 / A666

  • EN 10088-2

  • JIS G4304 / G4305

  • ISO 9001 Certified Production

  • Mill Test Certificates (MTC) Provided

  • RoHS & REACH Compliant


Packaging & Delivery

  • PVC protective film for polished surfaces

  • Waterproof packaging with anti-corrosion materials

  • Edge protection and wooden crates for safe transport

  • Custom cutting, slitting, and polishing services available

  • Global shipping with fast and reliable logistics


Storage & Handling Recommendations

  • Store indoors or under cover in dry environments

  • Use non-marking lifting equipment to protect finishes

  • Avoid prolonged contact with carbon steel to prevent contamination


Advantages of Choosing Marine-Grade Stainless Steel Sheet

  • Long-lasting performance in highly corrosive marine and saltwater environments

  • Suitable for welding, bending, forming, and precision cutting

  • Wide range of thicknesses, finishes, and grades for every application

  • Low maintenance and lifecycle cost even in harsh outdoor exposure

  • Superior hygiene for marine food processing, fisheries, and aquaculture

  • Highly durable for both structural and decorative uses


FAQ For This Product

What makes stainless steel marine-grade?Marine-grade stainless steel contains higher chromium, nickel, and molybdenum, providing superior resistance to chlorides, pitting, and crevice corrosion caused by saltwater.Which grade of stainless steel is best for marine environments?316 and 316L are widely used for general marine applications, while 2205 Duplex is recommended for heavy-duty, high-stress offshore structures.Can marine-grade stainless steel sheets be welded?Yes, they offer excellent weldability using standard techniques while maintaining corrosion resistance after welding.Do you offer custom sizes and finishes?Absolutely. We provide custom cutting, slitting, polishing, and surface finishes tailored to your project requirements.Do you provide certifications?Yes. Full Mill Test Certificates (MTC) and compliance documentation are provided with every order.Is marine-grade stainless steel safe for food and beverage use?Yes, grades like 316 and 316L are FDA-approved for food processing, marine food handling, and sanitary applications.

Packaging & Delivery

At Erikco World, we take packaging and delivery seriously to ensure that every order reaches our customers in perfect condition. Each product is carefully packed using export-grade protection to safeguard against moisture, rust, and handling damage during transit. Our team follows strict international standards so that whether it is coils, sheets, or structural steel, every item is prepared for safe long-distance shipping.

For delivery, we work with trusted global logistics partners to provide fast and reliable shipping solutions to every region of the world. From the moment an order is confirmed, our logistics team manages the process closely to guarantee smooth customs clearance, accurate documentation, and timely arrival. Whether by sea, land, or air, we make sure your products are delivered securely and on schedule.

With Erikco World, you can rely on professional packaging and dependable delivery that reflect our commitment to quality and customer satisfaction at every stage.

Packaging & Delivery - Erikco World

Enquiry Us Now