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Structural Plates for Offshore & Marine Structures – Corrosion-Resistant Steel for Harsh Environments

Offshore oil rigs, shipbuilding, marine docks, and underwater pipelines require heavy-duty structural steel plates that offer not just mechanical strength but also outstanding corrosion resistance in saline and submerged conditions. Hindustan Steel Corporation supplies marine-grade plates built to perform in sea spray, tidal zones, and subsea environments.

What Are Structural Steel Plates Used for in Marine Industry?

Structural plates are used in:

  • Offshore oil and gas platforms
  • Marine crane foundations and helidecks
  • Underwater pipelines and bracing structures
  • Ship hulls, decks, and keels
  • Port jetties, piling reinforcements
  • Subsea modules and structural frames

Where Are These Plates Commonly Installed?

We supply steel for:

  • Jack-up rigs and FPSO units
  • Naval and commercial vessels
  • Marine support vessels and barges
  • Coastal bridge piling and anchor cages
  • Wind turbine foundations in offshore farms
  • Subsea manifold and conductor structures

Mechanical Properties for Offshore Plate Applications

Standard mechanical targets include:

  • Yield strength: 355 MPa to 690 MPa
  • Tensile strength: 490–770 MPa
  • CVN (Charpy V-notch) tested at -20°C/-40°C
  • High elongation > 22%
  • Excellent weldability and fracture resistance

Best Steel Grades for Offshore & Marine Use

  • EN 10025 S355G8+N / S355G10+M (Offshore)
  • ASTM A131 Gr AH36 / DH36 (Shipbuilding)
  • API 2H Gr 50 (offshore platforms)
  • SAILMA 450 / 550 (marine piling)
  • Dillimax 690T, NAXTRA 70 (for heavy-duty modules)

Sizes, Thickness Range & Custom Supply

  1. Thickness: 6mm to 100mm
  2. Widths: 1500mm, 2000mm, 2500m
  3. Length: Up to 12m or cut-to-length
  4. CNC profile: base ring, flange, collar, stiffener
  5. Sub-assemblies on request: bracket kits, support frames

Marine Fabrication Readiness

  • All plates shot-blasted and primer-coated
  • Weldable with low CE values
  • Surface profile suitable for marine coatings
  • Toughness-tested for -20°C / -40°C zones
  • Mill test + ultrasonic test available

Why Choose Hindustan Steel Corporation?

  • Stockist of marine/offshore-approved grades
  • Experience in supplying to oil rigs and shipyards
  • Partnered with EPCs, marine engineers, port authorities
  • Quick dispatch from Mumbai port to global yards
  • 100% traceable, MTC-certified, DNV/ABS/IRS compliant

Related Marine Plate Products

  • AH36/DH36 shipbuilding plates
  • Offshore platform base & deck steel
  • Marine stiffener & gusset plate kits
  • S355G10+M piles for jetties
  • Subsea module structural plates

Marine Plate Exports by Hindustan Steel Corporation

We export to:

  • UAE: Marine EPCs and jetty builders
  • Singapore: Shipyards and FPSO projects
  • Qatar: Offshore wind and gas platform yards
  • South Korea & Vietnam: Barge/ship construction
  • Africa: Port infrastructure, marine piling
  • South America: Subsea module fabricators

Logistics offered:
DNV / IRS / ABS compliant | DPU / CIF / FOB terms | SGS inspection

Buyer Guide – How to Select Marine Steel Plates

  • Use S355G10+M or A131 Gr AH36 for offshore platforms
  • Ensure CVN and UT tests are included in inspection scope
  • For shipbuilding, check Class approval (ABS, DNV, etc.)
  • Prefer primer-coated plates for immediate yard use
  • Request CNC-cut base and ring flanges to save time

Certifications & Compliance

  • ISO 9001:2015
  • EN 10204 3.1 / 3.2 MTCs
  • DNV-GL / ABS / IRS Approval (on request)
  • CE Marked Plates for Europe
  • TPI: BV, SGS, TUV inspection supported

FAQs for Offshore & Marine Steel Plate Queries

Yes, we offer ASTM A131 AH36, DH36 with class approvals.

Absolutely. We deliver plates shot-blasted and primer-coated.

Yes, with appropriate marine-grade coatings and CVN-tested steel.

We offer 3.2-certified plates with mill and third-party inspections.

Yes, CNC-cut parts, flanges, and bracket kits are available.

Steel strapped, corner protected, polywrapped, and container-ready.

Yes, S355G8/G10 grades and SAILMA plates are ideal for that.

Yes, CVN impact tested plates are provided on request.

Every order includes MTC, UT scan, coating certificate, and inspection report.

Book Your Marine Plate Requirement Today

Sea-port ready dispatch | Primer-coated | CNC profile cut
Serving shipyards, EPCs, marine construction globally

Call Now

+91-22-66159018
+91-9820944724

Email

sales@hindustansteel.com hindustansteel1@gmail.com

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390/392, Ground Floor, Shankar Mansion, S.V.P. Road, Mumbai – 400004, India

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Call Now

+91-22-66159018
+91-9820944724

Email

sales@hindustansteel.com hindustansteel1@gmail.com