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Inox Steel India is a trusted manufacturer, supplier, and exporter of Marine & Offshore Components manufactured from Duplex Stainless Steel and Stainless Steel 316L, specifically engineered for seawater service, chloride-rich environments, and offshore operating conditions. Our components are widely supplied to shipbuilding yards, offshore oil & gas projects, marine engineering companies, and coastal infrastructure projects across India and global markets.
Marine and offshore environments demand materials with exceptional corrosion resistance, high mechanical strength, and long service life. Duplex stainless steels and SS 316L offer an ideal balance of pitting resistance, stress corrosion cracking resistance, and structural reliability, making them the preferred choice for marine-grade applications. Inox Steel India supplies these materials in bright bar and precision-machined component form, ensuring readiness for fabrication and assembly.
Marine & Offshore Components are critical parts used in saltwater-exposed and submerged environments, where materials must withstand continuous exposure to seawater, chlorides, pressure, and mechanical loads without degradation.
Each component is produced to ensure corrosion resistance, dimensional stability, and mechanical integrity under harsh marine conditions.
Duplex stainless steels and SS 316L are globally recognized as marine-grade materials due to their superior resistance to corrosion and mechanical stress.
Key Advantages:
Duplex grades such as 2205 and 2507 provide higher yield strength and PREN values, while SS 316L offers proven corrosion resistance and ease of fabrication for marine components.
All materials are supplied with EN 10204 3.1 / 3.2 Mill Test Certificates, ensuring full traceability and compliance with international standards.
MARINE & OFFSHORE COMPONENTS – MASTER TECHNICAL DATA SHEETÂ
Materials: Duplex Stainless Steel & SS 316L
| Parameter / Property | Marine & Offshore Components |
|---|---|
| Application Category | Marine & Offshore |
| Typical Components | Shafts · Fasteners · Valves · Flanges · Structural Parts · Machined Components |
| Primary Materials | Duplex Stainless Steel · Super Duplex Stainless Steel · Stainless Steel 316L |
| Common Grades | Duplex 2205 (S31803 / S32205) · Super Duplex 2507 (S32750) · SS 316L |
| Applicable Standards | ASTM · ASME · EN · DIN · ISO |
| ASTM Specifications | ASTM A182 · A240 · A276 · A479 · A790 (material dependent) |
| Raw Material Forms | Bright Bars (Cold Drawn · Polished · Centerless Ground · Custom Cut Lengths) |
| Component Shapes | Round · Stepped · Threaded · Precision Machined |
| Diameter Range | 6 mm – 250 mm |
| Length Range | As per drawing / project requirement |
| Diameter Tolerance | h6 / h7 / h8 / h9 |
| Surface Finish (Ra) | ≤ 0.8 – 1.6 µm (finish dependent) |
| Corrosion Resistance | Excellent resistance to seawater, chlorides & pitting |
| Mechanical Strength | High yield & tensile strength (Duplex grades) |
| PREN Value | SS 316L ≈ 25 · Duplex 2205 ≈ 35 · Super Duplex 2507 ≥ 40 |
| Operating Environment | Seawater · Offshore platforms · Coastal & submerged conditions |
| Heat Treatment Condition | Solution Annealed |
| Machining Compatibility | CNC Turning · Milling · Drilling · Threading |
| Testing Performed | Chemical · Mechanical · PMI · Dimensional · Corrosion |
| Certification | EN 10204 3.1 / 3.2 |
| HSN / HS Code | 7222 |
| Industries Served | Shipbuilding · Offshore Oil & Gas · Marine Engineering |
| Packaging | Seaworthy export packing · Palletized / Crated |
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Marine & Offshore Components supplied by Inox Steel India are engineered to perform in highly corrosive seawater environments, where exposure to chlorides, pressure, humidity, and cyclic mechanical loads is continuous. Material selection between SS 316L, Duplex 2205, and Super Duplex 2507 is based on corrosion severity, strength requirement, and design life.
Tight dimensional control ensures reduced vibration, proper sealing, and extended service life in marine applications.
Performance Highlights:
PREN Values:
SS 316L ≈ 25 · Duplex 2205 ≈ 35 · Super Duplex 2507 ≥ 40
| Material | Approx. Price (INR / kg – Ex-Mumbai) | Approx. Price (USD / kg – FOB India) |
|---|---|---|
| SS 316L | ₹ 280 – ₹ 420 | $ 3.35 – $ 5.05 |
| Duplex 2205 | ₹ 420 – ₹ 650 | $ 5.05 – $ 7.85 |
| Super Duplex 2507 | ₹ 750 – ₹ 1,200 | $ 9.00 – $ 14.40 |
Prices depend on size, finish, machining complexity, and project quantity.
All marine & offshore components undergo stringent testing to ensure seawater suitability:
Supplies are delivered with EN 10204 3.1 / 3.2 Mill Test Certificates.
Inox Steel India is a dependable manufacturer, supplier, and exporter of Marine & Offshore Components in Duplex Stainless Steel and SS 316L, engineered for long-term seawater exposure, offshore pressure systems, and corrosive marine environments. Our components are trusted by shipyards, offshore EPC contractors, and marine engineering companies for their corrosion resistance, mechanical strength, and dimensional reliability.
Our Core Strengths:
| Sector | Typical Applications |
|---|---|
| Shipbuilding & Repair | Shafts, fasteners, structural parts |
| Offshore Oil & Gas | Valve components, connectors, studs |
| Marine Engineering | Seawater handling systems |
| Ports & Coastal Infrastructure | Corrosion-resistant assemblies |
| Subsea & Offshore Platforms | High-strength duplex components |
Marine & offshore components are selected where failure is not an option, and material performance directly impacts safety and service life.
All marine & offshore components are packed to meet international marine-export standards:
Export Destinations:
UAE · Saudi Arabia · Oman · Qatar · Norway · Nigeria · South Africa · UK · Europe · USA
Ports of Dispatch:
JNPT (Mumbai) · Mundra · Hazira
At Inox Steel India, we supply marine & offshore components engineered to resist seawater corrosion and perform reliably in offshore conditions.
52-A, Mulji Thackersi Bldg, Islampura Street, Shop No. 10, Near Alankar Cinema, Mumbai – 400 004
alloy@inoxsteelindia.in, steel@inoxsteelindia.in
+91 9930796690
Yes. Duplex and SS 316L are widely used for seawater and marine atmospheric exposure when properly specified and processed. Yes, ferrite content testing can be provided on request to ensure phase balance. Yes, custom cut lengths are supplied to improve fabrication and machining efficiency. Yes, heat number traceability and EN 10204 certification are maintained. Are these hex bars suitable for seawater immersion?
Is ferrite content controlled for duplex grades?
Are custom cut lengths available for offshore projects?
Is certification maintained after cutting and finishing?
Inox Steel India manufactures and supplies marine & offshore components in Duplex stainless steel and SS 316L. Seawater-resistant, certified & export-ready. Supplier near Alankar Cinema, Mumbai.