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SA 387 Gr.11 Cl.2 Plates Supplier & Exporter in India – Navgraha Steels INC (Mumbai, Maharashtra)

When you’re sourcing SA 387 Gr.11 Cl.2 Alloy Steel Plates, you’re not just ordering steel — you’re safeguarding an entire power plant, refinery, or pressure vessel project. A single delay or a wrong grade can mean millions lost in shutdown penalties. At Navgraha Steels INC, we understand this risk. That’s why global EPC contractors, boiler manufacturers, and refinery buyers trust us for genuine, certified Chrome Moly plates with on-time dispatch and traceable documentation.

Table of Contents

What Are SA 387 Gr.11 Cl.2 Plates and Why Are They Essential in High-Temperature Service?

SA 387 Grade 11 Class 2 is a Chrome-Moly pressure vessel steel plate specified under ASTM A387/ASME SA 387 standards.
It is designed for high-temperature service, especially in:

  • Boilers, heat exchangers, and storage tanks
  • Refinery heaters and petrochemical vessels
  • Thermal and nuclear power plants

Key reasons buyers choose this grade:

  •  Creep-resistant at high temperatures
  •  Excellent weldability & formability
  •  Long service life under pressure
  •  Globally approved for pressure vessels

In short: It’s the engineer’s safeguard against high-pressure, high-heat failures.

The Real Buyer Pain Points in Sourcing SA 387 Gr.11 Cl.2 Plates

Procurement teams often face:

  •  Suppliers mixing Cl.1 instead of Cl.2, causing compliance issues
  •  Plates without IBR, PED, or EN 10204 certification, risking rejection
  •  Delayed deliveries during refinery/power shutdowns
  •  Opaque pricing with hidden charges
  •  Stock limitations in thicker sizes (25mm–100mm)

At Navgraha Steels INC, we solve these problems with ready stock in Mumbai, transparent pricing, global certifications, and proven export reliability.

Applications of SA 387 Gr.11 Cl.2 Plates in Boilers, Pressure Vessels & Refineries

Our plates are engineered for industries where safety, compliance, and durability are non-negotiable:

  • Power Generation – boilers, superheaters, and nuclear reactors
  • Refineries & Petrochemicals – catalytic crackers, heaters, storage vessels
  •  Process Industries – chemical plants, fertilizer units, and thermal projects
  • EPC Projects – large-scale turnkey contractors across GCC, Africa, and Asia

Wherever high heat meets high pressure, SA 387 Gr.11 Cl.2 plates are the buyer’s shield against failure.

Mechanical Properties & Performance of SA 387 Gr.11 Cl.2 Plates

SA 387 Gr.11 Cl.2 Chrome-Moly plates are engineered to handle sustained high-pressure and high-temperature environments.

  • Yield Strength: 240 – 310 MPa (depending on thickness)
  • Tensile Strength: 415 – 585 MPa
  • Elongation: 18–22% (excellent ductility)
  • Impact Resistance: Ensures safety in high-heat cycles
  • Hardness (Brinell): Typically 170 – 220 HB

Buyer benefit: This balance of strength, toughness, and ductility ensures long service life in boilers and pressure vessels.

Chemical Composition of ASTM A387 Grade 11 Class 2 Plates

The composition is carefully controlled to deliver creep resistance and heat stability:

Element Content (%)
Carbon (C) 0.05 – 0.20
Manganese (Mn) 0.30 – 0.60
Silicon (Si) 0.50 – 1.00
Chromium (Cr) 1.00 – 1.50
Molybdenum (Mo) 0.45 – 0.65
Phosphorus (P) ≤ 0.035
Sulphur (S) ≤ 0.035

Buyer benefit: Chromium boosts oxidation resistance, while Molybdenum ensures creep resistance at elevated temperatures.

Standards, Approvals & Equivalent Grades of SA 387 Gr.11 Cl.2 Plates

  •  Standards: ASTM A387 / ASME SA 387 (Chrome-Moly plates)
  •  Equivalent Grades: EN 10028-2 13CrMo4-5, BS 622-515B
  •  Certifications: EN 10204 3.1 / 3.2, IBR Approved (India), PED Approved (EU)
  •  Third-Party Testing: SGS, TUV, BV, Lloyd’s Register

Buyer benefit: Fully compliant for refineries, boilers, and global EPC projects.

Thickness Range, Plate Sizes & Cutting Options We Supply

We maintain ready stock in standard and custom sizes:

  1. Thickness: 6 mm – 100 mm
  2. Width: 1500 mm – 3000 mm
  3. Length: 6000 mm – 12000 mm
  4. Cutting Options: Plasma, water jet, CNC machining, bevel cutting

Buyer benefit: Whether you need thin sheets or heavy boiler plates, we deliver cut-to-size material, ready for fabrication.

Heat Treatment, Welding & Durability of Chrome Moly SA 387 Gr.11 Cl.2 Plates

  • Heat Treatment: Supplied in Normalized and Tempered (N+T) condition
  • Weldability: Excellent with proper preheating/post-weld heat treatment (PWHT)
  • Durability: Withstands long exposure to 500–600°C temperatures

Buyer benefit: Reliable performance in power plants, refinery heaters, and petrochemical reactors without risk of premature failure.

Fabrication & Value-Added Services by Navgraha Steels INC

We don’t just supply plates — we deliver project-ready solutions:

  1.  Cut-to-size plates for faster assembly
  2.  CNC machining & drilling for fabrication shops
  3.  Bevelled edges for welding
  4.  Primer coating for corrosion resistance
  5.  Export-ready seaworthy packing

Buyer benefit: Save time, manpower, and fabrication cost with our value-added plate services.

Why Global Buyers Trust Navgraha Steels INC for SA 387 Gr.11 Cl.2 Plates

At Navgraha Steels INC, we know that in the refinery, power, and petrochemical industries, a late shipment or uncertified plate can shut down entire operations. That’s why global buyers trust us for:

  • Export Expertise – Regular shipments to UAE, Saudi Arabia, Qatar, Africa & Europe via JNPT/Nhava Sheva.
  • Authentic Documentation – EN 10204 3.1/3.2 MTCs, IBR approvals, PED certification.
  • On-Time Deliveries – Ready stock in Mumbai for urgent shutdown orders.
  • Transparent Pricing – No hidden charges, full clarity upfront.
  • Proven Track Record – Serving EPC contractors, boiler manufacturers, and oil & gas majors worldwide.

With Navgraha Steels INC, buyers get risk-free procurement with full compliance.

Popular Variants & Related Grades We Supply

Along with SA 387 Gr.11 Cl.2, we also supply:

  • SA 387 Gr.11 Cl.1 Plates
  • SA 387 Gr.22 Cl.2 Plates (higher creep resistance)
  • ASTM A204 Pressure Vessel Plates
  • IS 2002 Boiler Quality Plates

Buyers save time by sourcing all Chrome Moly & boiler grades from a single supplier.

Export Packaging, Logistics & Global Delivery

We ensure plates reach you safe, certified, and ready for use:

  •  Seaworthy Packing – Wooden pallets, waterproof wrapping, edge protection.
  •  Air Freight Options – For shutdown-critical projects.
  •  Global Reach – Regular exports to GCC, Africa, Southeast Asia, and Europe.

Buyer benefit: Eliminate risks of damage, rust, or customs rejection.

How to Select the Right SA 387 Gr.11 Cl.2 Plate Supplier in India

Before buying, ask your supplier:

  1.  Do they provide IBR/PED approvals & 3.1/3.2 MTCs?
  2.  Do they maintain ready stock in multiple thicknesses?
  3.  Can they provide cut-to-size and fabrication services?
  4.  Do they have export experience with EPC projects?
  5.  Is their pricing transparent and project-friendly?

At Navgraha Steels INC, we answer “yes” to all — making us a consulting partner, not just a vendor.

FAQs

Cl.2 has higher mechanical strength and heat resistance than Cl.1, making it suitable for more demanding applications.

It contains Cr 1.00–1.50% and Mo 0.45–0.65%, which give it creep resistance and oxidation resistance.

Price varies by thickness, size, and mill origin. Contact us for a transparent quote.

Yes, we supply IBR-certified plates for boiler and pressure vessel use in India.

Yes, we provide EN 10204 3.1/3.2 MTCs, PED approvals, and third-party inspection certificates.

Request SA 387 Gr.11 Cl.2 Plates Price, Datasheet & Mill Test Certificate Today

Don’t let uncertified material or delayed shipments put your project at risk.
Call our Mumbai office today for immediate support.
Request a quote with datasheet & sample MTCs within hours.
Get export-ready documentation for GCC, Africa & EU projects.

With Navgraha Steels INC, you buy more than steel — you buy peace of mind.

Contact Our Team Today