Navgraha Steels INC supplies SA 387 Gr 91 Cl 2 Plates, Sheets & Coils, manufactured by top global mills including Sail, AMNS, JSPL, Evonith, Nippon Yakin, Outokumpu, Special Metals, VDM, and ATI. As the highest strength Chrome-Moly alloy grade under ASTM A387, Gr 91 Class 2 is specially engineered for boilers, reactors, and high-pressure vessels operating under extreme temperature and pressure conditions. Every supply is backed by EN 10204 3.1/3.2 MTCs, IBR/NACE approvals, and global inspection certifications.
When sourcing alloy steel plates for boilers, power plants, or refineries, buyers cannot afford mistakes.
When you’re building bridges, refineries, storage tanks, or machinery, the steel you choose isn’t just a commodity — it’s the foundation of your project’s safety and success.
When you’re sourcing steel coils for fabrication, structures, or tank manufacturing, you cannot afford delays, inconsistent thickness, or missing certifications.
SA 387 Gr 91 Cl 2 is a 9% Chromium – 1% Molybdenum alloy steel with added vanadium and niobium.
It is the premium Chrome-Moly choice where Gr 11 and Gr 22 cannot meet extreme service demands.
reactors, hydrocrackers, hydrogen vessels
superheaters, reheaters, boilers, steam turbines
pressure vessels, high-temperature separators, sour gas equipment
fertilizer reactors, process vessels, heat exchangers
high-pressure, high-temperature piping & vessel plates
heavy-duty, long-life fabrication projects
| Property | Typical Value | Notes |
|---|---|---|
| Tensile Strength | 585–760 MPa | Highest among Chrome-Moly grades |
| Yield Strength | ≥ 415 MPa | Ensures superior safety margins |
| Elongation | 18–20% | Retains ductility for fabrication |
| Impact Test (Cl 2) | 27J at -18°C | High toughness in critical service |
SA 387 Gr 91 Cl 2 offers the best creep resistance and oxidation stability in the Chrome-Moly family.
| Element | Typical Range % | Function |
|---|---|---|
| Carbon (C) | 0.08–0.12 | Provides strength & hardness |
| Chromium (Cr) | 8.0–9.5 | High-temp oxidation resistance |
| Molybdenum (Mo) | 0.85–1.05 | Improves creep resistance |
| Vanadium (V) | 0.18–0.25 | Strengthening element |
| Niobium (Nb) | 0.06–0.10 | Enhances creep strength |
| Manganese (Mn) | 0.30–0.60 | Improves toughness |
| Silicon (Si) | 0.20–0.50 | Oxidation resistance |
| Phosphorus (P) | ≤ 0.020 | Kept low for weldability |
| Sulfur (S) | ≤ 0.010 | Low for crack resistance |
Its 9Cr-1Mo-V-Nb composition ensures decades of performance in extreme refinery and power plant environments.
SA 387 Gr 91 Cl 2 is specified under ASTM A387 / ASME SA387 for chromium-molybdenum-vanadium alloy steel plates.
Global Equivalents:
Available Brands at Navgraha Steels INC:
Sail, AMNS, JSPL, Evonith, Nippon Yakin, Outokumpu, Special Metals, VDM, ATI
Multi-mill sourcing ensures vendor list compliance and reliable availability for EPC buyers.
We supply SA 387 Gr 91 Cl 2 Plates, Sheets & Coils in:
Suitable for fabricators handling large vessels, reactors, and boilers.
Ensures maximum creep resistance, oxidation stability, and long service life.
Navgraha supplies ready-to-fabricate plates with full technical support
A trusted partner for refineries, power plants, and EPC contractors
Multiple supply variants make SA 387 Gr 91 Cl 2 adaptable for global refinery & power plant projects.
Navgraha Steels INC exports SA 387 Gr 91 Cl 2 Plates, Sheets & Coils to some of the most demanding EPC contractors, refineries, and power plants worldwide.
Key Export Markets:
Packing:
Ensures safe, compliant, and fast global delivery.
Choose SA 387 Gr 91 Cl 2 when:
It is the top-tier choice for critical refinery & supercritical power projects.
Every order of SA 387 Gr 91 Cl 2 includes
Buyers receive full traceability, compliance, and EPC-ready approvals
Gr 91 has higher alloying (9Cr-1Mo-V-Nb), offering maximum creep and oxidation resistance.
Continuous service up to 650–700°C.
585–760 MPa.
Minimum 415 MPa.
Yes, along with plates, we supply coils & sheets.
Sail, AMNS, JSPL, Evonith, Nippon Yakin, Outokumpu, Special Metals, VDM, ATI.
Yes, IBR-certified plates are available.
Yes, NACE MR0175/MR0103 certified plates are supplied.
Yes, Class 2 plates are tested at -18°C.
Yes, SGS, BV, TÜV, Lloyd’s, DNV inspections are supported.
Yes, UAE, Saudi, Oman, and Qatar are our key markets.
EN X10CrMoVNb9-1, DIN 10CrMo910, BS 640B.
6 mm to 150 mm, with cut-to-size options.
Prices depend on thickness, size, and certification – request a live quote.
Navgraha Steels INC delivers SA 387 Gr 91 Cl 2 Plates, Sheets & Coils with:
