naresh@diamondalloysinc.com - GST NO. : 27AQCPC2714K1Z4
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500 Kilogram (MOQ)
| Business Type | Manufacturer, Exporter, Supplier, Retailer, Trader, Distributor, Importer |
| Type | Plates |
| Material | 9Cr-1Mo-V Alloy Steel |
| Usage | Elevated Temperature And High-pressure Applications |
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Product Details
ASME SA 387 Grade 91 Class 1 / Class 2 Plates are advanced 9Cr-1Mo-V (chromium-molybdenum-vanadium) alloy steel plates, engineered for elevated temperature and high-pressure applications. These plates are widely used in thermal power plants, nuclear plants, heat recovery steam generators, pressure vessels, and boilers.
Grade 91 is known for its exceptional creep strength, thermal stability, and oxidation resistance, even at temperatures exceeding 600°C. Class 2 offers higher mechanical strength than Class 1, suitable for highly demanding service conditions.
Key Features-
Exceptional creep and stress rupture resistance
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Outstanding oxidation and corrosion resistance at high temperatures
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High mechanical strength and thermal stability
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Improved microstructure with tempered martensitic properties
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Supplied in normalized, tempered, and tempered-martensitic condition
| Grade | Grade 91 |
| Class | Class 1 and Class 2 |
| Delivery Condition | Normalized and Tempered (Tempered Martensitic) |
| Thickness | 6 mm – 100 mm |
| Width | Up to 3000 mm |
| Length | Up to 12000 mm |
| Surface Finish | Mill Finish / Shot Blasted / Painted |
| Tensile Strength | 585 – 760 MPa | 620 – 795 MPa |
| Yield Strength | ≥ 415 MPa | ≥ 450 MPa |
| Elongation | ≥ 18% | ≥ 18% |
| Impact Toughness | As per ASME Requirement | As per ASME Requirement |
| 0.08–0.12 | 0.30–0.60 | 0.20–0.50 | ≤0.02 | ≤0.01 | 8.0–9.5 | 0.85–1.05 | 0.18–0.25 | 0.06–0.10 | 0.030–0.070 |
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Ultrasonic Testing – ASTM A578 / EN 10160
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Charpy Impact Testing – at -20°C or lower on request
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Hardness Testing – Controlled for creep service
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Creep Rupture & Tensile Testing
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Third-party Inspection – TUV, Lloyd 's, DNV, SGS (if required)
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Supercritical and ultra-supercritical boiler components
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High-pressure steam piping systems
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Heat recovery steam generators (HRSG)
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Power plant pressure vessels and headers
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Thermal and nuclear power projects
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Mill Test Certificate – EN 10204 3.1 / 3.2
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Chemical and Mechanical Testing Reports
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Impact, Hardness & UT Test Reports
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Creep data and microstructure evaluation (on request)
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Third-party inspection documentation (if required)
