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 | 1.25% Chromium - 0.5% Molybdenum Alloy Steel |
| Application | Boiler Fabrication, Pressure Vessels, Heat Exchangers, Refinery And Petrochemical Plant Equipment |
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Product Details
ASME SA 387 Gr. 11 Class 1 and Class 2 Plates are 1.25% Chromium – 0.5% Molybdenum alloy steel plates, specifically developed for use in elevated temperature and pressure applications. These plates are widely used in boiler fabrication, pressure vessels, heat exchangers, and refinery and petrochemical plant equipment.
Both Class 1 and Class 2 offer excellent creep resistance, corrosion resistance, and weldability, with Class 2 providing higher tensile strength.
Key Features-
Excellent oxidation and heat resistance
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Superior mechanical performance at elevated temperatures
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Good weldability and formability
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Available in normalized + tempered condition
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Suitable for refineries, power plants, and chemical process industries
| Grade | Grade 11 |
| Class | Class 1 and Class 2 |
| Alloy Composition | Chromium 1.00–1.50%, Molybdenum 0.44–0.65% |
| Delivery Condition | Normalized and Tempered |
| Thickness | 6 mm – 100 mm |
| Width | Up to 3000 mm |
| Length | Up to 12000 mm |
| Surface Finish | Mill Finish / Shot Blasted / Primer Coated |
| Tensile Strength | 415 – 585 MPa | 515 – 690 MPa |
| Yield Strength | ≥ 205 MPa | ≥ 275 MPa |
| Elongation | ≥ 20% | ≥ 20% |
| Impact Toughness | As per ASME Requirement | As per ASME Requirement |
| 0.20 | 0.60 | 0.50 | 0.025 | 0.025 | 1.00–1.50 | 0.44–0.65 |
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Ultrasonic Testing – As per ASTM A578 or EN 10160
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Charpy V-Notch Impact Testing – on request
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Mechanical Testing – Tensile, Yield, Elongation
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Chemical Composition & Hardness Testing
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Third-party Inspection – TUV, DNV, Lloyd’s, SGS (optional)
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Pressure vessels and heat exchangers
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Steam boilers and superheater components
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Petrochemical processing equipment
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Power generation and refinery equipment
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High-temperature piping and reactors
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Mill Test Certificate – EN 10204 3.1 / 3.2
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UT Reports, Mechanical and Chemical Test Results
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Charpy Impact Test Reports (if required)
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Third-party inspection certificates (on request)
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Full traceability and QA/QC documentation
