ASTM A387 Grade 11 Alloy Steel Sheet & Plate Manufacturer, Supplier & Exporter in India
ASTM A387 Grade 11 Alloy Steel Sheets & Plates supplied by Astromet Steel & Engineering are chromium-molybdenum alloy steels developed for pressure vessels operating at elevated temperatures. These plates offer excellent resistance to hydrogen attack and oxidation, ensuring long-term service reliability.
Grade 11 Plates deliver superior strength, thermal stability, and toughness under continuous heat exposure. Their controlled alloy composition enhances creep resistance while maintaining good weldability for fabrication-intensive applications.
These alloy steel plates are commonly supplied in normalized and tempered condition, which improves mechanical strength and impact resistance. They perform consistently in harsh industrial environments involving pressure and temperature variations.
Manufactured strictly as per ASTM A387 / ASME SA387 standards, ASTM A387 Gr.11 Plates from Astromet Steel & Engineering undergo stringent quality inspections to meet international pressure vessel requirements.
ASTM A387 Grade 11 Alloy Steel Sheet & Plate Specifications
| Specifications | : | ASTM A387 / ASME SA387 |
| Thickness | : | 1mm-300mm |
| Width |
: | 1000mm, 1219mm, 1500mm, 1800mm, 2000mm, 2500mm, 3000mm, 3500mm, 4050mm etc |
| Length | : | 2000mm, 2440mm, 3000mm, 5800mm, 6000mm, 12000mm, 15000mm etc |
| Surface | : | 2B, 2D, BA, NO.1, NO.4, NO.8, 8K, mirror, checkered, embossed, hair line, sand blast, Brush, etching, etc |
| Finish | : | Hot rolled plate (HR), Cold rolled sheet (CR) |
| Form | : | Coils, Foils, Rolls, Plain Sheet, Shim Sheet, Strip etc. |
ASTM A387 Grade 11 Alloy Steel Sheet & Plate Equivalent Grades
| COUNTRY | USA | EUROPEAN | GERMANY | ENGLAND | FRANCE | RUSSIA |
| STANDARDS | ASTM | EN 10028 | DIN | BS | AFNOR 36206 | GOST |
| Grade 5 | A387 | X12CrMo5 | – | – | – | 15KH5M |
ASTM A387 Grade 11 Alloy Steel Sheet & Plate Chemical Composition
| Class | Tensile (MPa) | Yield (MPa) | Elong. (50mm) | Elong. (200mm) | Reduc’n of Area* |
| Class 1 | 415 – 585 | 205 min | 18% min | – | 40% min |
| Class 2 | 515 – 690 | 310 min | 18% min | – | 40% min |
ASTM A387 Grade 11 Alloy Steel Sheet & Plate Mechanical Properties
| Grade | C | Mn | P | S | Si | Cr | Mo |
| A387 Gr.5 | 0.05-0.21 | 0.55-0.80 | 0.025 | 0.025 | 0.15-0.40 | 0.50-0.80 | 0.45-0.60 |
Why Choose Astromet Steel & Engineering?
Astromet Steel & Engineering ensures consistent quality, certified material traceability, custom cutting services, and timely delivery. We supply ASTM A387 Gr.11 plates with complete test documentation, making us a trusted supplier for critical industrial applications.
ASTM A387 Gr. 11 Plate Usage & Applications
ASTM A387 Gr.11 Alloy Steel Sheets & Plates are widely used in pressure vessels, boilers, heat exchangers, storage tanks, petrochemical reactors, and refinery equipment. They are especially suitable for moderate to high-temperature services in oil & gas, power generation, and chemical processing industries.