ASTM A387 Grade 11 Class 1 steel plates are high-performance chromium-molybdenum alloy steel plates, designed primarily for welded boilers, pressure vessels, and high-temperature industrial applications.
ASTM A387 Grade 11 Class 1 steel plates
These plates are widely used in petrochemical, power generation, and chemical industries due to their superior high-temperature strength, corrosion resistance, and durability.
Key Features of ASTM A387 Grade 11 Class 1 Steel Plates
- High tensile strength: Typical tensile strength ranges from 415 to 585 MPa
- Excellent corrosion resistance: Chromium alloy provides resistance to oxidation, pitting, crevice corrosion, and stress corrosion cracking, ideal for sour gas applications
- Durable and strong: Withstands heavy loads, high-pressure, and elevated temperature service
- Good dimensional accuracy and surface finish: Suitable for precision applications in pressure vessels and boilers
- Weldable and formable: Supports common welding methods, cutting, grinding, milling, and other fabrication processes
- Long service life: Resistant to wear, thermal cycling, and stress, ensuring extended operational reliability
ASTM A387 Grade 11 Class 1 Steel Plate Specification
| Parameter | Specification |
|---|---|
| Standard | ASTM A387 |
| Grade | Grade 11 Class 1 |
| Thickness | 3.0 mm – 150 mm |
| Shapes | Coils, Sheets, Plates |
| Finish | Hot Rolled (HR), Cold Rolled (CR) |
| Processing | Cutting, Drilling, Welding, Grinding, Milling, Testing |
| Equivalent Grades | BS 1501‑2 620B,13CrMo4‑5 |
| Typical Tensile Strength | 415–585 MPa |
| Heat Treatment | Normalized and Tempered |
Applications of ASTM A387 Grade 11 Class 1 Plates
ASTM A387 Grade 11 Class 1 alloy steel plates are used across a wide range of industrial applications, including:
- Welded Boilers: High-pressure steam and hot water boilers
- Pressure Vessels: Petrochemical and chemical storage vessels
- Sour Gas Service: Equipment exposed to corrosion-prone environments
- Power Plants: Components for high-temperature, high-pressure systems
- Custom Industrial Components: Shim sheets, perforated plates, and specialty profiles
Quality Assurance and Inspection
At Gnee Steel, every batch of ASTM A387 Grade 11 Class 1 plates undergoes strict third-party inspection to ensure mechanical properties, chemical composition, and surface quality meet international standards.
- Third-party certification ensures compliance with ASTM standards
- Thorough testing of raw materials, production processes, and final products
- Buyers are guaranteed high-quality steel plates delivered on time
Gnee Steel has over ten years of experience supplying ASTM A387 Grade 11 Class 1 steel plates globally. We offer:
- Competitive pricing with premium quality
- Reliable global delivery to over 45 countries including Saudi Arabia, UAE, Singapore, Malaysia
- Technical support for fabrication and installation
- Customized processing: cutting, welding, drilling, or surface treatment
Get your quote today for high-quality ASTM A387 Grade 11 Class 1 steel plates and ensure your pressure vessels and boilers meet the highest industry standards.
Contact GneeSteel now with your required thickness, width, length, and quantity, and we will provide a fast, competitive quotation with full technical support.
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