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 580 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 622-515B, EN 10CrMo910, DIN 10CrMo910 |
| Typical Tensile Strength | 415–580 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 Iran, 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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What is A387 material?
The ASTM A387 specification is the Standard Specification for Pressure Vessel Plates, Alloy Steel, Chromium-Molybdenum plates used in the application of welded boilers and pressure vessels subjected to elevated temperatures. The two grades SSAB produces are available as Class 1 and/or Class 2.
What is a A387 steel equivalent to?
Other designations that are equivalent to AISI A387 grade 22-PVQ alloy steel include the following: ASTM A182 (F22-1) ASTM A199 (T22)
What is A387 grade 22 material?
ASTM A387 Grade 22 (ASME SA387 Grade 22) is Chrom-Moly steel plate used for making boilers and pressure vessles designed for high temperature high pressure serivce, chrome content at 2.00% to 2.50%, and Moly 0.90% to 1.10% for SA387 GRADE 22 material.
What is the chemical composition of ASTM A387 Grade 12?
ASTM A387 GR 12 CL 2 Plates is designed with chemical components such as silicon, chromium, vanadium, molybdenum, sulfur, phosphorus, carbon, and manganese. Alloy Gr 12 has some tensile requirements, such as tensile strength, area reduction, elongation, and yield strength.
What is the difference between ASTM A182 and A387?
Both ASTM A182 grade F11 class 2 and ASTM A387 grade 22 steel are iron alloys. They have a very high 99% of their average alloy composition in common. There are 32 material properties with values for both materials. Properties with values for just one material (1, in this case) are not shown.