Product Range & Introduction:
ASTM A387 Steel Plate is a high-quality alloy steel plate designed to provide superior resistance to elevated temperatures and pressure. It is widely used in the manufacture of boilers, pressure vessels, heat exchangers, and power plants. Supplied mainly in Grades 11, 12, 22, 91, this plate meets stringent standards for toughness, weldability, and corrosion resistance.
GNEE is a trusted Chinese exporter with large inventory and customized processing services, catering to global buyers in the Middle East, Southeast Asia, Africa, Europe, and the Americas.t pressure conditions. All grades are supplied in as-rolled, normalized, or stress-relieved condition upon request.
Available Grades & Specifications
| Grade | Description | Common Use |
|---|---|---|
| Grade 11 | Chromium-Molybdenum alloy steel | Boilers, pressure vessels |
| Grade 12 | Chromium-Molybdenum alloy with improved properties | High-temp equipment |
| Grade 22 | Higher chromium content, better corrosion resistance | Power plants, chemical tanks |
| Grade 91 | Advanced creep-resistant steel for ultra-high temp | Heat exchangers, nuclear reactors |
Chemical Composition
| Element | Grade 11 (%) | Grade 12 (%) | Grade 22 (%) | Grade 91 (%) |
|---|---|---|---|---|
| Carbon (C) | 0.05-0.15 | 0.05-0.15 | 0.07-0.15 | 0.08-0.12 |
| Chromium (Cr) | 0.90-1.20 | 0.90-1.20 | 1.90-2.60 | 8.00-9.50 |
| Molybdenum (Mo) | 0.44-0.65 | 0.44-0.65 | 0.87-1.10 | 0.85-1.05 |
| Nickel (Ni) | 0.40 max | 0.40 max | 0.40 max | 0.40 max |
| Manganese (Mn) | 0.30-0.60 | 0.30-0.60 | 0.30-0.60 | 0.30-0.60 |
Mechanical Properties
| Grade | Yield Strength (MPa) | Tensile Strength (MPa) | Elongation (%) | Impact Energy (J) |
|---|---|---|---|---|
| Grade 11 | ≥275 | 415-565 | ≥22 | ≥27 |
| Grade 12 | ≥275 | 415-565 | ≥22 | ≥27 |
| Grade 22 | ≥275 | 415-565 | ≥22 | ≥27 |
| Grade 91 | ≥415 | 585-735 | ≥20 | ≥27 |
Dimensions & Tolerances
Thickness: 6 mm to 150 mm
Width: up to 3000 mm
Length: up to 12000 mm
Tolerances: ASTM A20 standard
Surface: Hot rolled with mill or shot-blasted finish
Edges: Mill edge or sheared
Custom sizes and cutting service available.
Applications
High-temperature boilers and pressure vessels
Power plants and thermal stations
Petrochemical industry reactors and tanks
Heat exchangers and nuclear reactors
Chemical processing equipment
Why Choose GNEE for ASTM A387 Plates?
Annual inventory exceeds 1 million tons, ensuring quick delivery
Certified steel plates meeting ASTM and international standards
Advanced processing: cutting, beveling, drilling available
Global logistics with export hubs in Tianjin, Shanghai, Qingdao
Trusted by customers across Asia, Africa, Middle East, Europe, and Americas
Packaging & Shipping
- Bundled with steel strips
- Waterproof wrapping & edge protection
- Wooden pallets or as per buyer request
- Shipping by container or bulk vessel
If you want to learn more about GNEE's products, you can send an email to alloy@gneesteelgroup.com. We are more than happy to assist you.
What is ASTM 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 the ASTM A387 equivalent to?
Among the ASTM A387 Grade 22 equivalent steel grades, SA387 Grade 22, 10CrMo9-10 is more popular than other equivalents. SA387 Grade 22 steel is under ASME SA387/ SA387M standard. The chemical performance and technical requirements of SA387 Grade 22 steel is almost same with ASTM A387 Grade 22 steel.
What is SA 387 Grade 11 Class 2 equivalent to?
The Sa 387 Gr 11 Cl 2 Equivalent Material is the SA387-11-2 of the ASME and ASTM standard. With similar chromium, molybdenum, and chemical content the, Sa 387 Gr 11 Cl 1 Equivalent Material of the BS 621B exhibits identical properties.
What is the chemical composition of ASTM A387 Grade 22?
ASTM A387 GR 22 CL 2 Plates is designed with chemical compositions like carbon, manganese, phosphorus, molybdenum, chromium, silicon, and sulfur. This A387 alloy is constructed with various classifications like area reduction, elongation, yield strength, and high tensile strength.
What is A387 Grade 9 material?
chrome-molybdenum plate
A387 Grade 9 Class 2 chrome-molybdenum plate is an ideal material for welded pressure vessels and boilers used in elevated temperature service. With excellent resistance to high temperature and corrosion, this type of steel is commonly used in the petrochemical, oil, gas and power generation industry.
What is A387 Grade 11 material?
ASTM A387 Gade 11
The ASTM A387 specification is the Standard Specification for Pressure Vessel Plates, Alloy Steel, Chromium-Molybdenum intended primarily for use in welded boilers and pressure vessels designed for elevated temperature service.
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