ASME SA387 Alloy Steel Plates Manufacturers, Suppliers & Exporters
ASME SA387 alloy steel plates are chromium molybdenum pressure vessel steel plates for boilers, refineries, petrochemical facilities and heat exchangers operating at high temperatures. These alloy steel pressure vessel plates offer good corrosion resistance, strong tensile strength and superb heat resistance. We have stock availability of ASME SA 387 Grade 11 and Grade 22 Class 2 and Grade 91 Steel plates.
Introduction to ASME SA387 Alloy Steel Plates
We are one of the reputed providers and exporters of ASME SA387 alloy steel plates used in critical high temperature and pressure applications. These plates are made of superior chromium-molybdenum alloy steel to give excellent resistance to oxidation, corrosion and thermal stress.
ASME SA387 plates are used extensively in the oil & gas, petrochemical, power generating, fertilizer plants and pressure vessel manufacturing sectors. With their outstanding mechanical qualities and extended service life, they are suited for fabricators and EPC contractors across the world.
Our inventory includes:
- ASME SA 387 Grade 11 Alloy Steel Plate
- ASME SA 387 Grade 22 Class 2 Plates
- ASME SA387 Grade 91 Steel Plate
- Alloy Steel Pressure Vessel Plate
- Chrome Moly Steel Plates
We supply plates in multiple thicknesses, dimensions, and custom specifications according to ASME, ASTM, and international standards.

Types of ASME SA387 Alloy Steel Plates
ASME SA 387 Grade 11 Alloy Steel Plate
ASME SA 387 Grade 11 alloy steel plates have chromium and molybdenum added to improve heat resistance and corrosion prevention. These plates are extensively utilized for pressure vessels, heat exchangers and boilers working at high temperatures.
Features
- Excellent high-temperature strength
- Good corrosion resistance
- Superior weldability
- Long service life
Applications
- Refineries
- Chemical processing plants
- Thermal power plants
- Pressure vessels
ASME SA 387 Grade 22 Class 2 Plates
Plates from ASME SA 387 Grade 22 Class 2 are often used to make pressure vessels that need to have better tensile strength and creep resistance. These plates work really well in places where sour gas and hydrogen are used.
Benefits
- High creep resistance
- Enhanced oxidation resistance
- Excellent durability
- Suitable for high-pressure systems
We are recognized among leading SA 387 Gr 22 plate suppliers in Texas and global industrial markets.
ASME SA387 Grade 91 Steel Plate
ASME SA387 Grade 91 steel plate is designed for extreme temperature and pressure environments. Grade 91 offers excellent creep strength and is commonly used in modern power generation plants.
Key Properties
- Outstanding tensile strength
- Excellent thermal fatigue resistance
- High corrosion resistance
- Ideal for elevated temperature service
Common Uses
- Power plants
- Superheaters
- Steam piping systems
- Heat recovery systems
We are trusted suppliers of ASME SA387 Gr 91 alloy steel plates for domestic and international industrial projects.
Applications of Alloy Steel Pressure Vessel Plate
Our alloy steel pressure vessel plate products are extensively used in:
- Oil & Gas Industry
- Petrochemical Plants
- Pressure Vessel Manufacturing
- Boilers & Heat Exchangers
- Offshore Platforms
- Power Generation Plants
- Chemical Processing Industry
- Fertilizer Plants
These plates are preferred for high-pressure and high-temperature service due to their superior structural integrity.


Schedule and Size Chart of ASTM A387 Alloy Sheets
| Thickness (mm) | Width (mm) | Length (mm) |
| 6 | 1000-3000 | 2000-12000 |
| 8 | 1000-3000 | 2000-12000 |
| 10 | 1000-3000 | 2000-12000 |
| 12 | 1000-3000 | 2000-12000 |
| 16 | 1000-3000 | 2000-12000 |
| 20 | 1000-3000 | 2000-12000 |
| 25 | 1000-3000 | 2000-12000 |
| 32 | 1000-3000 | 2000-12000 |
| 40 | 1000-3000 | 2000-12000 |
Mechanical Properties of ASME SA387 Alloy Steel Sheets
| Grade | Tensile Strength | Yield Strength |
| Grade 11 | 415 – 585 MPa | 240 MPa |
| Grade 22 | 515 – 690 MPa | 310 MPa |
| Grade 91 | 585 – 760 MPa | 415 MPa |
Specifications Chart of ASME SA387 Grade 91 Steel Plate
| Specification | Details |
| Standard | ASME SA387 / ASTM A387 |
| Width | 1000 mm – 3500 mm |
| Thickness | 5 mm – 150 mm |
| Length | Up to 12 meters |
| Form | Plate, Sheet, Coil |
| Surface Finish | Hot Rolled |
Chemical Composition of ASME SA387 Alloy Steel Plates
| Grade | Chromium (%) | Molybdenum (%) |
| Grade 11 | 1.00 – 1.50 | 0.45 – 0.65 |
| Grade 22 | 2.00 – 2.50 | 0.90 – 1.10 |
| Grade 91 | 8.00 – 9.50 | 0.85 – 1.05 |
Physical Properties Chart of ASME SA 387 Grade 11 Alloy Steel Plate
| Property | Value |
| Density | 7.85 g/cm³ |
| Melting Point | 1370-1400 °C |
| Thermal Conductivity | 37.7 W/m-K at 100°C |
| Specific Heat | 0.46 J/g-°C |
| Modulus of Elasticity | 210 GPa |
| Electrical Resistivity | 0.8 µΩ-m at 20°C |
Why Choose Us for ASME SA387 Alloy Steel Plates?
We focus on delivering high-quality plates that meet global industrial standards and project requirements.
Our Advantages
- Ready stock of ASME SA387 plates
- Custom cutting and processing
- Third-party inspection available
- Worldwide export capability
- Competitive pricing
- Fast delivery schedules
- Mill test certificates provided
As experienced ASME SA387 alloy steel plates manufacturers in USA and global supply partners, we ensure reliable quality and timely service.
Related Alloy Plates/Sheet/Coils Grades
- Alloy 20 Plates
- Alloy 330 Plates
- ASME SA387 Grade 5 Class 1 Plates
- ASME SA387 Grade 5 Class 2 Plates
- ASME SA387 Grade 9 Class 1 Plates
- ASME SA387 Grade 9 Class 2 Plates
- ASME SA387 Grade 11 Class 1 Plates
- ASME SA387 Grade 11 Class 2 Plates
- ASME SA387 Grade 12 Class 1 Plates
- ASME SA387 Grade 12 Class 2 Plates
- ASME SA387 Grade 91 Class 1 Plates
- ASME SA387 Grade 91 Class 2 Plates
Looking for ASME SA387 Alloy Steel Plates?
We supply high-quality ASME SA387 Grade 11, Grade 22 Class 2, and Grade 91 alloy steel plates for industrial applications worldwide. Contact us today for pricing, stock availability, technical support, and customized requirements.
Global Reach
ASC LLP boasts a robust global presence, committed to delivering unparalleled service and quality to clients around the world. Our dedication to prompt delivery and exceptional customer care sets us apart in the industry. Major corporations across the USA, Europe, Asia, and other regions place their trust in our high-quality ASME SA387 Alloy Steel Plates. This widespread trust underscores our reputation for reliability and excellence. By consistently meeting and exceeding the expectations of our international clientele, we continue to solidify our position as a leader in the global steel market.

Countries We Export To
UNITED STATES, EUROPE, UK, UAE, SAUDI ARABIA, OMAN, KUWAIT, JORDAN, QATAR, INDONESIA, MALAYSIA, BRAZIL, SPAIN, ITALY, FRANCE, GERMANY, BAHRAIN, SRI LANKA, AZERBAIJAN, AUSTRALIA, AUSTRIA, PHILIPPINES, TURKEY, RUSSIA, IRAN, IRAQ, CANADA, KOREA, JAPAN, YEMEN, FINLAND, ZIMBABWE, HUNGARY, PORTUGAL, VIETNAM, MOROCCO, THAILAND, SOUTH AFRICA, MEXICO, SINGAPORE, GREECE, KUWAIT, POLAND, NEW ZEALAND, SWEDEN, SWITZERLAND, BELGIUM, BHUTAN, BANGLADESH, TAIWAN, ROMANIA, CAMBODIA, KAZAKHSTAN, AFGHANISTAN.

