ASTM A387 Steel Plate Supplier | SA387 Gr11, Gr22, Gr91

ASTM A387 Steel Plate Supplier with Stock and Fast Delivery

CJM Steel is a professional ASTM A387 steel plate supplier providing SA387 Gr11, Gr22, and Gr91 alloy steel plates for pressure vessels, boilers, heat exchangers, and high-temperature industrial applications.

We supply ASTM A387 Cr-Mo steel plates according to ASTM and ASME standards, with stable mill sources, flexible MOQ, customized processing, and export experience for global distributors, EPC contractors, and fabrication companies.

Our ASTM A387 alloy steel plates are available in different grades, thicknesses, and dimensions, with cutting, beveling, drilling, inspection, and mill documentation available according to project requirements.

ASTM A387 Steel Plate Supply Range and Stock Availability

CJM supplies ASTM A387 / ASME SA387 Cr-Mo alloy steel plates in Gr11, Gr22, and Gr91. Standard and project-based supply can be arranged according to grade, thickness, dimensions, quantity, and delivery requirements.

Item	Supply Options
Standard	ASTM A387 / ASME SA387
Steel Type	Chromium-Molybdenum (Cr-Mo) alloy steel plate
Available Grades	Gr11, Gr22, Gr91
Thickness	6–150 mm
Width	Up to 3500 mm
Length	Up to 12000 mm
Heat Treatment	Normalized / Quenched & Tempered
Processing	Cutting, beveling, drilling
Inspection	Third-party inspection available
Certification	Mill Test Certificate, EN 10204 3.1

ASTM A387 plates may be specified by grade and class. If Class 1 or Class 2 is required, the applicable class should be stated with the grade so the required mechanical and testing requirements can be confirmed.

For ASTM A387 steel plate prices, stock availability, and technical specifications, contact CJM Steel with your required grade, size, quantity, and destination.

SA387 Grade 11 Steel Plate Supplier

SA387 Grade 11 steel plate, also specified as ASTM A387 Grade 11 steel plate, is a Cr-Mo alloy steel plate for pressure vessel and elevated-temperature equipment. CJM supplies Grade 11 plates in customized dimensions, with cutting, processing, inspection, and mill documentation available according to project requirements.

Typical uses:

• Boilers
• Refinery equipment
• Heat exchangers

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SA387 Grade 22 Steel Plate Supplier

SA387 Grade 22 steel plate, also specified as ASTM A387 Grade 22 steel plate, is a Cr-Mo alloy steel plate used for pressure vessels and equipment requiring elevated-temperature service. As an SA387 Grade 22 steel plate supplier, CJM supports customized sizes, cutting, processing, inspection, and complete mill documentation for project orders.

For buyers sourcing SA387 Grade 22 steel plate, CJM can support stock or project-based supply according to the required thickness, dimensions, quantity, and delivery schedule.

Typical uses:

• High-pressure vessels
• Petrochemical plants
• Thermal power systems

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SA387 Grade 91 Steel Plate Supplier

SA387 Grade 91 steel plate is a high-alloy Cr-Mo steel plate designed for demanding high-temperature pressure equipment. CJM supplies Grade 91 according to required specifications, with processing, inspection, and mill documentation available for project requirements.

Typical uses:

• Supercritical boilers
• Power generation systems
• Advanced pressure vessels

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

Detailed composition analysis can be provided upon request or technical consultation.

Exact requirements should be confirmed against the applicable ASTM/ASME specification and ordered grade.

Mechanical Properties

Grade	Yield Strength (MPa)	Tensile Strength (MPa)	Elongation (%)
Grade 11	≥275	415-565	≥22
Grade 12	≥275	415-565	≥22
Grade 22	≥275	415-565	≥22
Grade 91	≥415	585-735	≥20

Why Choose Us as Your ASTM A387 Steel Plate Supplier

Choosing the right ASTM A387 steel plate supplier is important for pressure vessel and high-temperature equipment projects.

• Stable supply of ASTM A387 Gr11 and Gr22 steel plates from reliable mill sources
• Fast delivery from available stock for urgent project requirements
• Flexible processing services including cutting, beveling, and custom sizes
• Full documentation support including Mill Test Certificate (EN 10204 3.1)
• Third-party inspection available upon request
• Export experience in pressure vessel steel plates for global markets

We focus on reliable supply and long-term cooperation with global buyers requiring ASTM A387 alloy steel plates.

ASTM A387 Steel Plate Packaging and Shipping

CJM prepares ASTM A387 steel plates according to the shipping method and buyer requirements.

• Bundled with steel strips
• Waterproof wrapping & edge protection
• Wooden pallets or as per buyer request
• Shipping by container or bulk vessel

ASTM A387 vs ASTM A516 Steel Plate Comparison

Item	ASTM A516	ASTM A387
Type	Carbon steel	Alloy steel (Cr-Mo)
Temperature Resistance	Medium	High
Corrosion Resistance	Standard	Enhanced
Cost	Lower	Higher
Typical Use	Storage tanks	Refinery & high-temp vessels

Selection Suggestion:

• Choose A516 for standard pressure vessel applications with cost sensitivity
• Choose A387 plate when high temperature, hydrogen service, or corrosion resistance is required

Not sure the difference between A387 and A516 ? See our detailed selection guidance.

Request a Quote for ASTM A387 Steel Plate

Contact CJM for pricing, stock availability, and technical support.
Send your inquiry with grade (Gr11 / Gr22 / Gr91), size, quantity, and destination to receive a detailed quotation.

FAQ – ASTM A387 Steel Plate Supplier

Q1. What is the difference between ASTM A387 Class 1 and Class 2?

Class 1 and Class 2 specify different requirements within applicable A387 grades. When ordering, the required class should be stated together with the grade so the applicable requirements can be confirmed.

Q2. What grades of ASTM A387 steel plate do you supply?

We supply common ASTM A387 grades including SA387 Grade 11, Grade 22, and Grade 91. Different grades are selected according to temperature requirements, pressure conditions, and application environments.

Q3. Do you have ASTM A387 steel plate in stock?

Yes, we keep ready stock for standard sizes of Gr11 and Gr22. Gr91 is available upon request.

Q4. Can ASTM A387 steel plate be cut or processed?

Yes, we offer cutting, beveling, drilling, and other processing services based on project requirements.

Q5. How can I get an ASTM A387 steel plate quotation?

You can send us your required grade, thickness, size, and quantity. We will provide price and delivery details within 24 hours.

Q6. Is ASTM A387 the same as ASME SA387?

ASTM A387 is the ASTM specification for pressure vessel alloy steel plates, while ASME SA387 is the corresponding ASME material specification used for pressure vessel applications. The applicable specification should be confirmed according to the project or code requirements.

Q: What is your company’s main products/services?

A: We are a professional manufacturer for Carbon Steel, Alloy Steel and Profile products. We have the experience of steel business for more than 10 years and our products are exported to Mid East,South America,Southeast Asia,Africa,South and East Asia etc.

Q: Can I go to your factory for a visit?

A: Of course, we welcome customers from all over the world to visit our factory.

Q: What are your terms of payment?

A: 30% T/T deposite and 70% balance before shipment.

Q: What is your delivery time?

A: For stocks,we could transport the goods to loading port within 7 days after we received the deposit; For production,it usually takes about 15-30 days after receiving the deposit.

Q: Do you provide samples? Are they free or paid?

A: Samples are available for free,but the courier freight will be covered by customer account.

Q: Do you accept the third party inspection?

A:Yes, we fully accept ‌third-party inspections.

Q: Why should I buy from you not from other suppliers?

A: Integrating the superior resources of China’s steel industry, we provide customers with high-quality steel products at preferential prices, and can ensure that the goods are delivered to customers in a timely manner.

Q:How can you guarantee quality?

A: Always a pre-production sample before mass production;Always 100% inspected before shipment