SA387 Chrome Moly Alloy Steel Sheets

ASME SA387 Chrome-Moly Plates are the first choice for heat exchangers and pressure vessels. Global shipping available. Stock in grades 11, 12, 22, and 91.

High Temperature Resistance
Designed for use in pressure vessels and boilers operating at elevated temperatures.
Chrome-Moly Alloy Composition
Contains Chromium and Molybdenum for enhanced strength, heat resistance, and corrosion resistance.
Available in Multiple Grades
Supplied in Grade5, 11, 12, 22, and 91 (Class 1 and Class 2), per ASME/ASTM specifications.

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ASME SA387 / ASTM A387 pressure vessel steel description

SA387 Alloy Steel Plate is a chromium-molybdenum steel designed for high-temperature and pressure service. It is widely used in pressure vessels, boilers, and heat exchangers across oil, gas, and power industries. Available in Grades 11, 12, 22, and 91 (Class 1 & 2), SA387 offers excellent weldability, thermal stability, and resistance to corrosion. All plates are supplied with EN 10204 3.1/3.2 MTC and optional NACE, HIC, or UT testing. With global export experience, competitive pricing, and fast delivery, we are your trusted supplier for SA387 Chrome Moly plates from China.

ASME SA387 / ASTM A387 pressure vessel steel Data Sheet

ASME SA387 Chemical Composition
Grade	C	Mn	P	S	Si	Cr	Mo	Ni
Grade 5	≤0.15	0.25-0.66	0.025	0.025	≤0.55	3.90-6.10	0.40-0.70
Grade 9	≤0.15	0.25-0.66	0.025	0.025	≤1.05	7.90-10.10	0.85-1.15
Grade 11	0.04-0.17	0.35-0.73	0.025	0.025	0.44-0.86	0.94-1.56	0.40-0.70
Grade 12	0.04-0.17	0.35-0.73	0.025	0.025	0.13-0.45	0.74-1.21	0.40-0.65
Grade 22	0.04-0.15	0.25-0.66	0.025	0.025	≤0.50	1.88-2.62	0.85-1.15
Grade 22L	≤0.12	0.25-0.66	0.025	0.025	≤0.50	1.88-2.62	0.85-1.15
Grade 91	0.06-0.15	0.25-0.66	0.025	0.012	0.18-0.56	7.90-9.60	0.80-1.10	0.30-0.60

ASME SA387 Mechanical Properties
Grade	Class	Tensile Strength(Mpa) min.	Yield Strength(MPa) min.	Elongation in 2 inches(%) max.
SA 387 Grade 5	Class 1	415-585	205	18
SA 387 Grade 5	Class 2	515-690	310	18
SA 387 Grade 9	Class 1	415-585	205	18
SA 387 Grade 9	Class 2	515-690	310	18
SA 387 Grade 11	Class 1	415-585	240	22
SA 387 Grade 11	Class 2	485-620	310	22
SA 387 Grade 12	Class 1	380-550	230	22
SA 387 Grade 12	Class 2	450-585	275	22
SA 387 Grade 22	Class 1	415-585	205	18
SA 387 Grade 22	Class 2	515-690	310	18

Products Categories

Pressure Vessel Steel

Pipeline Steel

Pipe Fittings Steel

Stainless Steel

Galvanized Steel

High-strength Structural Steel

Quality Carbon Structural Steel

Offshore and Marine Structural Steel

Nuclear Power Steel

Corten Steel&Weathering Steel

Wind Turbine Tower Steel

Nickel-Based Low Temperature Structural Steel

Wear-Resistant Steel

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ASME SA387 / ASTM A387 pressure vessel steel Application

SA387 alloy steel plates are widely used in high-temperature and high-pressure environments. They are ideal for manufacturing pressure vessels, boilers, heat exchangers, and reactors.

Typical applications include:

Oil & Gas Refining Equipment
Petrochemical Processing Plants
Power Generation Boilers & Steam Drums
Chemical Storage Tanks
Heat Exchangers and Pressure Vessels
Hydrogen Reactors and Cracking Units

Thanks to its excellent thermal resistance and mechanical strength, SA387 plate is a trusted material for demanding industrial projects in energy, chemical, and offshore sectors.

ASME SA387 / ASTM A387 pressure vessel steel plate production process

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PVQ ASME SA387 / ASTM A387 FAQs

What is SA387 steel plate used for?

SA387 steel plate is a chromium-molybdenum alloy pressure vessel steel designed for high-temperature and high-pressure service. It is widely used in boilers, heat exchangers, petroleum, chemical, and power generation industries. Thanks to its excellent oxidation resistance and mechanical strength at elevated temperatures, SA387 plate is a popular choice for industrial boilers and pressure vessels.

What are the main grades of SA387 and their differences?

The two most common grades are SA387 Grade 11 and SA387 Grade 22: SA387 Grade 11 (1.25% Cr, 0.5% Mo): Suitable for moderate temperature resistance applications. SA387 Grade 22 (2.25% Cr, 1% Mo): Provides higher creep resistance, toughness, and durability at elevated temperatures. When comparing SA387 Gr.11 vs SA387 Gr.22, buyers usually select Gr.11 for medium temperature projects and Gr.22 for demanding oil, gas, and power industry applications.

Can Hennes supply SA387 plates with certification and inspection?

Yes. Hennes is a trusted SA387 steel plate supplier and exporter, and we provide: ✅ Full MTC (EN10204 3.1/3.2) test certificates ✅ Third-party inspections such as SGS, BV, Lloyd’s, and TUV ✅ Customized cutting, beveling, and heat treatment according to project requirements This ensures that every SA387 plate you purchase from Hennes meets international standards and your specific project needs.