SA387GR11 Steel Plate | ASME SA387 Grade 11 Class 1 & Class 2

SA387GR11 Steel Plate | ASME SA387 Grade 11 Class 1 & Class 2 Supplier – Gangsteel

Gangsteel is a professional manufacturer and exporter of SA387GR11 Steel Plate (ASME SA387 Grade 11). With more than 15 years of experience in 1.25Cr-0.5Mo alloy steels, we supply both Class 1 and Class 2 SA387 Gr11 plates to power plants, refineries, and pressure vessel fabricators worldwide. SA387GR11 is one of the most widely used Cr-Mo grades due to its excellent balance of high-temperature strength, weldability, and cost-effectiveness.

What Is SA387GR11 Steel Plate?

SA387GR11 is a 1.25% chromium and 0.5% molybdenum alloy steel plate designed for elevated temperature service. It offers good creep resistance and oxidation resistance at temperatures up to 540°C. This grade is widely chosen when higher strength than carbon steel is required, but the higher cost of SA387GR22 is not necessary.

Chemical Composition (Heat Analysis, %)

Gangsteel produces SA387GR11 strictly according to ASME SA387 specifications. Full chemical analysis reports are provided with every shipment.

Mechanical Properties

Class 1 (Normalized + Tempered)

• Tensile Strength: 415 – 585 MPa
• Yield Strength: ≥ 205 MPa
• Elongation in 50 mm: ≥ 22%

Class 2 (Normalized + Tempered)

• Tensile Strength: 515 – 690 MPa
• Yield Strength: ≥ 310 MPa
• Elongation in 50 mm: ≥ 22%

Equivalent Material Table

Main Applications

SA387GR11 Steel Plate is commonly used in the following equipment:

• Power plant boilers and steam drums
• Refinery pressure vessels
• Medium-temperature heat exchangers
• Industrial boilers and superheaters
• Petrochemical processing equipment

Why Choose Gangsteel SA387GR11?

• Direct mill production with full EN 10204 3.1 / 3.2 certification
• 100% ultrasonic testing (UT) performed on every plate
• Available in both Class 1 and Class 2 heat treatment conditions
• Thickness range from 6 mm to 150 mm with regular stock availability
• Competitive pricing and reliable delivery schedule (7–30 days)
• Professional technical support for material selection and welding procedures

Real Supply Experience

In 2025, Gangsteel supplied more than 1,100 tons of SA387GR11 plates to a large power plant project in Southeast Asia. The material was used for boiler drums and headers operating at 460°C. All plates passed third-party inspection, and the customer highlighted the consistent mechanical properties and excellent weldability during fabrication.

Request a Quote

If you need SA387GR11 steel plates in specific thickness, width, length, or require Class 1 or Class 2 condition, contact Gangsteel today. We will provide a formal quotation with complete mill test certificates and technical data within 24 hours.

Keywords:SA387GR11 Steel Plate, ASME SA387 Grade 11, 1.25Cr-0.5Mo Alloy Steel Plate