SA387GR5 Steel Plate|ASME SA387 Grade 5 Class 1 & Class 2 Sup

SA387GR5 Steel Plate | ASME SA387 Grade 5 Class 1 & Class 2 Supplier – Gangsteel

Gangsteel is a professional manufacturer and exporter of SA387GR5 Steel Plate (ASME SA387 Grade 5). With more than 15 years of experience in 5Cr-0.5Mo alloy steels, we supply both Class 1 and Class 2 SA387 Gr5 plates to power plants, refineries, and high-temperature pressure vessel projects worldwide. SA387GR5 is known for its excellent resistance to hydrogen attack and good high-temperature performance.

What Is SA387GR5 Steel Plate?

SA387GR5 is a 5% chromium and 0.5% molybdenum alloy steel plate designed for elevated temperature service in corrosive environments. It offers superior resistance to hydrogen attack and good creep resistance at temperatures up to 650°C. This grade is widely used in applications where higher chromium content is needed for better corrosion and oxidation resistance compared to SA387GR11 or SA387GR12.

Chemical Composition (Heat Analysis, %)

Gangsteel produces SA387GR5 strictly according to ASME SA387 specifications. Full chemical analysis reports are provided with every shipment.

Element	Content (%)
Carbon (C)	0.15 max
Manganese (Mn)	0.30 – 0.60
Phosphorus (P)	≤ 0.035
Sulfur (S)	≤ 0.030
Silicon (Si)	0.50 max
Chromium (Cr)	4.00 – 6.00
Molybdenum (Mo)	0.45 – 0.65

Mechanical Properties

Class 1 (Normalized + Tempered)

• Tensile Strength: 415 – 585 MPa
• Yield Strength: ≥ 205 MPa
• Elongation in 50 mm: ≥ 18%

Class 2 (Normalized + Tempered)

• Tensile Strength: 515 – 690 MPa
• Yield Strength: ≥ 310 MPa
• Elongation in 50 mm: ≥ 18%

 

Equivalent Material Table

Standard	Grade / Designation	Equivalent Material
ASME / ASTM	SA387 Gr5 / A387 Gr5	–
UNS	K41545	–
EN / DIN	12CrMo19-5 / 1.7362	–
JIS	SCMV3	–
GB	12Cr5MoR	–

Main Applications

SA387GR5 Steel Plate is commonly used in the following equipment:

• Hydrotreating and hydrocracking reactors
• High-temperature hydrogen service vessels
• Refinery pressure vessels
• Power plant superheaters and reheaters
• Chemical processing equipment exposed to hydrogen at elevated temperatures

 

Why Choose Gangsteel SA387GR5?

• 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 580 tons of SA387GR5 plates to a major hydrocracking unit project in the Middle East. The material was used for critical reactor vessels operating in high-temperature hydrogen service. All plates passed stringent third-party inspection, and the customer praised the excellent resistance to hydrogen attack and consistent mechanical properties.

Request a Quote

If you need SA387GR5 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:SA387GR5 Steel Plate, ASME SA387 Grade 5, 5Cr-0.5Mo Alloy Steel Plate