ASME SA387 Grade 12 Class 1 Plates

ASC LLP is a trusted supplier and stockist of ASME SA387 Grade 12 Class 1 Plates, offering high-quality alloy steel plates to global industries. Our plates are known for their excellent performance in high-temperature environments, making them suitable for pressure vessels, boilers, and heat exchangers. With superior strength, durability, and corrosion resistance, these plates are ideal for both moderate and high-temperature applications.

What is ASME SA387 Grade 12 Class 1?

ASME SA387 Grade 12 Class 1 is a chromium-molybdenum alloy steel plate designed for use in pressure vessels and boilers working in elevated temperatures. This material combines the corrosion resistance of chromium with the high strength and heat resistance of molybdenum. It belongs to the family of alloy steels specified under the ASME SA387 and ASTM A387 standards.

These plates are commonly used in industries such as:

  • Petrochemical
  • Power generation
  • Oil & gas
  • Chemical processing
  • Heat exchangers and reactors
ASME SA387 Grade 12 Class 1 Plates

Key Features of ASME SA387 Grade 12 Alloy Steel Plates

  • High-Temperature Resistance: Can withstand temperatures up to 600°C or more without losing strength.
  • Corrosion Resistance: Chromium content offers excellent resistance to oxidation and corrosion.
  • Toughness and Ductility: Provides durability and resistance to cracking under stress.
  • Weldability: These plates can be welded using standard methods without preheating in most cases.
  • Versatility: Suitable for pressure vessels, structural applications, and equipment operating under high thermal conditions.

SA387 Grade 12 Class 1 vs. Class 2

Many customers often compare Class 1 and Class 2 variants of Grade 12. Here’s a quick comparison:

  • Class 1: Offers moderate strength with better ductility and weldability.
  • Class 2 (such as ASTM A387 Grade 12 Class 2 Plate Supplier solutions): Designed for applications requiring higher tensile strength.

Both variants perform well under heat and pressure, and the selection depends on the specific demands of the project.

ASME SA387 Gr12 Class 1 Plates
ASME SA387 Grade 12 Class 1 Alloy Steel Plates

Schedule and Size Chart for ASME SA387 Grade 12 Class 1 Plates

Thickness (mm) Width (mm) Length (mm) Available Form
6 – 12 1000 – 2500 2000 – 12000 Hot Rolled / HR Plates
13 – 50 1250 – 3000 3000 – 12000 HR / Cut to Length
51 – 100 1500 – 3500 3000 – 14000 Custom Mill Rolled
101 – 150 1800 – 3500 4000 – 16000 Custom Heavy Plates

Specifications Chart for EN 10028-2 Plates

Standard Details
Product Name ASME SA387 Grade 12 Class 1 Plates
Equivalent Grades ASTM A387 Gr.12 Cl.1, EN 10028-2 13CrMo4-5
UNS Number K11757
Material Type Alloy Steel (Chromium-Molybdenum)
Plate Class Class 1
Plate Grade Grade 12
Manufacturing Type Hot Rolled / Normalized / Quenched & Tempered
Surface Finish Mill Finish / Shot Blasted / Painted
Testing Standards ASME, ASTM, EN, IBR, NACE
Certification EN 10204 3.1 / 3.2, IBR, PED, ISO, Lloyd’s
Delivery Condition N (Normalized), QT (Quenched and Tempered)

Mechanical Properties of SA387 Grade 12 Steel Plates

Property Class 1
Tensile Strength (MPa) 415 – 585
Yield Strength (MPa) ≥ 240
Elongation (%) ≥ 22
Impact Resistance Good at high temperatures

Chemical Composition of ASME SA 387 GRADE 12 Class 1

Element Content (%)
Carbon (C) ≤ 0.15
Manganese (Mn) 0.40 – 0.65
Phosphorus (P) ≤ 0.025
Sulfur (S) ≤ 0.025
Silicon (Si) 0.50 max
Chromium (Cr) 0.80 – 1.25
Molybdenum (Mo) 0.44 – 0.65

Physical Properties Chart of SA 387 Gr 12 Cl 2 Plate

Property Value
Density 7.85 g/cm³ (7850 kg/m³)
Melting Point ~1425 – 1510 °C
Tensile Strength 415 – 585 MPa
Yield Strength ≥ 240 MPa
Elongation ≥ 22%
Modulus of Elasticity ~200 GPa
Thermal Conductivity 25 – 30 W/m·K (at 20–300 °C range)
Specific Heat Capacity ~460 J/kg·K
Hardness (HB) ≤ 217 HBW (as per standard)
Impact Resistance Good (at elevated temperatures)
Corrosion Resistance Excellent (due to Cr & Mo content)
Weldability Good – Preheat usually not required

Applications of ASME SA387 Grade 12 Plates

These alloy steel plates are widely used in industries that require high heat and pressure resistance:

  • Boiler Components
  • Pressure Vessels
  • Heat Exchangers
  • Oil Refineries
  • Gas Processing Units
  • Chemical Reactors
  • Thermal Power Plants

Because of their resistance to oxidation and strength at high temperatures, they are ideal for manufacturing critical components in the oil & gas and chemical sectors.

Why Choose ASC LLP as Your Supplier?

At ASC LLP, we are known as reliable SA387 Grade 12 Class 1 and SA387 Grade 22 CL. 2 Alloy Steel Plate Suppliers. We provide:

  • Global Shipping
  • Third-Party Inspection Reports
  • Mill Test Certificates
  • Custom Thicknesses and Widths
  • Prompt Delivery
  • Customer Support from Quotation to Dispatch

We also supply EN 10028-2 Plates, which comply with European standards for pressure vessel plates, ensuring a broad range of certifications and global compatibility.

Related Grades and Equivalents

If you’re exploring other alloy steel plate options, ASC LLP also supplies:

  • ASTM A387 Grade 22 Alloy Steel Plates – Higher grade with added strength and temperature resistance.
  • SA 387 Gr 12 Cl 2 Plate – Suitable for more demanding thermal applications.
  • EN 10028-2 Plates – European equivalents to ASME standards.
  • ASME SA387 Steel Plates – Broad category that includes multiple grades for different industrial needs.

Global Reach

Amardeep Steel Centre 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 Grade 12 Class 1 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.

Metal globe

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.

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