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
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.
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.
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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