SA 387 Grade 12 Class 1 is a chromium-molybdenum alloy steel plate for high-temperature pressure vessels and boilers, offering good corrosion resistance with about 1% Chromium and 0.5% Molybdenum, featuring lower tensile strength (around 380-550 MPa) than Class 2, making it suitable for welded structures in chemical, oil & gas, and power industries needing thermal stability and strength.
Specification
|
Grade |
ASME SA 387 GR.12 CL.1 Alloy Steel Plate |
|---|---|
|
Width |
1000mm-4500mm |
|
Thickness |
5mm-150mm |
|
Length |
3000mm-18000mm |
|
Supply Condition |
As Rolled, Normalized Rolling, Furnace Normalizing, Vacuum Degassing, Simulated Post-Weld Heat Treatment or as per customer requirement. |
|
Impact tested |
52° C |
|
Process of Manufacturing |
Hot-Rolled (HR) |
Chemical Composition
| Element | Chemical Composition (%) | |
| ASME SA387 Grade 12 | ||
| Carbon: | Heat Analysis: | 0.05 - 0.17 |
| Product Analysis: | 0.04 - 0.17 | |
| Manganese: | Heat Analysis: | 0.40 - 0.65 |
| Product Analysis: | 0.35 - 0.73 | |
| Phosphorus: | Heat Analysis: | 0.035 |
| Product Analysis: | 0.035 | |
| Sulphur (max): | Heat Analysis: | 0.035 |
| Product Analysis: | 0.035 | |
| Silicon: | Heat Analysis: | 0.15 - 0.40 |
| Product Analysis: | 0.13 - 0.45 | |
| Chromium: | Heat Analysis: | 0.80 - 1.15 |
| Product Analysis: | 0.74 - 1.21 | |
| Molybdenum: | Heat Analysis: | 0.45 - 0.60 |
| Product Analysis: | 0.40 - 0.65 |
applications：
High-Temperature Service: Designed for environments where sustained high heat is common, thanks to added Chromium (Cr) and Molybdenum (Mo).
Pressure Vessels & Boilers: Ideal for constructing vessels that hold pressurized fluids or gases at elevated temperatures.
Corrosion Resistance: Offers better resistance to oxidation and corrosion compared to standard carbon steels in high-temp settings.
Industries: Widely used in Oil & Gas, Petrochemical, and Power Generation.
Specific Equipment: Fabricates components like heat exchangers, reactors, drums, and other critical equipment.
Advantages:
High-Temperature Service: Engineered to maintain strength and integrity in elevated temperature systems like boilers and pressure vessels.
Corrosion Resistance: Chromium content provides excellent resistance to oxidation, aggressive media, and sour service (H2S) conditions.
Improved Strength: Molybdenum enhances tensile strength, especially at high temperatures, while maintaining good ductility and toughness.
Weldability: The alloy is suitable for welding, a critical feature for fabricating complex equipment.
Versatility: Used across petrochemical, oil & gas, chemical, and power industries for various components.
If you want to learn more about (SA 387 Grade 12 Class 1)GNEE's products, you can send an email to beam@gneesteelgroup.com. We are more than happy to assist you.
1.Is SA 387 carbon steel?
Weldable carbon steel plates for pressure vessels and boilers used in elevated temperatures. The material benefits from added chromium and molybdenum which gives the steel greater corrosion resistance and resistance to heat.
2.What is SA 387 12 cl1 material?
SA 387 Grade 12 Class 1 is a chromium-molybdenum alloy steel plate designed for weldable boilers and pressure vessels used in elevated temperature service, offering good corrosion resistance due to chromium and increased tensile strength at high temperatures from molybdenum, with Class 1 indicating a specific range for tensile strength properties.