ASTM SA387 Gr12 Cl2 Alloy Steel Plates Exceptional Strength and Durability Custom Cutting Plate
Products Specification
| Product Name | SA387 GR12 CL2 Steel Plate |
| Thickness | 3mm~300mm,2mm-100mm is common thickness,also can customize |
| Width | 1000~3000mm,common width is 1250mm,1500mm,2000mm,2200mm |
| Length | 1000~12000mm,can as your request cut |
| Surface | Clean,finished, blasting and painting or as your request |
| Delivery | Hot Rolled, Controlled Rolling,Normalizing,Annealing, Tempering,Quanching, Q+T |
| Packing | Steel Strapping,fixing in the Container,can customize |
| Thickness tolerance | ±0.3mm |
| Application | It is mainly used to make structural parts such as car girder, beam, transmission shaft and car chassis parts, which can reduce the weight of the parts. |
SA387 GR12 CL2 Alloy Steel Plate Product Information
1. Product Overview
SA387 GR12 CL2 alloy steel plate is a high - performance material designed for specific industrial applications. It falls under the ASME SA - 387/SA - 387M standard, which is dedicated to pressure vessel steel plates made of alloy steel with chromium - molybdenum. This standard ensures that the steel plate meets strict quality and performance requirements.
2. Performance Characteristics
2.1 High - Temperature Performance
The chromium - molybdenum alloy composition endows SA387 GR12 CL2 with excellent high - temperature properties. It can maintain good strength and stability at elevated temperatures, typically up to 480°C. This makes it highly suitable for applications in high - temperature environments, such as in boilers and certain chemical reactors.
2.2 Corrosion Resistance
It shows remarkable resistance to hydrogen embrittlement, hydrogen blistering, and sulfide corrosion. This corrosion - resistant property is crucial in industries where the steel plate may come into contact with corrosive media, especially in petrochemical plants dealing with hydrogen - containing and sulfur - containing substances.
2.3 Mechanical Properties
- Tensile Strength: The tensile strength of SA387 GR12 CL2 steel plate ranges from 450 - 585 MPa. This indicates its ability to withstand significant pulling forces without breaking.
- Yield Strength: With a minimum yield strength of 275 MPa, it can resist permanent deformation under stress, ensuring the structural integrity of the components made from this steel plate.
- Impact Resistance: It has good impact toughness, with an impact energy of at least 41 J. This property enables the steel plate to endure sudden impacts without fracturing, which is important in applications where dynamic loads may be encountered.
3. Chemical Composition
The chemical composition of SA387 GR12 CL2 is precisely controlled to achieve its outstanding performance. The main elements and their typical content ranges are as follows:
- Carbon (C): 0.04 - 0.17%. Carbon is a fundamental element in steel, influencing its strength and hardness. In this steel plate, the carbon content is optimized to balance mechanical properties.
- Silicon (Si): 0.13 - 0.45%. Silicon helps to deoxidize the steel during the manufacturing process and can also enhance its strength.
- Manganese (Mn): 0.35 - 0.73%. Manganese improves the hardenability of the steel and also contributes to its strength.
- Phosphorus (P): ≤0.035%. Phosphorus is generally considered an impurity, and its low content limit helps to prevent embrittlement and ensure good cold - working properties.
- Sulfur (S): ≤0.035%. Similar to phosphorus, sulfur is an impurity, and its low content is maintained to avoid hot - shortness and improve the quality of the steel.
- Chromium (Cr): 0.74 - 1.21%. Chromium significantly improves the steel's corrosion resistance and high - temperature strength.
- Molybdenum (Mo): 0.40 - 0.65%. Molybdenum further enhances the high - temperature strength, creep resistance, and corrosion resistance of the steel.
4. Mechanical Properties
In addition to the tensile strength, yield strength, and impact resistance mentioned above, SA387 GR12 CL2 also has the following mechanical properties:
- Elongation: For thicknesses up to 50 mm, the minimum elongation is 22%, and for thicknesses between 50 - 200 mm, it is 19%. Elongation indicates the steel plate's ability to deform plastically before fracture, which is important for forming and shaping processes.
5. Processing and Welding
5.1 Processing
SA387 GR12 CL2 steel plate has good machinability. It can be processed using various methods such as cutting, rolling, and forging. When cutting, different techniques can be selected according to the thickness of the plate. For example, for plates thicker than 30 mm, flame cutting can be used (while controlling the pre - heating temperature); for plates with a thickness of 20 mm or less, plasma or laser cutting is recommended for precision machining with less deformation of the cut edge; for ultra - thick plates (over 100 mm), water cutting is the preferred choice as it has no heat - affected zone.
5.2 Welding
The steel plate has excellent weldability and can be welded using multiple welding methods, including manual arc welding, submerged arc welding, and gas - shielded arc welding. However, during welding, appropriate pre - heating and post - welding heat treatment are necessary. The pre - heating temperature is usually around 150 - 200°C, and the post - welding heat treatment temperature is generally in the range of 650 - 710°C. These measures help to prevent the formation of cracks and ensure the quality of the welded joint.
6. Application Areas
Due to its excellent performance, SA387 GR12 CL2 alloy steel plate is widely used in many industries:
- Petrochemical Industry: It is used to manufacture equipment such as hydrogenation reactors, gasifiers, and storage tanks. In hydrogenation reactors, its high - temperature and corrosion - resistant properties are essential for withstanding harsh operating conditions.
- Power Generation Industry: For power plants, it is used in boiler components like boiler drums, superheaters, reheaters, and economizers. The steel plate's ability to maintain strength at high temperatures ensures the safe and efficient operation of boilers.
- Aerospace Industry: Although less common compared to the above two industries, it may be used in some high - temperature components of aircraft engines, taking advantage of its high - temperature strength and lightweight characteristics (relatively speaking in the context of aerospace materials).
7. Standards and Specifications
SA387 GR12 CL2 alloy steel plate complies with the ASME SA - 387/SA - 387M standard. In addition, it also refers to other relevant standards for quality control and inspection:
- ASME SA20/SA20M: General requirements for pressure vessel plates, covering aspects such as dimensions, tolerances, and marking.
- SA370: Test specification for mechanical properties of steel, which provides methods for testing tensile strength, yield strength, elongation, and other mechanical properties.
- SA435/SA435M: For straight - beam ultrasonic examination of steel plates, used to detect internal defects in the steel plate.
- SA577/SA577M: For ultrasonic angle - beam examination of steel plates, another method for non - destructive testing of steel plates.
- SA578/SA578M: For straight - beam UT examination of rolled steel plates in special applications, ensuring the quality of steel plates for specific uses.
8. Delivery Status
The steel plate is usually delivered in the normalized and tempered state. However, according to customer requirements, it can also be delivered in other states such as normalized, annealed, or quenched and tempered.
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