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DH40 quality steel plate is asteel plate for shipbuilding
1. Introduction to DH40 steel plate:
DH40 steel plate is a type of marine steel plate with good mechanical properties. D quality grade, H is high-strength steel, and 40 represents yield strength. At the same time, DH40 steel plate has high steel plate strength. After being processed through its own heat treatment process, under the condition of small compression ratio, the appropriate process and the best ratio of internal alloy elements can have good performance under the condition of small compression ratio. Mechanical behavior. DH40 ship plate adds requirements for performance in the thickness direction of the steel plate, that is, Z-direction performance, and the additional Z backward is: DH40-Z35.
2. Implementation standards of DH40 steel plate:
DH40 steel plate is a high-strength marine steel plate that implements the standards certified by nine classification societies. For example, if it implements the China Classification Society, it will be "CCS", if it is the Bureau Veritas, it will be "BV", if it is the American Bureau of Shipping, it will be "BV". Society is the standard of "ABS", so it depends on which country's classification society is certified. Generally speaking, if a certain steel plate is used according to the China Classification Society standard, then all steel plates need to use the same national classification society standard. Ship plates refer to hot-rolled steel plates used to manufacture ship hull structures produced in accordance with the requirements of classification society construction specifications. Structural steel for ship hulls is divided into strength levels according to their yield points: general strength structural steel and high strength structural steel. The general strength structural steel specified by China Classification Society is divided into four quality grades: A, B, D, and E (i.e., CCSA, CCSB, CCSD, CCSE); the high-strength structural steel specified by China Classification Society is divided into three quality levels: Intensity levels, four quality levels.
3. DH40 steel plate delivery status:
The delivery states that can be selected for DH40 steel plates include normalizing, annealing, controlled rolling, tempering, quenching, quenching and tempering, etc. The specific situation depends on the customer's needs. If the customer has his own ideas, he can also negotiate and choose private customization.
4. Purpose of DH40 steel plate:
Thin and thick steel plates for hull structures of ships and marine engineering, coastal and inland navigation vessels. Ship plates must have high strength, good low-temperature impact toughness, and good welding performance.
