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Question:

Which is good, z15 grade steel plate and z25 grade steel plate?

Which is good, z15 grade steel plate and z25 grade steel plate?

Answer:

It is obvious that the fracture resistance of lamellar fracture is stronger than that of fracture shrinkage, that is, the lamellar tearing resistance of Z25 is better than that of Z15.
Both Z15 and Z25 are the properties of steel against lamellar tearing. Their properties are marked by the fracture shrinkage index of tensile specimens in thickness direction (15 and 25 in Z15 and Z25 are the minimum values of fracture shrinkage)

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