30crmo nut
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30crmoL(-20): What does “L” mean, and what does “-20” mean? Solve!
30CrMo is a high-hardness alloy structural steel, commonly used to manufacture components with high strength and wear resistance. A nut is a type of fastener that is typically used in conjunction with bolts or studs to secure and connect mechanical equipment and components. 30CrMoL is a low-temperature alloy structural steel, where the “L” stands for low temperature, indicating that it is designed specifically to function in low-temperature environments. The “-20” indicates that the lowest operating temperature for this material is minus 20 degrees Celsius. Therefore, the nuts of 30CrMoL(-20) are suitable for securing and connecting mechanical equipment and components in low-temperature environments. .
L: Low temperature; the new standard no longer requires this marking