Steel grades are typically represented in a similar way to alloy structural steels. However, there are specific rules for certain types of steel, especially when it comes to low-alloy high-strength steels.
For example, when marking two pairs of professional low-alloy high-strength steels, special suffixes are added at the end of the steel designation. This helps identify the intended application of the material. For instance, 16Mn is a common low-alloy steel, but when it’s used for bridge construction, it becomes “16Mnqâ€. Similarly, for automobile girders, the designation changes to “16MnLâ€, and for pressure vessels, it becomes “16MnRâ€.
This system ensures that engineers and manufacturers can easily recognize the appropriate grade for each specific use, improving both safety and performance in various applications. Understanding these designations is essential for anyone working with structural or specialized steel materials.
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