The difference between low alloy steel St52-3, St50-2, S355JR, S355J2, S355NL, A572 Grade 60, A633 Grade A, Q345B, SM490A
St52-3, St50-2, S355JR, S355J2, S355NL, A572 Grade 60, A633 Grade A, Q345B, and SM490A are commonly used structural steel materials. St52-3 and St50-2 are German steel grades, while S355JR, S355J2, and S355NL are European standard steel grades. A572 Grade 60 and A633 Grade A are American ASTM standard steel grades, Q345B is a Chinese national standard steel grade, and SM490A is a Japanese standard steel grade. These steel materials have differences in chemical composition, mechanical properties, and other aspects, so their application ranges are also different. Generally speaking, the specific selection should be based on the actual usage scenario and requirements.
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