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Uses high quality alloy steel materials and it is a strong Grade-80 product. Tempering heat treatment (HRC40) was performed in this product for optimized elongation percentage.
Quenched and tempered on the surface, it is the great product of Grade-80 made of highly qualified alloy steel and optimized with elongation by HRC 40. For that character, it is mainly used for the below cases which have low frequency of consecutive use.