Self Drilling Hollow Bar Steel Grade
There are many kinds of self drilling hollow bar steel grades globally, the more common ones are 28Mn6, 41Cr4 (40Cr), J55 (37Mn5), N80, S45E (45#), S355N (Q355B), S460N, etc. In fact, the material requirements of SDA should be selected according to the specific application conditions and the factory’s processing technology. The application …
