|
||||||||||||||||||||||||||||||||||||||||||||
| MACHINABILITY | ||||||||||||||||||||||||||||||||||||||||||||
| Due to their high hardness levels, Hardwear�
steels, as all abrasion resistant grades, are inherently more difficult to machine when
compared to normal structural steels. Also, the cleanliness, low sulfur and inclusion
levels of Hardwear steels influence chip breakage behavior. Therefore, machining these
steels requires the use of cobalt-alloyed, high speed steel (HSS) tools or carbide tips,
using a generous supply of cutting fluid. In milling operations, the 400F and 500F grades
require cutting speeds of 45% and 35%, respectively, of the speeds for milling A572-50.
The following parameters have been found effective in the drilling of Hardwear steels (See Table 3). |
||||||||||||||||||||||||||||||||||||||||||||
| Table 3: BLP Hardware� 400F and 500F | ||||||||||||||||||||||||||||||||||||||||||||
|
||||||||||||||||||||||||||||||||||||||||||||
| *Feed Rate In./Rev.
.004, .008, .012 Respectively
|
||||||||||||||||||||||||||||||||||||||||||||
Bethlehem Lukens Plate Products
If you have any questions or comments, please Contact Us
�1999, Bethlehem Steel Corporation