As this group is the fount of all engineering knowledge I wonder if
anybody recognises the name 'Bullet AA' when related to HSS tool
steel?
I inherited from my Father a box full of unused tool steel. There are
various sizes which mostly have a ground finish and the manufacturers
name or the specification etched on them. But there are several three
inch lengths which are roughly 3/8" square with a black unground
finish and with 'Bullet AA' cast(?) on one side. They appear very hard
when touched on the grinder. They could have quite easily have come
from the States as part of lend/lease.
I'm just curious to find out anything about them.
Thanks.
John H
- posted 10 years ago