Bar, Rod and Plate stock
Normally Zinc. but some can be had
in Aluminium or Magnesium.
Rod or Bar stock for machining is of two
Smaller sizes to 1 1/4" diameter can be extruded. This is more expensive but the diameter is accurate and the metal is free from porosity.
Cast bar is available from 5/8" to 6" diameter and also 20 to 150mm. The diameter is nominal size with a rougher finish.
Plate stock is cast. It is flat
on the base but less so
on the top. The usual size is 158 x 260mm but it
can be cast smaller . . . . Zincsmart Home