Gray irons

See under Fire, n.

See also: Iron

References in periodicals archive ?
The tool life when machining CGI is still less than that of conventional gray iron, but it is approximately the same as for the alloyed gray irons used in most commercial vehicle applications.
The bone of contention is whether it's in your best interests to pay a premium for carbide-free high-strength gray irons and realize the cost saving from improved machinability.
Onsoien, SINTEF, Norway, studied the inclusions that may act as nucleation sites for graphite in over-inoculated gray irons (01-094).
Over the years, chromium and silicon were successively added to the point that it's now common to have gray irons with as much as 2.
Sb is a potent and cost-effective, but also controversial, pearlite stabilizer in gray irons.
He conducted extensive research on malleable and gray irons.
Lastly, the question of graphite lubrication when machining gray irons also is examined.
ADI and ECG provide much higher strengths than conventional ductile and gray irons, respectively.
For gray irons, the inoculant additions are at the rate of 0.
In addition to panels on gating/risering, solving casting defect problems, manganese (Mn) and Mn/sulfur (S) ratios in gray irons, the division featured AFS research reports on fractal methods for assessing ductile iron nodularity, age strengthening of gray iron, status of the ASTM A48 "B" test bar mold and fatigue properties.
The graphite structures that form in cast irons (which are flake-like for gray irons and spherical for ductile irons) are less dense than the iron matrix, and reduce feeding requirements.
Just as we do for class 25, 30, 35 and 40 gray irons, we decided on melting a common base iron that could be alloyed to produce any final grade desired.