Gray irons

See under Fire, n.

See also: Iron

References in periodicals archive ?
Although ductile irons are stronger and tougher than gray irons, the gray irons were superior in the areas of damping capacity, casting soundness, mold yield and machinability.
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.
Onsoien, SINTEF, Norway, studied the inclusions that may act as nucleation sites for graphite in over-inoculated gray irons (01-094).
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.
The correlation between pinhole occurrence and surface tension is good for gray irons because low surface tension allows easier bubble formation and promotes the occurrence of pinholes.