Cast iron manufacture

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Material Information

Title:
Cast iron manufacture
Physical Description:
14 sls.
Creator:
College of Architecure, University of Florida

Notes

General Note:
AFA HP document 818

Record Information

Source Institution:
University of Florida
Holding Location:
University of Florida
Rights Management:
All rights reserved by the source institution.
System ID:
AA00001567:00001

Full Text
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WHAT IS AMERICAN DUCTILE IRON
AMERICAN DUCTILE IRON is a piping material that has ductile rhtrae
teristics comparable to those of steel. In addition to outstanding ducttlity,
it has strength and impact resistance far greater than that of gray iron;
yet it retains the superior corrosion resistance of gray iron.
Ductile Iron is produced by inoculating molten iron with magnesium under
closely controlled conditions. The startling change in the metal is charac-
terized by the form of the free graphite in Ductile Iron being deposited in
spheroidal or nodular form instead of in flake form as in gray iron.
With the free graphite in nodular form, the continuity of the metal matrix
is at a maximum, accounting for the formation of a far stronger, tougher
ductile material differing radically from gray iron in strength, ductility and
impact characteristics.


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Photomic-rograph showing graphite
form in gray iron.


ANSI. Standard A21 51


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Thnc*, properl*ie are controlled by
ifrt. le arniples taken from the wall
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Photomicrograph showing graphite
form in Ductile Iron.










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5 (-4 t. The Cataln Forge. The furnace consisted




a fujsSded bearth containing the ore and charcoal.
er pqe 8.) The blas was produced by a trompe, an
t*U invented Italy in medieval ues which
oMd a preu of air by means of falling water.


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stain forgw but built wlth a higher hrarth. The old
rh isowis the lmthod ox f atharging the tnilolws fnr
wridi two d te bWlast and thie tpping hole.


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