Precoated Sand
Pre-coated sand is suitable for producing the shell cores process in iron, steel and non-ferrous foundries. The pre-coated sands have the advantage of high dimensional accuracy with good hot and cold bending strengths and good collapsing ability as after pouring.
Chemical analysis:
SiO2% | Na2o+K2O% | CaO+MgO% | Al203% | Fe203% | H.T.S | C.T.S | B.S | L.O.I |
99 | Max 0.5 | Max 0.5 | Max 0.5 | Max 0.5 | Min 20 | Min 35 | Min 90 | Max 4 |