Casting grade white fused alumina sand/flour(WFA)
The main crystalline phase of casting grade white corundum sand/flour is α-Al2O3, which is white in color and characterized by high refractoriness, low porosity, good volume stability, and excellent thermal shock resistance. It can be used as a surface shell material in lost wax precision casting of alloy steel, carbon steel, and large steel castings. It exhibits excellent thermal stability of the mold shell, high-temperature chemical stability, and good shell detachment and collapsibility.
The main crystalline phase of casting grade white corundum sand/flour is α-Al2O3, which is white in color and characterized by high refractoriness, low porosity, good volume stability, and excellent thermal shock resistance. It can be used as a surface shell material in lost wax precision casting of alloy steel, carbon steel, and large steel castings. It exhibits excellent thermal stability of the mold shell, high-temperature chemical stability, and good shell detachment and collapsibility.
Item No.：Casting grade white fused alumina sand/flour(WFA)
 | Chemical Specifications |
| Item | Content（%） |
| SiO2 | 0.1 |
| Fe2O3 | 0.03 |
| AI203 | 98.5 |
| Real Specific Gravity | 3.96g/cm³ |
| Melting Point | 2050 degrees |
| Mons’ hardness scale | 9 |
| Linear Expansivity | 6.5 X 10 ¯ 6. |
| Thermal Conductivity(1200℃) | 5.908[W/(m.k)] |
| Ig.Loss | 0.3 max |
| Particle Size |
| Item | Content(mesh) |
| white fused alumina sand | 50mesh, 80mesh / customed |
| white fused alumina floour | 200mesh， 325mesh |
| Packing Specification |
25kg Net with three-layer paper bags.
2.0-ton polypropylene woven bag lined with polyethylene film/wooden pallet.
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