1 Exterior:white fine powder 2. Moisture content:less than 0.03 3 Average particle size: 20-100 micro 4 Tensile strength: 27.5 Mpa 5. shrink rate: less than 4.5 6: Appaent density: 2.13-2.19 7. elogation: more than 280 8. Corrosion resistance: No change 9. Melting point: 327 Centigrade