we can supply all kinds of refractory bricks,such as SK30,SK32..... ITEMNL13SK-30N3SK32SK-34N1NZ42Refractoriness(SK) ≥32≥1710≥31≥1690≥32≥1710≥34≥1750≥34≥1750Bulk Densityg/cm3≥2.3≥1.9≥1.9≥2.0≥2.26Apparent porosity%≤13≤26≤26≤24≤20Cold Crushing StrengthMPa≥49≥19.6≥19.6≥19.6≥40Lingar Expasion% at1000 Rate of lingar Change% at *2hrs -0.5~+0.51350-0.5~+0.51350-0.5~+0.51400≤0.21350Soften Yield Point ...