We are offering nitride bonded silicon carbide block for metal melting(zinc, copper, etc.)1.descriptionmade from high quality silicon carbide, silica powder, metal si, by vacuum nitride sintering at high temperature.The size&properties of the product can be customized as per your application, &special technical requirement.with characteristics of chemical&oxidation resistance, excellent corrosion resistance, high temperature resistance.2.packagenormally, 1100kg or1200kg into a non-fumigated crate, each piece is isolated by good padpaper, bubble film, or foam board, etc.Noteall of our export package materials confirms to ippc standard, with an official mark on them. 3.parameteritem furnace lining brick shapes bricksic% 70 70si3n4 % 20 20densitygcm3 2.65 2.60apparent porosity % 17 18cold modulus of rupture mpa 45 40modulus of rupture (1400 degree) mpa 50 45acid-proof alkaline excellent