For hot blast stoveFor eaf roofFor general use Goods no.Ghha65,Ghha55,Ghha48,Rhs,Rh1,Rh2Al,75Al-1Al-2 Al2o3(%) min655548807565756555 Refractoriness( ) min179017701750185018001790179017901770 Refractriness under load 0.2 mpa( )150014701420155015301520152015001470 Apparent porosity (%) max_191922232322 Ccs (mpa)min4944.139.278.568.658.8544944.1 Shrinkage after reheating 1500x2h (%) max+0.1-0.4+0.1-0.4+0.1-0.4+0.1-0.4+0.1-0.4+0.1-0.4+0.1-0.4+0.1-0.4+0.1-0.4.