hardness 7 5 magnesia chrome bricks

{"cid":"91199495","title":"High Cold Crushing Magnesia Chrome Brick For Mohs Hardness 7.5 - 8.5","imgUrl":"https:\/\/img.chinax.com\/nimg\/05\/fb\/46bea6d9f2356b0698d66ccb4524-200x200-1.jpg","attrs":{"Brand Name":"CH Refractories","Model Number":"CH-N","Place of Origin":"China","Thermal Conductivity":"\u22640.7 W\/m.k","Name":"Magnesia Chrome Brick","Bulk Density":"2.7-3.0 G\/cm3","Linear Change":"\u22640.4%","Porosity":"\u226422%","Apparent Porosity":"\u226418%","Corrosion Resistance":"Good","Chemical Composition":"MgO-Cr2O3"}}

{"cid":"91102989","title":"High Chrome Mill Ball Grinding Media Chrome Steel Balls with Fe2O3 Content 0.5-1.5% and Compressive Strength 50-100 MPa","imgUrl":"https:\/\/img.chinax.com\/nimg\/23\/57\/759f1daa584dcb63b27f3a069782-200x200-1.jpg","attrs":{"Brand Name":"RONGSHENG","Certification":"ISO9001","Place of Origin":"Henan, China","Apparent Porosity":"22%","Raw Materials":"Magnesia\uff0cCarbon","Refractoriness Under Load":"1620C","Compressive Strength":"50-100 MPa","Mgo":"60%","Color":"White","Refractoriness":"1700-1800 \u00b0C","Fe2O3 Content":"0.5-1.5%","Shape":"Rectangular","Cold Crushing Strength":"60 MPa","Usage":"Refractory Material","Acid Resistance":"Good","Crushing Strength":"45MPa","Thermal Conductivity":"1.5-2.0 W\/mK","Size":"Can be customized,230x114x65mm"}}