... , fireproof rate B1 ISO certificate 1.FeatureMagnesium Plain Board (usually called magnesium oxide board ) is combined system of Mgo, MgCl2 and ... , workshop, computer room, indoor swimming pool, outdoor advertisement, base board of all kinds of decoration and pastes, outer package of ... ) : 0.9-1.03) Thermal conductivity : 0.18 () 4) Refractory temperature: 1350 ()5) Bending strength (M/mm) : 9.3-26 ...