... ignition point in 2700'c Specification:Raw material: Magnesium oxide , magnesium chloride ,fiber glass ,perlite ,wood fiber etc .Incombustible ... confirming to GB6566-2001 A-Class.Specifications:Raw material:Magnesium oxide , magnesium chloride ,fiber glass ,perlite ,wood fiber etc . ... sawing ,planning drilling ,nailing and cutting etc .Magnesium oxide board have been used primarily as fireproof ...