Model Chemical Composition% Si Ba Ca Al Fe BN-2011 68-72 0.8-1.2 1.0-2.0 1.5max balance BN-2012 70-75 1.5-2.5 2.5-3.5 1.2max balance BN-2013 62-70 2.0-4.0 - 1.0max balance BN-206 45-52 - 1.0-2.5 1.0max balance Standard Size: 0.2-0.6mm, 0.3-1mm, 1-3mm, 3-8mm Packing: 25kg woven plastic bag in 1mt jumbo bag. Note: Chemical composition, size and packing of above mentioned products can be adjusted according to customer's requirements. Characteristics 1.To promote graphitization and reduce the chilling tendency; 2.To refine grains, reduce segregation and make the organization uniform; 3.To enhance the mechanical strength, adjust the hardness and improve mechanical properties; 4.To improve the matrix and distribution of graphite morphology; 5.To reduce internal stress and sectional sensitivity of castings.