White Cast Iron

C: 3.5-4

Si: 0.5max

Mn: 0.3-0.6

P: 0.05max

S: 0.05max

Cr: 0.3max







White cast iron  has carbideimpurities which allow cracks to pass straight through. It is the cast iron that displays white fractured surface due to the presence of cementite.  The cementite which precipitates from the melt forms as relatively large particles, usually in a eutectic mixture, where the other phase is austenite (which on cooling might transform to martensite)