Range of compositions for unalloyed cast irons

Typical carbon, silicon, manganese, sulfur and phosphorus ranges for gray, white, malleable and ductile cast irons.

Range of compositions for unalloyed cast irons
Type of ironCarbonSiliconManganeseSulfurPhosphorus
Gray2.5 – 4.01.0 – 3.00.2 – 1.00.02 – 0.250.02 – 1.0
Ductile3.0 – 4.01.8 – 2.80.1 – 1.00.01 – 0.030.01 – 0.1
Compacted Graphite2.5 – 4.01.0 – 3.00.2 – 1.00.01 – 0.030.01 – 0.1
Malleable (Cast White)2.0 – 2.90.9 – 1.90.15 – 1.20.02 – 0.20.02 – 0.2
White1.8 – 3.60.5 – 1.90.25 – 0.80.06 – 0.20.06 – 0.2