Technology Support

Cast Iron Carbon Content

Table of comparative qualities of cast irons
Comparative qualities of cast irons
Name	Nominal composition [% by weight]	Form and condition	Yield strength [ksi(0.2% offset)]	Tensile strength[ksi]	Elongation [% (in 2 inches)]	Hardness [Brinell scale]	Uses
Grey cast iron (ASTM A48)	C 3.4,Si 1.8,Mn 0.5	Cast	－	50	0.5	260	Engine cylinder blocks, flywheels, gearbox cases, machine-tool bases
White cast iron	C 3.4,Si 0.7,Mn 0.6	Cast(as cast)	－	25	0	450	Bearing surface
Malleable iron (ASTM A47)	C 2.5,Si 1.0, Mn 0.55	Cast(annealed)	33	52	12	130	Axle bearings, track wheels, automotive crankshafts
Ductile or nodular iron	C 3.4,P 0.1,Mn 0.4, Ni 1.0, Mg 0.06	Cast	53	70	18	170	Gears, camshafts, crankshafts
Ductile or nodular iron (ASTM A339)	－	cast (quench tempered)	108	135	5	310	－
Ni-hard type 2	C 2.7,Si 0.6, Mn 0.5, Ni 4.5,Cr 2.0	Sand-cast	－	55	－	550	High strength applications
Ni-resist type 2	C 3.0,Si 2.0, Mn 1.0, Ni 20.0, Cr 2.5	Cast	－	27	2	140	Resistance to heat and corrosion