Malleable iron casting is made from white stock that iron liquid of definite chemical composition poured ,than repass anneal . It has higher strength , plasticity and impact toughness , can instead of parts carbon steel.
Compared with gray iron casting , malleable iron casting has higher strength , plasticity , in especial , better low temperature impacting property . Its abrasion performance and shock resistance are better than ordinary carbon steel . This kind of iron casting alternate name ductile iron casting and malleable hard iron because of its plasticity and toughness.
Malleable iron casting can be divided into three types , black heart malleable iron casting , white heart malleable iron casting and pearlite malleable iron casting.
Black heart malleable iron casting is used for impact resistant parts or anti – shock devices and parts of torsion load ,and it is usually used to produce vehicle rear bridge , spring bracket , low pressure valve , pipe joint , etc.
Pearlite malleable iron casting normally is used to cast wear parts of power machine and agriculture machine . Automotive camshaft produced by it has been made internationally.
White heart malleable iron casting is used less than others because of the malleablize annealing time too long.