L1 /   
4
CH1012
METAL ALLOYS II
eg. Mild Steel            <0.2% C ductile cables
      Medium Steel 0.2-0.6% C tougher girders
      Carbon Steel  0.6-1.5% C  tough    tools
2) Heterogeneous alloys - components not dispersed uniformly. eg. pearlite steel,
phase 1 ferrite, phase 2 cementite Fe3C
            3Fe + C D  Fe3C       DH +ve 
steel at 0.8%C is entirely pearlite
3) Intermetallic compounds- components have discrete compositions (no range).
eg. Ni3Al - jet engines, strong, low r,
  Co5Sm - headset audio magnets, high B / g
At higher the 0.8%C the steel increases in cementite
Ferrite is crystalline,