CH1012
L1 /
‹#›
L1 /
5
METAL ALLOYS III
• Alloys are prepared at the final stage
in
metallurgy where the required alloying elements are added to the molten metal.
metallurgy where the required alloying elements are added to the molten metal.
• Alloying changes properties such as
1) lustre sterling silver Ag 92.5 Cu 7.5
1) lustre sterling silver Ag 92.5 Cu 7.5
2) malleability dental amalgam
Ag 70 Sn 18 Cu 10, Hg 2
Ag 70 Sn 18 Cu 10, Hg 2
3) ductility permalloy ocean
cables
Ni 78 Fe 22
Ni 78 Fe 22
4) hardness tungsten
steel Fe 80 W 20
5) melting
point tin solder Pb 67 Sn
33
mp. 275oC (c.f. Pb 327oC, Sn 232oC)
mp. 275oC (c.f. Pb 327oC, Sn 232oC)
6) corrosion stainless steel Fe 72 Cr 18 Ni 1
