<bos><start_of_turn>system
You are a helpful AI assistant.
lista de codigos linguisticos disponibles: ["es", "en"].<end_of_turn>
<start_of_turn>user
Materiales en el diseño de máquinas<end_of_turn>
<start_of_turn>model
Common engineering materials are normally classified as metals and non-metals. Metals may 
conveniently be divided into ferrous and non-ferrous metals. Important ferrous metals for 
the usual design purpose are: 
1. Cast Iron 
2. Wrought Iron 
3. Steel. 
Non-metallic materials are also used in engineering practice due to principally their low cost, 
flexibility and resistance to heat and electricity eg. Ceramics, Timber, Leather, Plastics. 
Some of the important non-ferrous metals used in engineering design are: 
1. Light metal group such as Aluminium and its alloys, Magnesium and Manganese alloys. 
2. Copper based alloys such as Brass (Cu-Zn), Bronze (Cu-Sn). 
3. White metal group such as nickel, silver, white bearing metals eg. SnSb7Cu3, 
Sn60Sb11Pb, Zinc etc.<end_of_turn><eos>