Class notes Manufacturing Methods Unit 1

MANUFACTURING METHODS
UNIT 1 : INTRODUCTION TO MANUFACTURING METHODS
1.0 RAW MATERIALS AND COST
The decision to manufacture of a product is largely dependent on cost. Cost here refers to
the price of raw materials. The price of raw materials is very important in manufacturing of
a product as it could range from to 40% - 50% of final cost of product.
Raw materials are grouped into two main classes, which are metals and non-metals. Further
subgroups are shown below




Ferrous
Metals
Metals
Non-Ferrous
Metals

Raw Polymers
Materials
Organic
Non-
Polymers
Non-Metals
Glasses


Inorganic Ceramics


Composites




Material Properties of Metals and Non-Metals

S/N Metals Non-Metals

1 Good Heat Conductor Poor Heat Conductor

2 Good Electrical Conductor Poor Electrical Conductor

3 Malleable Non-Malleable

4 High Density Low Density



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