|
|
|
|
|
|
|
|
|
 |
|
 |
|
 |
|
 |
|
 |
|
|
|
|
|
|
|
|
|
| 1 |
|
Weight |
|
0.9 ~ 1.3 |
|
Aluminum : 2.8
Iron : 7.9 |
|
2.2 ~ 5.5 |
|
| 2 |
|
Strength
Characteristics
|
|
Compared to Metal, impact strength and hardness is weak. Often added with glass or metal to increase strength. |
|
Strong Strength. Varies in strength levels from lead to steel. |
|
Strong, tensile strength and extrusion strength. Weak impact strength. |
|
|
|
|
|
|
|
|
|
| 3 |
|
Thermal
Characteristics
|
|
Low heat resistance. Weak heat conductivity and strong thermal expansivity. Combustion occurs when fire is near. |
|
Great heat resistance.
Good heat conductivity and thermal expansivity
|
|
Strong heat resistance.
Weak heat conductivity and Weak Thermal Expansivity
|
|
|
|
|
|
|
|
|
|
| 4 |
|
Electrical
Characteristics
|
|
Insulator
semiconductor and some polymers.
|
|
Conductor |
|
Insulator
also semiconductor
|
|
|
|
|
|
|
|
|
|
| 5 |
|
Chemical
Characteristics
|
|
Varies weak acid resistance, alkali resistance and chemical resistance strong from acid, alkali and other chemical. Have many different characteristics to chemicals. |
|
Generally weak in acid, alkali. Some are weak in Inorganic chemicals. |
|
Generally strong in inorganic and organic chemicals. |
|
|
|
|
|
|
|
|
|
| 6 |
|
Plasticity |
|
Has great ability for mass production due to great plasticity. |
|
Generally has poor plasticity. |
|
Plasticity in small amount is efficient; however material efficiency is low and has lots of defects. |
|
|
|
|
|
|
|
|
|
| 7 |
|
Precision |
|
Approx. 1/10 ~ 3/100 used in everyday use. |
|
Precision machining is possible to 1/1000. |
|
Prescribed density is low. Approx. 1/10 ~ 2/10 |
|
|
|
|
|
|
|
|
|
| 8 |
|
Price |
|
Weight is light and has great plasticity, enabling them to be mass produced. Therefore the price is reasonable. |
|
Production is weak and relies strongly on machinery so the price is high. |
|
Productivity and process ability is poor compared to base material value. The price of the product is high. |
|
|
|
|
|
|
|
|
|
