1. How to select material
There is no one material which is all right for any environment , we have make a careful consideration may need bo be given to strength , temperature , corrosion , vibration , fatigue and other variables .
2. What kinds of popluar materials in the market ?
There are several kinds of materials for hardware so far in the market , such as Carbon steel ( Low carbon steel , Medium carbon steel ) ; Alloy Steel ( eg. ASTM A 354 , ASTM A 193 B7 , 10B21, 1045 etc ) , Stainless Steel ; Brass and Aluminum .