What is the difference between hot rolled and cold rolled stainless steel?
Stainless steel rolling is divided into cold rolling and hot rolling, with recrystallization temperature as the distinguishing point.
Hot Rolling:
1. Poor toughness and surface flatness, low price;
2. The temperature of hot rolling is similar to that of forging;
3. The hot plate has oxide skin on the surface of the hot tie processing, and the thickness of the plate has a lower difference;
4. The price and use of hot-rolled products are much more extensive than that of cold-rolled products;
5. Hot rolled steel plate, mechanical properties are far less than cold processing, but also inferior to forging processing, but has better toughness and ductility;
6. The surface of the hot tie plate without electroplating is black brown;
7. It can be distinguished from the smoothness of the surface after electroplating, and the smoothness of the hot tie plate is low;
Cold Rolling:
1. Good extensibility, toughness, but the price is more expensive;
2. No oxide skin on cold binding surface, good quality;
3. Cold rolling is generally used for the production of strip, and its rolling speed is higher;
4. The thickness accuracy of cold rolling is higher than that of hot rolling, and the mechanical properties and surface are all above hot rolling;
5. Cold rolled steel plate due to a certain degree of work hardening, low toughness, but can achieve a better yield ratio, used for cold bending spring pieces and other parts;
6. Because the yield point of the cold plate is close to the tensile strength, there is no predictability of the danger during use, and accidents are prone to occur when the load exceeds the allowable load
7. The surface of the cold tie plate without electroplating is gray.
8. The surface smoothness of cold binding plate after electroplating is higher than that of hot binding plate
