What is Hot Rolled Steel?
2021/05/25 JFS Steel
Hot Rolled is a mill process, where a steel billet is roll-pressed at a high temperature (Typically at a temperature over 926°C or 1700°F), which is above the re-crystallization temperature. The billet runs through the rollers until it achieves its finished dimensions. This hot rolling process enables manufacturers to produce bigger sizes, and by exposing the steel to temperatures above the re-crystallization limits, makes the resulting material more manageable.
After the heating and rolling processes, the steel is cooled down (Allowed for room temperature), causing the material to shrink; therefore, it makes it difficult to keep the precision over the dimensions and shapes. That’s the reason why Hot Rolled Steel (HRS) is recommended to be used only under situations where sizes and tolerances are not essential.
Advantages:
The Hot Rolled Steel is cheaper than Cold Drawn and Cold Rolled. As it is a steel that is produce without any delays in the process, and that does not require reheating process.
It is more manageable. Perfect for construction, welding and railroad tracks.
Disadvantages:
No precision in dimensions.
Rough texture compared to the Cold Drawn and Cold Rolled.
Ju Feng Special Steel Co., Ltd. has a large number of Hot Rolled materials.
Low & mid carbon steel:
S15C / SS400/ S45C
Alloy steel:
SCM440 / SCM415 / SCM420 / SNCM220 / SNCM420 / SNCM439
High carbon steel:
SK2 / SUJ2
Mold steel:
SKD11 / SKD61
Free Cutting Steel:
1144 / 1215 / 12L14