Hot Rolled 1045 vs Cold Rolled Steel Plate: Which One Is Right for You?

When choosing steel for your project, understanding the difference between hot rolled and cold rolled 1045 steel can help you make a smarter, more cost-effective decision.

Hot rolled 1045 steel plate is processed at high temperatures, making it easier to form and shape. It’s known for its lower cost, rougher surface, and slightly looser dimensional tolerances. This makes it ideal for structural parts, machine components, and applications where precise finishes aren’t required.

In contrast, cold rolled steel is processed at room temperature after hot rolling. This gives it a smoother surface, tighter tolerances, and increased strength and hardness. However, it comes at a higher price and is typically used for high-precision parts, automotive components, and decorative applications where appearance and exact sizing are critical.

Here’s a quick comparison:

Feature	Hot Rolled 1045	Cold Rolled Steel
Surface Finish	Rough	Smooth,clean
Dimensional Accuracy	Standard	High
Cost	Lower	Higher
Machinability	Good	Excellent (after annealing)
Typical Uses	Shafts,gears,frames	Precision tools,dies

In summary:

Choose hot rolled 1045 if you need strength and formability at a lower cost.
Choose cold rolled steel for precision and appearance.