Hot rolling involves rolling the steel above its re-crystallization temperature (typically over 1700° F). At this temperature, it can be shaped and formed easily, and the steel can be made in much larger sizes.
Post the milling process at high temperature, the steel cools off and shrinks slightly thus giving less control on the size and shape of the finished product when compared to cold rolled.
HR - IS 2062
SPFH - STEEL PICKLED FULL HARD
SAPH - STEEL ANNEALED PICKLED HARD
Since Hot Milling occurs at high temperatures, it leaves a discoloring oxide layer on the surface.
Pickling is a surface treatment where the steel is dipped in acid to clean debris, rust and other unwanted foreign materials
PLATE is the technical and most common term used for HR sheets above 4mm
Pickled and Oiled HR Coils
Pickled and Oiled HR Sheets
Pickled and Oiled HR Plates
Similar to HR Plates, HRPO Plates are sheets above 4mm, with Pickling and Oiling surface treatment
Ravindra Kumar Daga
Daga Steel Suppliers,
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STEEL PROCESSING FACILITY
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